1 Retrofit GreenDeal · 1 1 Advance Warning • The GreenDeal may not even happen • But...

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Retrofit RetrofitGreenDealGreenDeal

R 3 ( ith f db k)Rev 3 (with feedback)Rewards, Rational, Rhetoric, , , ,

Risks & Risk Management 1

This & contained presentations

• Scribd: www.scribd.com/brianspecman• > collection > • SusCon Retrofittingg• http://www.scribd.com/collections/2401889/SusCon-Retrofitting

• Refurbishment• http://www.scribd.com/collections/2426007/Refurbishment-See-

also-SusCon-Retrofitting

• SMARTLife Hive• SMARTLife Hive• http://www.scribd.com/collections/3311795/SMARTLife-Hive-Low-

Carbon-Centre

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Advance Warning

• The GreenDeal may not even happen• But Government has no choice• Its written into law alreadyy• Targets have to be met• Fines will be dished out• Fines will be dished out• The GreenDeal we end up with is likely

to be like this but the details may varyto be like this, but the details may vary.

03/11/2011 © NGS GreenSpec 2010 BrianMurphy 5

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Retrofit:Retrofit:RewardsRewards,

Rational, Risks,7

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Rewards

• 3000+ properties refurbished per day• survey & design requirements• More companies neededp• Large work force needs to be trained

– Training of a new workforceTraining of a new workforce– Up-skilling of existing workforce

• No more compromisesp

• Long term employment to 2050– And probably beyondAnd probably beyond

03/11/2011 8

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Rationale

• DriversCarbon reduction– Carbon reduction

• for human survival on our only planet• CRC non-domestic buildingsCRC non domestic buildings• Green Deal 2012

– Financial Mechanism• Golden Rule

– Delivery system• Supply chainSupply chain

– Competency• Standards• Training and education• Training and education• Approved players and parts 9

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Risks

• Inadequate survey– Using limited knowledge & guesswork– Bats & Birds not expected

• Lack of understanding of physics– Poor design & choice of materials

• Interstitial or surface condensation– Mould: asthma– Toxic mould

• Death by Insulation

• Destruction of Historic Fabric03/11/2011 10

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R t fitRetrofit:GreenDealGreenDealRewardsRewards

11

RetrofittingP ti l T lkitPractical Toolkit

for Architectsfor Architects Rev 5 %%%

RIBA South/South East, SusCon, , ,SEEDA, ESF, BSSP; GreenSpec and ech2o2010 Programme Sustainable Construction

1


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UK housing stock

• 6.6 million properties solid walled and ‘hard to treat’

• 9.2 million properties ‘hard to treat’ p p• 27% of the carbon generated


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UK Carbon Targets

• Climate change Act 2008– 34% reduction by 2020– 80% reduction by 2050

• 7 m retrofits needed by 2020– 80% improvements in energy efficiency

needed


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Delivery?

• £23 bn/annum spent on maintenance• Very little on energy efficiency• 15% by 2050 at current rate of deliveryy y• 700,000/annum properties need

upgradeupgrade• Last year

20 000– 20,000– And lots of exemplars and trials


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Scale of activity

• 14 million UK homes could benefit from insulation under the Green Deal.

• Potential spend: £ tens of billionsp• Energy efficiency sector• investment confidence• investment confidence • job opportunities.

could stimulate economic recovery?• could stimulate economic recovery?

03/11/2011 16

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R t fitRetrofit:GreenDealGreenDeal

RhetoricRhetoric 17

Energy Minister Chris Huhne

• "Energy saving is the cheapest way of closing the gap between demand and supply, yet it is the Cinderella of the energy ball,“

• "To date we have heard too much talk and too little action.” on energy efficiency”

• “Improved energy efficiency needs to beImproved energy efficiency needs to be made a desirable prospect for every householder like broadband or satellitehouseholder, like broadband or satellite TV”

The Green Deal

• A completely new and ambitious approach to home insulation and energy efficiency.

• It will make it easier for householders to make improvements, without the pain of investment.

• The aim is that every participating householder will save money by insulatinghouseholder will save money by insulating their home

• You wont have to choose betweenYou wont have to choose between improved bathroom, kitchen or insulation

Fuel Poverty or Fuel Poor?

