Window buying guid ( 1st edition)

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Windows Buying Guide – 2017 More Info Follow us : #Smart_window 002 011 00 55 97 20

Window Buying Guide

“First Edition”

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Content:

1. Introduction.

2. What to look for in a new window?

3. New window requirements

4. Materials

a. Timber windows

b. uPVC windows

c. Aluminum windows

d. Composite windows

5. What suitable Window for different Kind of Houses?

a. Traditional houses

b. Suburban housing

c. Modern architectural

6. Window Glass & Glazing Types.

a. Single glazing

b. Double glazing

c. Triple glazing

d. Quadruple glazing

7. Types of glass

a. Low E glass

b. Security glass

c. Sound reduction glass

d. Colored glass

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e. Leaded glass

f. Obscure glass

8. Window Styles & Designs

a. Casement windows

b. Dual turn windows

c. Tilt and turn windows

d. Sliding Sash windows

e. Tilt Sliding sash window

f. Georgian windows

g. Custom shaped windows

h. Fixed pane glass windows

9. How to choose a window style that's right for your home?

a. Combining window styles

b. Window frames

10. How are windows made?

11. Window seals

12. Window accessories & fittings

13. Energy Efficient Windows

14. Questions to ask before you buy new windows

15. References

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Introduction.

“Window Buying Guide” is very useful for everyone need to answer:

How choose the right window for my home?

New windows are usually installed when the homeowner wants to change

the size or shape of the current window opening and put a completely new

window in its place. This generally requires the work of a contractor to

complete the installation and surrounding carpentry.

While new windows generally do not cost more than replacement, the

additional labor adds to the overall price. A big advantage of new windows is

that you have the option to completely change the appearance and feel of

your home both inside and out.

Finding the perfect windows for your home can be a daunting task – new

windows need to deliver on a wide range of requirements to keep you safe,

warm and comfortable for many years to come. That’s why we’ve decided to

use our 15 years of research, design and development experience to help

you purchase wisely.

In this guide we use British Standard for Performance of windows and doors.

And most popular and trusted companies’ sites of UK, Germany and USA for

Classification for additional performance characteristics and guidance on

selection and specification.

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What to look for in a new window?

Anybody who is yet to buy a window could be forgiven for thinking that one

window is pretty much the same as another.

There's more to choosing a window than meets the eye. Not only do you

have to decide on the window style that will suit your home, but frame

material, type of glazing and opening options are all important elements to

consider before buying a window.

We believe that in helping you understand the more technical aspects of

glazing, we can help you make the right decisions, leading you to windows

that will help keep you safer, warmer and happier for many years to come.

That’s why we’ve created this comprehensive guide to help you understand

everything you need to know about windows.

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New window requirements

Everyone’s needs, tastes and requirements are different, but the ideal

window should offer the following benefits:

Be easy to maintain and clean

Let in a good amount of light

Look good and be aesthetically in-keeping with your home

Be highly secure with multi-point locks and mechanisms

Have glass that can’t be removed from outside of the home

Have a high energy rating (A+32 is currently the highest) to reduce

energy bills

Be made-to-measure, therefore fit perfectly into the aperture of your

home

Keep out Dust and Weather pollution.

Not move or rattle when the wind blows

Long lasting guarantees that cover all areas of the window (not just the

glazing)

Add value to your home

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Materials

Modern window materials & new technologies

Historically, windows were made using timber frames. Steel windows came

into use in the early part of the 20th century, followed by aluminum in the

post-war period. But as good conductors of heat, metal windows easily let

heat escape from a home. uPVC windows were introduced in the 1980s as a

more energy efficient type of window, and remain the most popular window

material to this day.

The modern uPVC window has been in development now for over 40 years.

During this time, a great deal of effort has gone into creating something that

not only looks fantastic, but also performs to the highest security,

performance and environmental standards now expected by the EU and UK

Governmental regulations.

Advances in manufacturing technology means that modern windows offer

better performance than ever before. Whichever material you choose, your

new windows are likely to beat your current windows for security, strength,

energy efficiency and lifespan.

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uPVC windows

UPVC is ‘unplasticized polyvinyl chloride’. It is a polymer derived from ethylene (from natural gas) and chlorine (from salt water). There are a number of industrial chemical processes involved in its production. One of the ingredients, vinyl chloride monomer, is a carcinogen. There are strict EU controls to prevent exposure to this ingredient during manufacture and to prevent harmful emissions. Stabilizers are added to improve uPVC’s resistance to heat and sunlight. Some stabilizers have contained the harmful heavy metals cadmium and lead.

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In the EU, cadmium stabilizers have been phased out. Lead stabilizers have been reduced significantly (by 81.8% between 2000 and 2011) and are on track to be completely phased out by the end of 2015. Long lasting and low maintenance, offering high performance at affordable

prices.

uPVC is often touted as a miracle material for windows that ticks all the

boxes for any project. The truth is that uPVC is a good all-round material that

makes smooth and stylish frames that will never rot, flake or rust. uPVC

windows are still among the most energy efficient available, and – with

excellent double glazing – can achieve up to an A+12 Windows Energy

Rating.

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uPVC is a popular choice for windows as

it offers fantastic value for money,

although for some it may lack the unique

charm of other materials.

However, it is now possible to buy uPVC

windows designed to emulate traditional

timber frames, to such an extent that it

can be difficult to tell them apart.

It used to be

that you could

have any

window, as long

as it was white.

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Now uPVC frames are available in a

range of colors, guaranteed to last a

lifetime with extensive

guarantees against frame

discoloration. Many windows also

now contain lead-free uPVC, which is

an important environmental and

health factor.

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The main environmental concerns about uPVC relate to what happens at the end of its useful life. UPVC windows are estimated to last up to 35 years. After that time, they can become brittle, showing cracks, and lose their glossy appearance, attracting algal growth.

They can be painted, even though a principal selling point is that they are supposed to be maintenance-free. (this Just available in EU right now)

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Historically in the UK, uPVC waste ended up in landfill or was incinerated (resulting in contaminated ash, which was then landfilled). Incineration of any waste containing chlorine can result in

formation of harmful dioxins.

The uPVC industry is now developing a range of recycled

products. Frames made from 98% recycled uPVC are

now

available. The bulk of the frame is made from recycled uPVC and the surface is laminated with a thin coating of new ‘virgin’ uPVC. Such frames have been given an A* rating by BRE. In 2009, they won the Best Recycled Product Award at the National Recycling Awards, for frames manufactured and installed in a social housing project in Manchester. The carbon footprint for that project was 6% of the equivalent carbon footprint had the frames been made from virgin uPVC.

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Most popular Upvc Windows Profiles founded in Egyptian Market:

1- Germany Profiles:

Like (Profine Group “Kommerling, KBE” - VIKA)

2- Turkish Profiles:

Like (Deceuninck - Adopen “Wintech” – Firat “winhouse” – Kompen –

Proline – Polywin).

3- Egyptian Profiles:

Like (Protech – Emapen – Manazel - HIYU).

4- K.S.A Profiles:

Like (Wintek – Faza).

5- Jordanian Profile:

Like (Architekt)

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Timber windows

Offers the lowest thermal conductivity. Classic looks, but is most expensive.

Timber is the highest performing material in terms of energy efficiency, as it

is a natural insulator that absorbs and retains heat. Timber windows are

seen to be most attractive, but natural materials such as wood require more

looking after to keep them at their best.

Timber frames can be made from both softwood and hardwood. Softwood is

faster growing and more plentiful, so it's cheaper. Hardwood grows slower

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and is more durable, so tends to be more expensive. Modern timber frames

are engineered to be stronger, meaning they will not warp or bow, and can

also be treated to resist rot and fungus.

What are the advantages of timber? Timber is a natural material which grows well in our climate. It has some significant plus points:

Timber is a natural

material. Apart from some tropical hardwoods and some North American and Siberian softwoods, the timber process is sustainable. In many countries, more trees are planted than harvested, especially in Scandinavia.

Properly maintained

timber windows can last 100 years or more.

Timber frames can be

mended relatively easily.

At the end of its useful life, timber can be used as an environmentally

friendly bio-fuel.

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The added beauty of timber is that it can have a stained or painted finish,

and it is the only material that can be repainted a different color at a later

date, so personalizing the look of your home becomes even easier.

Aluminum windows

Slim frames let the lightest in. Stylish exterior is ideal for modern properties.

Aluminum windows are used in structural

glazing and other commercial construction

projects due to its strength. In domestic

properties, this allows for a much thinner

window frame and a larger glass surface

area, letting more light into the room.

As a metal, aluminum is a natural heat

conductor, letting heat pass through

easily. Aluminum windows feature a

thermal barrier in the frames, which

reduces heat loss through the frames. In

the last 10 years, thermal barrier

technology has improved massively, and

aluminum windows can now achieve

almost the same high energy ratings as

uPVC windows.

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Aluminum windows are also extremely weatherproof and low maintenance. But

not either uPVC windows, unlike other metals, aluminum does not corrode, so

window frames will not rot, flake or rust.

It used to be that you could have aluminum windows in any color as long as it

was silver, but not anymore! A powdered coated finish allows a wide range of

colors to be chosen for the frame – including non-metallic colors.

Light yet strong, aluminum windows and doors can be configured into a wide variety of combinations. The narrowness of the frame places the focus on the glass and subsequently, the view it offers. Multi-panel door systems are often made with aluminum frames to facilitate indoor/outdoor living. aluminum frames are available in anodized or baked-on finishes for long lasting color. Sealed, mechanically joined corners stay square and true over years of use.

Aluminum is not recommended in beach homes for while the material is water resistant, it can suffer corrosion from salt water and salt air. The corrosion affects hardware operation and frame performance.

Compared with vinyl, fiberglass and wood frames, aluminum conducts heat and cold the least well.

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To reduce heat flow, we offer a Thermally Improved Aluminum frame in select regions. Thermally Improved Aluminum windows and doors are equipped with thermal breaks to separate the interior and exterior surfaces and improve energy efficiency.

Composite windows

‘Super windows’ that offer the benefits of

many window materials combined.

Composite windows combine the benefits of

different materials, to offer the best

strength, security, energy efficiency,

aesthetics and lifespan.

One popular option combines the

craftsmanship and detailing of timber

windows with the benefits of the uPVC

material. Another option is aluminum-clad

timber, for a low maintenance and

weatherproof window that offers all the

charm of a classic wooden window from the

inside.

Note : This type is not available in M.E ( just in Europe)

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Which material should I choose for my new windows?

Deciding on the best window material for your property can be a challenge. The

good news is that window engineering has advanced considerably in the last 15,

25 or even 50 years since your last windows were installed – meaning that you

will definitely notice the benefits of upgrading your windows, no matter which

frames you choose.

With improvements in window design, traditional differences between materials

are slowly disappearing.

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You can now get uPVC windows that are virtually indistinguishable from their

timber counterparts, as well as stylish aluminum frames that look exactly like uPVC

windows, only slimmer.