• A complimentary part of GreenDeal is aimed particularly at those living in fuel poverty or with low incomes.p y

• ECO Energy Company Obligation• energy efficiency had the potential to• energy efficiency had the potential to

offer real carbon-cutting gains for relatively little investmentrelatively little investment.


Joined up commerce

• "Energy companies and high street stores will help guide customers through a simplified process and pay g p p p yfor the work upfront.

• Householders will then pay back over• Householders will then pay back over time on their energy bills from the energy savings they make “energy savings they make.“


Joined up communities

• energy companies & local authorities• team up to promote more efficient home

refurbishment plans,p ,• Larger numbers leaning on economies

of scaleof scale."Insulation measures are often cheaper if implemented a street at a time “if implemented a street at a time,“


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RationalRational 23

The Green Deal (GD)

• UK government initiative to kick-start:– extreme energy efficiency refurbishment– extreme energy efficiency refurbishment

revolution• For homeowners and businesses

– that can afford their energy bills• Upgrade with no up-front cost.

capital cost interest charges and– capital cost, interest charges and overheads

– recouped over a period of time through the p p gresulting savings on the buildings energy meter(s) bills.

• The repayments and savings remain with• The repayments and savings remain with the building not the occupier

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GD Provider

• Package deal offered by i t fi l lprivate firms or local

governmentg–E.g. B&Q, M&S, local authorities,

energy company.energy company.• One point of contact

–One contractual relationship–One contractual relationship–Arrange GD Accredited advisor

Arrange GD Accredited installer–Arrange GD Accredited installer

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GD Plan

• financial and contractual agreementbetween the GD Provider and Improver– between the GD Provider and Improver

• Scope of work– recommended by GD Accredited– recommended by GD Accredited

Adviser– undertaken by GD Accredited Installer.undertaken by G Accredited Installer.

• Specifies the total cost, – the charge to be attached to the g

energy meter– length of the repayment period

C l i ith th G ld R l– Complying with the Golden Rule

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GD Improver

• Householder business or organisation whose property is being improvedbeing improved.

• Chooses from recommended energy improvement opportunitiesopportunities

• Has one contract with the GDProvider

GD Accredited Advisor

• assesses the property• recommends energy saving

opportunitiespp– from a list of GD Approved measures.

• Might also make recommendations on• Might also make recommendations on energy-saving behaviour.

GD Approved measures

• Must save energy or generate energyH t P• Heat or Power

• On approved listsECA E P d t– ECA Energy Products

– MCS lists• Known life expectancy• Known life expectancy• Must have a payback within 20-25 year

Golden ruleGolden rule• Emphasis on ‘Fabric first’

insulation airtightness thermal breaks– insulation airtightness, thermal breaks– EcoBling later

GD Accredited Installer

• Specialist installing the p gmeasures

recommended by the GD–recommended by the GDAccredited Advisor

• They could be:employees of the GD Provider–employees of the GD Provider

–or be an independent psubcontractor.

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The Golden Rule

• The expected financial savings from the t b l t tmeasures must be equal to or greater

than costs attached to the energy billi l di l b d– including: measures, labour and financing costs

l th f th t i d• length of the payment period– should not exceed the expected

lifetime of the measures.– Nominally 20-25 years

• Fabric first, EcoBling second

Energy Company ObligationEnergy Company Obligation (ECO)(ECO)

• Government driving uptake of energy efficiency measures:efficiency measures: – Carbon Emissions Reductions Target

(CERT) and( )– Community Energy Saving Programme

(CESP).• Expire at the end of 2012• Expire at the end of 2012,

– replace by ECO.• Restructured:Restructured:

– up to date and work with Green Deal. • The ECO focuses on households who

d fi i l tneed financial support– Fuel Poverty (10% of income)

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GreenDealGreenDealDeliveryDelivery

hMechanism03/11/2011 © NGS GreenSpec 2010 BrianMurphy 33

Green Deal Code of Practice OFT

UKAS (approved standards)

Product Requirements

UKAS (approved standards)