That being said, some materials still suit some properties better than others:

Traditional houses

Houses built before the 20th century would have originally

had wooden windows, and still suit these today. Countryside

cottages, 1930s semis and Victorian terraces are examples of

period properties where timber windows are perfectly suited.

With sliding sashes or period detailing, modern uPVC

windows can sometimes replicate these styles, but for a truly

authentic feel, there’s no replacement for timber.

Why not try timber casement windows with Georgian bars

or sliding sash windows?

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Suburban housing

Properties in housing developments

built from the 1960s onwards tend to

have white uPVC windows.

Replacement uPVC windows are a

great choice to retain this timeless

look, and they can be customized with

a variety of frame colors to add a

unique touch. If you’re looking to

maximize light in your home, such as

in a basement flat, aluminum windows

are a sleek alternative.

Why not try uPVC casement windows?

Modern architectural

For that stylish ‘Grand Designs’ look,

there’s no better choice than

aluminum. Used in structural glazing,

aluminum is a strong material that can

hold larger glass units – letting in large

amounts of light. Aluminum frames are

almost ‘flush’, meaning they sit flatter

than uPVC frames and have neater lines

– ideal for angular designs.

Why not try aluminum structural

glazing or uPVC casement windows?

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Of course, these are only suggestions and you can choose almost any type of

window for your home. If you need more assistance, ask your advisor for more

suggestions tailored to your property.

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Window Glass & Glazing Types

Originally, windows only had one job, and that was to let light into a building. The

first windows were made with pieces of crown glass held together by lattice

leading. Soon after, the invention of thinner and flatter plate glass led to larger

squares of glass held together by wooden glazing bars.

Float glass was invented in the late 1950s, allowing for the quicker production of

large, flawless glass sheets. This helped spur on the development of more

advanced glazing. Double glazing became the norm from the 1970s onwards, as

energy efficiency, comfort and security became more important to homeowners.

So how does double glazing work? And why are more panes of glass better?

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Glazing options

Single glazing

Does a job, but offers limited sound insulation, security and energy efficiency.

A surprising number of houses in Egypt are still only single glazed. Windows can

be one of the greatest sources of heat loss in a home, and one pane of glass is

not sufficient to retain heat.

Complaints about old single

glazed windows include:

cold spots near the window,

draughty frames, freezing

cold house and noise

pollution from the outside –

all problems that will

disappear by upgrading to

new double glazing.

Installing single glazing is still

a requirement on occasion

where planning or

conservation regulations

apply. Along with timber frames, single glazing helps a property retain its period

look. Another way to improve insulation under these circumstances is to install

secondary glazing.

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Double glazing

The minimum standard for new windows and the most popular choice.

Double glazing is one of the most effective ways to improve the insulation of a

home, creating a warm and comfortable living environment.

In a double glazed window,

two panes of glass are joined

by a spacer bar, and the gap

between the panes traps warm

air, slowing the escape of heat

from a building.

In addition, the best windows introduce an inert gas such as argon gas in this

space, which further limits the movement of cold air.

In the UK, all new buildings must

include at least C rated double

glazed windows as standard, but

many companies are offering

double glazing that can achieve an

A or even A+ rating.

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Triple glazing

Safer, quieter and warmer windows.

Triple glazing contains a third pane of glass, creating an extra cavity which traps

warm air and reduces heat loss through the sealed unit. Triple glazed

windows are better at retaining heat generated within the home, whilst reducing

overheating in summer.

A common misconception about triple glazing is that the improvement in thermal

performance is due to the extra pane itself. However, it is more about the types

of glass and coatings used, the gas filled sealed unit, and also the distance

between the panes.

Is triple glazing really any better than double glazing? Ultimately, triple glazing

provides next-level heat and sound insulation. It is up to 35% more effective than

double glazing for thermal efficiency, and reduces outside noise by up to 35

decibels.

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For some properties, triple glazing isn’t high priority, but it’s recommended for

houses next to busy roads, train lines and under flight paths, or in typically colder

areas.

Quadruple glazing

Ambitious, but a step too far?

Some firms have tried to introduce a fourth pane of glass, but there is currently

very little demand in Egypt to develop quad glazing.

Colder countries such as Canada and Switzerland are already using quadruple

glazed windows, but the UK doesn't plunge to such low temperatures that it

would justify the need for thicker windows.

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In some cases, a good triple or double glazed window can be as thermally

efficient as a brick wall. Also, the cost of quad glazing is likely to outweigh the

thermal benefits that an extra pane will bring.

Secondary glazing

A practical alternative to double glazing for conservation areas

There are instances when it is not possible to physically replace a window as you

may live in a listed building or conservation area, for example. Despite this, you

may very well feel you’re getting too much noise or cold air from outside.

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Secondary glazing is an additional window installed directly inside of the existing

window frame. It can help your home achieve thermal, security and

soundproofing benefits, whilst remaining invisible to the outside.

Types of glass

It’s not all about the number of panes of glass – new technologies have been

developed that make window glass stronger, shatterproof, clearer and quieter.

Consider which types of glass would be best suited to the requirements of your

windows.

Low E glass

Invisible reflective coating

Low emissivity glass has an

invisible, thin coating

applied to its surface that

reflects heat. It is

strategically placed on the

inner pane of glass to help

keep heat indoors, helping

to maintain a comfortable

temperature.

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Low iron glass

Clearer, allowing for more light

Windows that contain low iron glass

are noticeably clearer. They allow a

higher level of light to pass through

compared to older glass types, which

sometimes have a slightly green tint.

Security glass

Thicker glass, laminated or toughened to enhance security.

Security glass is available in a range of sizes and thicknesses depending on your

security needs. Typically, laminated glass is 6.4mm thick (compared to 4mm for

standard glass), and contains a thin plastic interlayer that prevents the glass from

smashing. Toughened glass is up

to five times as strong as ordinary

glass of the same thickness.

Security glass is used as an outer

pane in a double glazed unit,

adding an extra layer of security to

the window as a whole.

Toughened glass must also be

used for fixed lights in side panels

to doors, as well as in windows

close to the ground.

Sound reduction glass

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Outstanding levels of noise reduction

Sound reduction glass windows

contain an inner pane that is 6.4mm

thick supported by an outer pane

that is an incredible 10mm thick.

Together, they provide excellent

sound insulation. A thin and

lightweight solution to noise

problems, silent windows are a

powerful alternative to triple

glazing.

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Coloured glass

Enhancing the character of your window and home

Add colored shapes, patterns

and beveled designs into the

glass itself. Decorative glass

looks beautiful in top hung

fanlights – the top sashes of

casement windows – as well as

feature windows in halls and

stairwells. Colored glass is

similar to stained glass

windows, but it doesn’t

require leading to hold the

glass together.

Leaded glass

A new version of an old classic

Stylish strips of lead are a purely visual benefit that can be

added to your window in order to make it more

aesthetically pleasing. There are a range of leaded glass

options that suit both modern and traditional houses,

including square and diamond designs.

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Obscure glass

Maintains privacy with distinctive character

Obscure glass creates a ‘cloudy’ effect,

enhancing privacy by blurring out your home’s

finer details to passers-by. Also known as

privacy glass, there’s a variety of textures

available, such as leaves and flowers, as well as

grainy patterns.

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Window Styles & Designs

Window styles tend to be named after the way they function, and although

window companies give their ranges different names, they’re usually self-

explanatory. Casement windows open outwards, sash windows have sashes that

slide up and down, and tilting or turning windows usually open inwards or flip

around for ease of cleaning.

Most people opt for

casement windows –

these are the simplest to

operate and suit nearly

every home. However,

some houses will require

different window

designs, depending on

the project.

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Casement windows

Casement windows have emerged as the

most popular window style. They can be

hinged on the side to open left or right, or

hinged to open upwards. Extremely

versatile, casement windows can be

designed to suit a range of properties – with

over 250 frame designs. Modern technology

means they are very secure, with multiple

locking points along all sides of the frame.

Dual turn windows

Dual turn windows combine classic casement windows with modern pivot

technology. They work by pulling the window down and inwards to open, turning

the window on a pivot to fully reverse the sash. This is useful for cleaning both

sides of the window with ease, as well as allowing optimum airflow on a hot

summer’s day.

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Tilt and turn windows

Tilt and turn windows possess a dual

hinge arrangement that allows the

windows to tilt inwards using a hinge

at the bottom, as well as opening

inwards with a side hinge. Tidy and

efficient, these windows have been

designed for flats, apartments and

other upper stores, providing secure

ventilation and an easy way to clean

windows from the outside.

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Sash windows (Vertical)

Sash windows are among the most traditional window styles. Historically made

from timber, sash windows can now be made from uPVC, for a classic window

design that fulfils more modern day performance requirements.

There are several

different styles of sash

window available,

modelled on designs from

the Georgian, Victorian

and Edwardian periods.

Sash window designs vary

depending on the era, but

tend to have a thicker

frame depth and a deep

bottom rail.

Sash windows

traditionally operated on

a pulley system of cords

and weights, allowing

users to lift the sliding windows open and shut. Modern sash windows tend to

use a metal rod or ‘spiral balance’ to slide the window open. This device is

smaller and so allows for a larger glass area, letting more light enter the room.

But until now not available in Egyptian Market.

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Tilt sash window

Tilt sash windows have the appearance of a standard

sash window but as well as sliding, one or both of the

sashes tilt inwards for easy cleaning. Tilting sashes

have the attractive appearance of the traditional sash

window, but are more practical for the modern home.

Georgian windows

Georgian bars can be added to either casement or sash windows to add a touch

of traditional charm to your home. These bar details can sit internally or

externally – internal glazing

bars sit between the glass

panes and keep your windows

easy to clean, whereas

external bars sit on the surface

of the glass.

Another option is diamond or

square leaded glass designs –

these patterns are applied to

the outer pane of double

glazed units and are available

in many widths and colors.

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Custom shaped windows

Windows don’t have

to be rectangular, and

actually bespoke

shaped windows can

give your home a

unique edge. Every

good window

company will make

your windows to

measure, and arched,

round, angular and

apex windows can be

easily custom made.

Fixed pane glass windows

Often referred to as a ‘picture window’, fixed windows do not open, and so are

installed purely for letting

light into a space, or to

showcase the outdoors.

Fixed pane windows don’t

just have to be rectangular.

Circular or hexagonal portals

are popular, as are lancet

and other shaped fixed

lights in high or hard-to-

reach places.

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How to choose a window style that's right for your home?

Many people decide to replace their existing windows like-for-like, but with so

many window designs, frame styles and other decorative features, there could be

a better window out there to your home.

First, think about the

window’s functionality

– standard casement

windows are well

suited to most projects,

but if ventilation,

security or

maintenance are a

concern, it’s worth

checking out other

styles.

One way to make sure

your house looks top

class is to ensure that

each individual window appears balanced in its own right. We call this ‘window

framing’ – choosing a symmetrical window will enhance the aesthetics of your

property and create a lasting impression.

Whichever window style you choose, you can complement the look by

customizing with decorative glass, Georgian bars, and customizable fixtures and

fittings.