BSI PAS

Green Deal Provider Licence

Assessor standards

Green Deal

Performance Specification

Manufacturers

BSI PAS

2030

GreenDeal

Green Deal Provider

Assessment Surveys

Certification

Approved Products

Manufacturer Approved

GreenDealInstaller

Certification

Manage Process

Provide customer Body

Accredited Advisors

Approved installers

Golden Rule

Body

Accredited Installers

Service

GuarantorAdvisors

Domestic Assessors

Pay for itself within 25 years

Installers

Signed off installations

Development Control

Commercial Assessors

y

Product Warranties

Installation Warranties

Professional Indemnity Insurance

SWIGA or CIGA

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GreenDealGreenDealStallingStalling

h ?Mechanism?03/11/2011 © NGS GreenSpec 2010 BrianMurphy 35

Development Control

T&C Planning Permission

Listed Building Consent Building Control

Permitted Development Conservation Areas Extending part

EcoBling Conservation Officers Altering part

Full Applications Postcode lottery Requires upgrading more

Postcode lottery Outside and in Limited scope of interest

System under stress Protective of historic fabric Limited scope for judgement

03/11/2011 © NGS GreenSpec 2010 BrianMurphy 36Using delaying tactics Limited permitted activity Limited expertise with old building extreme upgrades

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OpportunitiesOpportunities37

1

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www.capem.eu15/03/2011 © NGS 2006 Title 1

RefurbishmentSurveys, Tests

& A l& Analysis1


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Opportunities

• Competent, accurate, thorough surveysT ti f i ti• Testing of existing– Airtightness, IR Thermography

Analysis of all survey information• Analysis of all survey information• Through understanding of the existing

S ft l i• Software analysis• Design the proposal

A i t h th d• Appropriate approach, methods materials & technologyWh l H Pl Fi l t t• Whole House Plan: Final state– Phased development/room by room

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RisksRisks 40

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Risks

• Inadequate survey– Using limited knowledge & guesswork– Bats & Birds not expected

• Lack of understanding of physics– Poor design & choice of materials

• Interstitial or surface condensation– Mould: asthma– Toxic mould

• Death by Insulation

• Destruction of Historic Fabric

Risks: Inadequate survey

• Inadequate surveyor– Using limited knowledge & guesswork– Energy Performance Certificate (EPC)– EPC have shown how bad this can get

• Limited access to tools– Limited extent of surveys

• Bats & Birds not expectedp– Tell tale signs missed– Difficult to detect unless a BAT expertp

03/11/2011 42

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Risks

• Assumption: – About existing construction– About existing insulation measures

• Inaccurate:– Guesswork on thicknesses – based on normal construction

• Estimation– About benefits of improvements

• Inappropriate proposalsInappropriate proposals03/11/2011 © NGS GreenSpec 2010 BrianMurphy 44

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Risks: Bats

• Protected species– Avoid £5000/bat fines

• Avoid changing roof or wall conditions– temperature/humidity/air flow/light level

• Avoid excluding batsg• Avoid entrapping / entombing bats• Avoid replacing bituminous felt• Avoid replacing bituminous felt

– BRM Breathing Roofing Membranes• Avoid replacing sheathing boards• Avoid replacing sheathing boards

– BRM Breathing Roofing Membranes 45

Bat DetectionBat Detection techniques include:techniques include:

• Sign surveys:– Faeces and urine particularly at roost entrances.

B t f l k lik d i b t i d d– Bat faeces looks like mouse droppings but is dry and powdery, containing insect exoskeletons

• Food remains; – with some species the wings of butterflies moths and other– with some species the wings of butterflies, moths and other

food may be found• Visual location:

– bats may be seen at dusk and dawn entering and exiting y g groosts, but many bats are timid and may not be seen

• Audible location:– some bats emit audible social calls

• Building occupants;• Building occupants; – often building occupants are aware of bats and may provide

useful data• Ultrasonic location:Ultrasonic location:

– detectors are available which make the inaudible ultrasound emitted by bats as echolocation audible to humans03/11/2011 46

Lack of understanding ofLack of understanding of physicsphysics

• K, R, E & U valuesCondensation checks• Condensation checks

• Decrement delay• Hygroscopicity over time• Hygroscopicity over time• Hydrophobicity over time• Capillary attraction• Capillary attraction• Moisture transport• Thermal movement over time• Thermal movement over time• Hygro-thermal moisture movement• Thermal massThermal mass• Cavity or Contact 47