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Combining window styles

Houses often incorporate window sets made from different configurations. Many

of these window styles can be combined to create a row of windows, such as

sash windows fitted

together to create a

bay window, or a bow

window constructed

with Georgian style

windows.

The same applies

when choosing

windows for a

conservatory – it’s

possible to design any glazing project that takes your design and usage

considerations into account.

Window frames

Understanding how windows are

made is an important part of

understanding what makes a good

window. Window frames are an

important part of the window –

not just structurally, but because

different materials and finishes

impact on the energy efficiency,

security and overall appearance of

the window.

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How are windows made?

Window frames are constructed by taking long lengths of ‘profile’, cutting them

to size, and fixing the ends together to create a rectangle (or other shape!).

Different materials are fixed together in different ways – timber windows can be

‘joined’ together with interlocking sections, whereas uPVC frames are welded or

fused together under high heat.

aluminum windows are ‘mechanically joined’ to replicate the same process as a

wooden frame, giving a more classic look. Better quality uPVC windows are now

made using a ‘smooth welding’ process, resulting in a seamless and more

polished finish.

Timber window frames & joinery

Timber windows are made by fitting together solid lengths of wood that have

been pre-cut and styled by machine or hand. Good quality timber windows are

made using engineered wood that has been layered and compressed to increase

the structural stability of the frame. Timber is naturally insulating, and the frames

don’t require any other materials or parts.

uPVC window frames & chambers

You might think that because timber frames are made from solid pieces of wood

that all frames are created in this way, but it’s not the case. Timber is a naturally

insulating material, but uPVC windows work by trapping air in pockets within the

frame, reducing thermal conductivity and stopping heat from escaping.

These are called ‘chambers’ – the more air chambers a window frame has, the

more energy efficient the window can be. This is because each chamber provides

an additional barrier for the heat and the cold to contend with. The outer frame

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and the sashes can each have a different number of chambers, but numbers can

range from a 3-chambered frame to a highly energy efficient 9-chambered frame.

Aluminum window frames & thermal barriers

You might have heard that aluminum window frames are ‘cold’ and not as

energy efficient as uPVC. Well, the problem with older aluminum

windows was that the profile could only be ‘extruded’ in one piece, meaning

window frames used to be made entirely from metal – the worst material

for letting the heat escape!

Over the years, advances in manufacturing led to windows being made in

two parts, allowing for a polyamide thermal barrier to disrupt the transfer of

heat. Like uPVC windows, aluminum frames also contain energy efficient

chambers.

When we talking about Aluminum Windows we mean the imported Profile

Like:

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Window frame styles

If you have a keen eye for detail, you’ll want to choose the right frame

styling and detailing for your new windows. Windows can have clear, sharp

lines or a softer, curvier outline depending on whether you choose beveled

or oval frames.

Another popular design choice is windows with ‘flush’ sashes, meaning that

windows sit completely flat, with minimal frame depth. You might want to

choose flush windows if you want to replicate the flat façade of traditional

timber frames, however these windows do not offer the weatherproof

qualities as regular frames. At the other end of the spectrum, ‘stormproof’

windows are designed so that the sashes overlap the frames, to protect

against the elements.

Period features

Like fashion, window styles have changed over time, and there are certain

features that can tell you what era a

window belongs to. Georgian windows are

overlaid with astragal bars that divide the

sashes into six over six panes, Edwardian

sash windows sported sash horns, and

1930s windows use arched frames to give

a property its style.

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Good window companies understand the differences between different

historical window styles and can advise you about which period features you

should consider, which is especially important if you live in a period

property.

Previously, you could only expect to achieve fine detailing with timber

frames, but it’s now possible to replicate this style using modern uPVC or

composite materials. Some uPVC frames are manufactured with a

‘woodgrain effect’ finish, which emulate the texture of timber.

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Window seals

Window seals, or gaskets, sit between the frame and the glazing to stop air

leakage and water ingress, resulting in a fully airtight and weatherproof

window unit. Gaskets keep your home warm and dry, saving your frames

from becoming damp and rotting. It can be easy to overlook the importance

of good quality seals, but they really do help the all-round performance of a

window.

Gaskets are pre-fitted to windows before installation, and with modern

windows you won’t need to add any additional draught excluding seals.

Three types of seal are needed to

make a window fully weathertight:

Window opener seals help

support the window all around

its edges

Outer weatherproof

seals prevent water from

getting in from the outside

Inner weatherproof seals keep

the window airtight and keep

draughts out of your home.

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Window accessories & fittings

Sometimes it’s the smallest features that make the biggest difference to

your window. Whether you’re after a sleek modern look or a sculptured

classical appearance,

the right frame

styling, handles and

other accessories

creates a superior

level of authenticity.

Handles

Window handles come with key locking

as standard and are usually available in a

range of colors and metallic finishes to

match the frame colour. Handles used to

have a ‘spur’ that wedged the sash shut,

but this feature is less common now that

key-handles are available.

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window furniture

The key to achieving an authentic-look sash window is in the furniture. Small

metal hook pulls sit at the foot of the sash, with sash fasteners locking the

window together.

Traditional weights and

pulley operated sash

windows also require a

hook on the wall in order to

fasten the cord.

Different eras have

different fashions, and it’s

no different with sash

windows. Professional

window companies will

know which sash window

fittings are meant for your

new windows.

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Traditional ironmongery

Modern windows can be made

to look exactly like their

traditional counterparts, right

down to the furniture. Ask for

traditional style handles, such as

monkey tail or tear drop handles.

Windows can also be decorated with peg stays – the period version of

modern-day friction stay hinges – that keep a window casement open at the

angle you want.

Locks, hinges & hardware

Your window will be constructed with different hardware depending on the

materials and how you want

the sashed to operate. The

important thing is that your

window company is using

quality locks, handles and

hinges that will keep your

window operational for years

to come, and will not fail.

Of course, there are other ways to accessories your new windows – these

include different frame colors (including two-color frames), decorative

glazing, and period features such as sash horns and Georgian bars.

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Window security

Installing secure windows in your home is important on a couple of fronts.

Firstly, strong frames and locks can protect your home against intruders,

significantly reducing the risk of break-ins and burglaries. Secondly,

restrictive window openings can create a safe environment, opening just

wide enough to ventilate a room without the risk of falling out.

The best way to compare windows’ security is to research their credentials.

Windows must achieve the British Standards certification PAS 24:2012 – the

minimum security standards required for residential properties. As of

October 2015.

Some windows also boast ‘Secured by Design’ accreditation, an initiative to

reduce crime through secure glazing.

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Internally beaded windows

Window glazing is held in place against the frame with a small strip called a

‘bead’ which runs along all the edges of the window sash.

Early uPVC windows had the option of external window beading, but this has

largely been dropped due to security concerns. Window beads used to be a

lot weaker and offered an easy opportunity for burglars to simply peel them

away and remove the glass.

Most windows nowadays have internal glazing beads (on the inside of the

window), which is the most secure option.

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Multi-point locking

There are many more options regarding locks than you might have first

thought, offering varying levels of safety and security.

Technically, a window with just two locking points can be considered “multi-

locking” but the more points that a window can be locked, the more secure

it is. There isn’t a standard number of mechanisms, but if you can find a

window that has

eight or more locking

points, you have

yourself an incredibly

secure window.

Bi-directorial locking

adds a layer of

complexity in the

frame that prevents

the intruder from

being able to jimmy

your window out of place.

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Key lockable handles

All modern window handles are key

lockable, which makes it infinitely

more difficult for potential intruders

to simply wriggle your windows

open. It also adds an extra safety

feature for top stores rooms

accessible by children and

vulnerable. It is recommended that

you leave your key inside the lock,

however, so you don’t need to look

for it in case of an emergency.

Egress hinges

Used for fire escape windows,

egress hinges allow a casement

window to open fully outwards

in order to provide a fire

escape.

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Opening restrictors

Opening restrictors limit how much a

window opens, either by connecting

the sash and the frame via a cable, or

by fitting key-lockable restrictors that

allow windows to open no more than a

couple of centimeters wide for

ventilation purposes.

The Royal Society for the Prevention of

Accidents reports that 4,000 children

under the age of 15 are injured falling

from windows every year – something

that could easily be prevented by using

window restrictors.

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Energy Efficient Windows

You’ve paid for your heating – it’s the job of your double glazing to keep the

heat in your home. Improvements in energy saving technology is arguably

one of the most significant developments over the past few years, not just

for the environment but for home comfort and money savings, too.

Up to a third of a home’s heat is lost through single glazing, and on average

upgrading to energy efficient windows can save around 20% in energy use.

Thermally efficient windows are at least double glazed, with low emissivity

glass, and an inert and non-toxic insulating gas like Argon between the

panes.

Combined with energy efficient frames, new double glazed windows can

achieve up to an A+12 Window Energy Rating (WER), and triple glazing can

achieve up to A+32. Upgrading your windows could save you up to 5000 L.E

on household bills every year.

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WER rating

The British Fenestration Rating Council (BFRC) created the WER rating

(Window Energy Rating) in order to simplify how effective a window is. The

rating system offers grades from A-G (with A being the best). If the window

is rated higher than an A it will

be followed by a number, and

anything above an A10

becomes A+. In October 2015,

the BFRC introduced the A++

rating for windows that achieve

higher than A+20. The highest

rating currently available within

the UK is A+32.

The WER rating is made up of three key elements: U value (low heat loss),

solar gain and air loss through ventilation.

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1. Thermal efficiency (U value)

A window’s U value is the technical way to measure heat loss through a type

of building material, such as a brick wall or tiled roof. U values are calculated

by the equation W/m2k, which measures heat loss in watts (W) per square

meter of material, when the temperature (k) outside is at least one degree

lower.

The lower the U value, the better the insulation provided by the material.

Single glazed windows have a typical U value of 4.8-5.6W/m²K, which means

that around 5 watts of heat are lost per hour, for every square meter of

window. Modern double glazing can achieve a U value as low as 1.4W/m²K,

and triple glazing is even more energy efficient, reaching 0.6W/m²K. This is

lower than the U value of an external wall.

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2. Solar gain (G value)

Solar gain is another factor that can boost a window’s energy rating. Not

only are windows now designed to stop heat escaping, but they can also let

heat in by capturing the sun’s rays. The idea is to capitalize on solar radiation

as a natural or ‘passive’ form of heating, reducing the dependence on

carbon energy to heat your home in the winter months.

The factors that influence the solar factor are the number of panes, the type

of gas between the panes, and also the type of coatings added to the

windows, as they dictate whether the glass absorbs or reflects the heat. It is

measured by the G value, on a scale between 0 and 1, with a high number

indicating high solar gain.

Contrary to what you might think, solar gain windows do not always lead to

overheating – the UK has a relatively cool climate and relatively little

sunshine, so overheating is rarely a problem! For rooms where sun streams

in during the afternoon, it could be worth considering upgrading to triple

glazing – the level of solar gain is actually less than double glazing, due to the

extra pane of glass and cavity.

3. Air leakage (L value)

Air leakage occurs when there is a weak point around the window frame,

such as the seals. Most modern windows are fully airtight, and should have

an air leakage factor or L-value of zero (0.00W/m²K).

Air leakage is not to be mistaken with ventilation. Ventilation is a controlled

system, letting in small amounts of fresh air to reduce stuffiness and

improve air quality, whereas air leakage will compromise the energy

efficiency of your window.

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4. Sound insulating windows

Upgrading to double or even triple glazed windows also has the benefits of

improving sound insulation in your home. The effect is like as moving a road

that’s just 5m from your home another 100m away – this means a quieter

and more relaxing living space, free from the noises of traffic from roads and

flight paths.

The same factors that increase a window’s energy efficiency also work for

noise cancellation: more panes of glass, Argon gas to fill the cavities and

airtight seals work together to give you more peace and quiet! You can even

get ‘silent sealed units’ with double-thickness glass that can cut noise down

by up to 36 decibels.

Can’t install double glazing in your property? If you’re restricted by

conservation planning rules, secondary glazing can also help to reduce the

noise from outside filtering into your home.

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Questions to ask before you buy new windows

Now that you know what makes a good window great, we advise you have a

think about your design preferences, the project requirements and the

impact on your home, before actively seeking to buy.

To help narrow down your search, ask yourself the following questions:

Question: How do I know if I need a new window?

Answer: The lifespan of a window depends on the quality of the product and

workmanship. A well-made and well-fitted window won’t have to be

replaced for decades.

Warning signs for needing to replace a window are:

1. Misted windows due to blown double glazed unit (failure of glazing seals)

2. Timber frames have warped or started to rot

3. Plastic has perished, is peeling or discolored

4. Windows rattle, or let in draughts and the cold

5. Sashes don’t open or close properly

6. Broken hinges, handles and locks

Another reason you might like to upgrade to better performing windows is if

you want to improve your home’s insulation, for example.

It’s common to experience these problems if your windows are over 20

years old. Sometimes it’s possible to repair a window, but like a car,

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replacement parts will only delay the inevitable – at some point the window

will need to be replaced.

Had your windows replaced recently? Alarm bells should be ringing. If you’re

experiencing these problems so soon, it’s likely that the window is faulty or

has not been installed correctly. It’s worth checking to see if you have an

active warranty (most companies offer a 10-year guarantee) or get in touch

with your double glazing installer to see if they are able to rectify the

problem or replace the damaged unit

Question: What color scheme will help set my home apart?

Answer: The majority of windows are replaced like-for-like, and for many

this means choosing white windows. However, modern windows are

available in the largest range of colors to date, and you’re not limited by the

material you choose any more: uPVC windows are available in natural wood

color frames, aluminum windows come in contemporary blacks and greys,

and both can be ‘dual colored’ for a different frame color inside and outside.

Heritage tones are surging in popularity, including Chart Well Green, Cream

Woodgrain and Anthracite Grey.

If you need more help choosing a color scheme for your windows, ask your

advisor for advice tailored to your property

http://www.everest.co.uk/double-glazing-windows/windows-buying-guide/

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Question: How important is window security?

Answer: Up to a third of burglaries in a home occur through a window. This

could involve smashing the glass (single glazed windows are particularly easy

to break), removing external frame beads to simply lift the glass out, or

levering open the sash. A window is only as secure as its weakest part –

ensuring the frames, hardware and glazing all work together to prevent

entry is fundamental for your home’s security.

Good windows have multi-point locking, a key lockable handle and strong

frames and hinges. A simple way to check for enhanced security credentials

is by assuring that they have been certified to PAS 24:2012. Another tip is to

hide your valuables from view with curtains or blinds!

Around 15% of burglaries don’t involve any kind of forced entry, with

intruders climbing through an open window or door. It’s important to

remember to keep windows shut and locked when you’re outside of the

room, but if ventilation is important, consider tilt-in windows that only leave

a small opening

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Question: Do I have an obligation to retain the look of my property?

Answer: If you live in a listed building, conservation area or your house has a

restrictive covenant, you’ll need to follow certain guidelines to ensure your

new windows are “in-keeping” with the surrounding area.

Houses in conservation areas are subject to ‘Article 4 Directions’, which

restrict the work that you can do to the outside of your property, without

first getting planning permission. If this is the case, it’s often simpler to find a

company with previous experience of getting windows accepted in

conservation areas. Ask your window company for details of previous

projects that have been accepted by Planning Officers.

Other than these legal necessities, it’s up to you what style, color and glass

designs you want for your windows

Question: How do I find out if I live in a conservation area?

Answer: Conservation areas are in place to protect architectural and

historical buildings or places of interest, and are more common for

properties built before the turn of the 20th century. However, it’s always

worth checking before going ahead with a home improvement –

homeowners who go ahead without planning permission may be required to

pay again for a more sympathetic upgrade.

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Question: Should I go for a traditional or contemporary design?

Answer: Unless your house has a legal obligation to retain its appearance,

it’s your choice. Many people choose a traditional design to fit with their

home’s appearance, but in some circumstances modern, slim frames can

actually enhance the aesthetics of a property.

Get inspiration by browsing picture galleries and searching for similar

properties to your own. If you’re totally stuck or need some advice, get in

touch with a home improvement expert who can help you choose windows

that suit your home

Question: Which window material is the easiest to maintain?

Answer: Modern, high performance windows should last for decades to

come, needing only minimal maintenance. Some window parts now come

with lifetime guarantees, meaning that you will never need to worry about

plastic frame discoloration or misted windows.

uPVC frames are practically maintenance-free, and only require cleaning

occasionally by wiping down the frames with a damp cloth. Timber windows

can be cleaned in the same way, but will also need to be recoated using

microporous paint or stain every couple of years, when necessary.

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Question: Can installing new windows save money on energy bills?

Answer: One way to make your house more energy efficient is to upgrade to

better glazing. Single glazed windows lose a house up to a third of its heat

through the panes, meaning if you still have single glazing, you could save a

small fortune – up to 5000 L.E every year – just by upgrading your windows.

Of course, the potential amount you could save on energy bills depends on

the energy rating of your current windows, and how well they’re

performing.

Question: What is the energy rating of my new windows?

Answer: Energy ratings for windows are often calculated by two different

systems – Window Energy Rating (WER) and U values. WER ratings are

presented on a simple A++ to G scale, to make it easier to compare windows

across the board. U values make up part of this rating, and they are the

technical way to measure heat loss.

You can ask your window company for both these specifications when

deciding on a new window – they should be able to show you an ‘energy

license’ for the product. Average double glazing achieves around a C rating,

but superior windows can achieve up to A+12. Triple glazed windows can

reach a high of A+32.

It’s worth noting that the energy efficiency of a window is only as good as its

installation – a poorly fitted window with gaps around the edge can leak

heat and create draughts. That’s why it’s important to choose a company

that makes your windows to measure, so that they fit the aperture perfectly,

and properly seal the perimeter.

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Question: What kind of guarantee do the windows come with?

Answer: It’s important to make sure your new windows are guaranteed for a

number of years after installation, for your peace of mind in case something

goes wrong. Any prospected company must give a guarantee or warranty

that ‘covers the cost of completing rectification work in respect of defects

for a period of 10 years’.

Better windows often come with better guarantees – look for a double

glazing company that offers more comprehensive cover, including

guarantees against foggy glazing, discolored frames and faulty parts. Some

companies even offer lifetime guarantees, with the option to transfer the

warranty across to future home owners.

Make sure that you’re provided with the relevant documentation and

information for how to claim in the rare case that you may need to.

Question: Is it possible to make custom shaped windows?

Answer: Any good double glazing installer will survey your property and

precisely measure up for new windows before giving you a quotation,

meaning that every window or glazing product you buy should be made to

measure your home. Most installers can make or order windows in any size

and shape, depending on building regulations, including circular, arched top,

apex or triangle shaped, or angular windows. Simply ask your local

representative during your design consultation.

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Question: How do I know if a window company is any good?

1. Accreditations

There are many industry renowned federations and bodies who take great

efforts to ensure that the best window companies are easily identified.

2. Experience

A long trading history and good reputation are good indicators of a stellar

window company. Focus on the company’s reviews and satisfaction ratings.

Ask to see examples of recent work, including customer testimonials and

installation pictures, to make sure they are confident with undertaking

similar projects to yours.

It’s also worth asking about the professional experience of the team – does

the company have dedicated and experienced advisors, surveyors, installers

and project managers?

3. Recommendations

If you’re stumped about where to start, talk to people you know and trust

about any personal experiences they may have had. That will give you a

good idea of the level of service that different businesses offer.

Question: How do I get an opinion from an expert I can trust?

Answer: Friends and family are a great starting point when getting advice

about buying windows, and TV, magazines and the internet are limitless

sources of inspiration. But nothing beats seeing the options laid out in front

of you, with samples so you can get a feel for the windows themselves.

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Before you buy, see if any of the companies you like offer a no-obligation

consultation service. If they do, there is nothing to lose by arranging an

appointment, which will give you some face-to-face time with an expert.

Question: Do you install where I live?

Answer: Narrow down your list to companies who actively install in your

area. Not only will this save you time in your search, but you can be

confident that they have experience with similar house styles.

Typically, you can expect to have your new windows installed about 4-6

weeks after ordering, but the wait time is different with every company. This

can be due to a variety of factors, including manufacturing complexity and

arranging any planning permission, as well as popularity of the company and

seasonality. As long as the company is responsive and communicates at

every step of the process, it is the sign of a good service.

The time it takes to install a window depends on how many windows and

other home improvements you’re having installed at the same time. A single

window can take anywhere from 3 hours to install, to a day for a full house

of windows. Your window company will be able to give you an estimated

installation time when booking the installation date.

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Question: Does the window company offer aftercare, such as call outs and

repairs?

Answer: Even if you’re confident you’ve chosen the best glazing company

and best quality window, it’s good to know that you can call on your

installation company again at any time. Whether you want advice

about looking after your windows or troubleshoot any problems, it’s a relief

to know the full service is available to you.

Ask about their aftercare service, and whether they offer callouts and free

repairs if anything goes wrong. It’s unlikely you’ll need to use such services,

but it’s a shrewd idea to check beforehand.

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References:

British Standard Institute (BS 6375-3:2009+A1:2013)

Performance of windows and doors. Classification for additional

performance characteristics and guidance on selection and specification

http://www.researchandmarkets.com/reports

www.bre.uk

www.recovinyl.com www.vinylplus.eu www.schueco.com

www.milgard.com

http://www.todayshomeowner.com/

http://aladdininsulation.com/

https://www.rehau.com/

http://www.researchandmarkets.com/reports

http://www.bre.uk/

http://www.recovinyl.com/

http://www.vinylplus.eu/

http://www.schueco.com/

http://www.todayshomeowner.com/

http://aladdininsulation.com/

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Thanks For your Interesting and Reading first edition for “windows Buying

Guide” . Please Follow us for second Edition Soon For “Door and More”.

Eng. Mohamad Alattar

Founder and Marketing Director

Smart Window

January 2017

Window buying guid ( 1st edition)

Real Estate

Transcript of Window buying guid ( 1st edition)