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Poor design

• Not using a designer or software• Not understanding the existing

– Guesswork• Not understanding the physics• Not understanding the materialsNot understanding the materials

– Limited pallet not able to make right choice• Not applying the knowledge• Not applying the knowledge

– Compromise


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Analysis

• U value• Condensation check (static) BS 5250 • Heat and humidity transports (dynamic) y p ( y )

to BS EN 15026• WUFI:• WUFI:• Computer assisted simulation

programme for heat and humidityprogramme for heat and humidity transports (dynamic) to BS EN 15026

• www.wufi.de

Interstitial or surfaceInterstitial or surface condensationcondensation

• Inadequate performance:– Conventional materials

• performance diminished when moist

M ld th• Mould: asthma• Toxic mould: ‘Death by Insulation’• Condensation, spores, wet or dry rot• Vulnerable structure: early failure,Vulnerable structure: early failure,

– Rotting timber– Frost damaged masonryFrost damaged masonry

03/11/2011 60

Changing Historic Fabric

• Moisture permeability• Both internally and externally• For summer and winter conditions


Risks: Historic fabric

• Must permit it to continue to breathMoisture flow from ground to wall surfaces• Moisture flow from ground to wall surfaces

• Moisture flows from inside to out and visa versaversa

• Heat flows from inside to out and dries the fabricfabric

• Adding insulation cools the outer face and make it vulnerable to frost damagemake it vulnerable to frost damage

• Avoid risk to historic fabric– Add insulation to avoid internal condensationAdd insulation to avoid internal condensation

risk and no more– Avoid mould growth inside

03/11/2011 63

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Risks MethodsRisks Methods 66

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Mechanisms

• Rain and other precipitation cools buildings• Sun’s rays heat the building externallySun s rays heat the building externally• Solar gains through windows heat internally• Exposed thermal mass can absorb heat from

solar gainssolar gains• Evaporation draws heat from building

– Condensing can put heat back ing p• Heat flow dries fabric

– Absence of heat: the fabric cools• Moisture and coolth can lead to frost damageMoisture and coolth can lead to frost damage• Spores are ever present• Moisture, spores and coolth can lead to mould

growthgrowth• Mould can lead to ill-health and death

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Approaches

• External insulation: – wraps up thermal masswraps up thermal mass– heat keeps fabric warm – minimises thermal bridges

Insulate cavities:• Insulate cavities:– inadequate insulation

• Internal insulation:Internal insulation: – separates thermal mass from heating– cools the external fabric

stops heat flow from drying external fabric– stops heat flow from drying external fabric– external fabric vulnerable to frost– internal fabric vulnerable to mould

C bi d i l ti E t / C it / I t• Combined insulation: Ext +/- Cavity +/- Int– Risk of interstitial condensation

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Barriers & Risks

• Planner & Conservation officer dictate– Ornate and historic façade and/or interiors– Prevent some buildings being insulated

Prevent details changing so cant insulate• Cavities invented to ventilate & keep

external moisture in cavity & drain it out– Filling them removes those functionsg

• Solid walls traditionally were moisture permeablepermeable– Insulation can change their permeability03/11/2011 72

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Complications

• Every building type/era is different– Construction, materials, breathability– Ventilation, windows, fireplaces– Services

• Every occupier has different habits:– Heating, cooling and ventilation– Water use, cooking and bathing habits– Care for the building fabric– Money to spend on all of the above– Understanding of their impacts

73

How do you choose

• Guesswork v Analysis• GreenDeal Approved Advisors

– Trained but in conventional thinking• or better?

• GD Approved Measures• GD Approved products

– Limited pallet p– Will they solve all the problems?– CESP & CERT approved measures will notpp

03/11/2011 74

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Retrofit:Retrofit:GreenDealGreenDeal

RisksMaterialsMaterials

75

Choice of material properties

• Trapped air: – insulation k and R valuesinsulation k and R values

• Open celled: – moisture and heat permeable, open, breathing,

• Closed cell:• Closed cell: – Moisture and heat resistant

• Lightweight open materials:I l ti k d R l– Insulating k and R values

– Easy air movement through• Dense materials:

Sl h h– Slow air movement through– Thermal mass and Decrement delay

• Surface resistivity: y– Resists some heat from being drawn out of surface

76

Choice of materials

• Air spaceMineral wool• Mineral wool

• Expanded or extruded Foamed plastic• Sprayed foaming plastic• Sprayed foaming plastic• Cellular glass• Cellular mineral• Cellular mineral• Aerogel• Plant based• Plant based• Cellular mineral• Calcium SilicateCalcium Silicate• Multifoil

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Airspaces

• Trap air– Hold spores

H ld i t– Hold moisture vapour– Hold VOC and other air pollutants

• Can be ventilated– To remove moisture vapour– To remove moisture vapour– Facilitate wind washing to blow heat from surfaces– Increase air/wind leakiness

• Fluctuate in temperaturep– Can draw heat from surfaces – Can warm surfaces

• Can be a route for thermal flanking/bypassCan enable Eddie currents and stack effect– Can enable Eddie currents and stack effect

– Can be a place for heat to dissipate• Provide acoustic isolation• Can separate inside from outsideCan separate inside from outside

– Prevent capillary attraction (if wide enough)– Prevent moisture transport

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Surface emissivity

• Outer and inner faces– of walls, roofs, floors

• Ability to absorb or release heat• Zone outside of face

– is part of this propertyp p p y• Emissivity level

– depends on the material at the surfacedepends on the material at the surface– Reflective foils can reduce some heat loss– Steel trough formwork to concrete floorSteel trough formwork to concrete floor

• Prevents exploitation of thermal mass 80

Low emissivity surfaces

• Foil face– E.g. Aluminium, Aluminised polyethylene

• Low radiation from surface• Heat reflection back inwards• Need air space adjacent to them to beNeed air space adjacent to them to be

effective• Probably needs space both sides• Probably needs space both sides


Stone slag and glass mineralStone, slag and glass mineral wool:wool:

• Hydrophobic– Performance diminished when moist

• MOR k values• Open pore

– Moisture permeablep– Air permeable– Wind washing vulnerable g– Heat permeable


Expanded or extruded FoamedExpanded or extruded Foamed plasticplastic

• Not moisture permeable• Not moisture absorbent• Closed cell• Good k values• Foil faced: low emissivity• Foil faced: low emissivity• vapour barriers essential in vulnerable

constructionconstruction– Timber is vulnerable construction


Sprayed foaming plastic

• Good airtightness• Not moisture permeable• Can entomb nature• Can rot timber


Sprayed permeable foamedSprayed permeable foamedplasticplastic

• Good airtightness• Moisture Permeable• Won’t rot timber• Can entomb nature


Cellular ‘foamed’ glass

• Strong, loadbearing• High decrement delay• Poor k values• Moisture resistant• Vapour resistant• Vapour resistant• Should be protected by membranes

Frost vulnerable: Saturation possible• Frost vulnerable: Saturation possible


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Cellular mineral:

• medium decrement• medium thermal mass• Closed cell• Airtight• Thermal bridge by mortar joints• Thermal bridge by mortar joints• Low moisture absorbency/permeable

E g AAC Autoclaved Aerated Concrete• E.g. AAC Autoclaved Aerated Concrete• Load-bearing


Extruded fired mineral

• Fired clay cellular block• Extruded: hollow cells hold air still• High decrement: Long path through cell g g p g

walls• High thermal mass at surface• High thermal mass at surface• Thin bed joint: negligible heat loss

Air leaky purpends need airtight coating• Air leaky purpends need airtight coating


Extruded cellular mineral

• Lime binder• Lightweight insulating aggregate• Extruded: hollow cells hold air still• Medium decrement: Long path through

cell wallscell walls• Medium thermal mass at surface

Lime mortar: neutral joint heat loss• Lime mortar: neutral joint heat loss


Aerogel

• Excellent k value (better than plastics)• Moisture permeable• Moisture mass• Decrement delay• E g Spacetherm• E.g. Spacetherm


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Plant based:

• Hygroscopic,• Moisture permeable• High or low densityg y• Rigid: spanning• Soft: squeezing• Soft: squeezing• high decrement delay

Good acoustic insulation• Good acoustic insulation• Long fasteners needed: available in UK


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Calcium silicate:

• Open cell, • lightweight, • Moisture permeable, p ,• Moisture transport• decrement• decrement


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Multifoil:

• Low emissivity (theoretical calculations)N d i b th id• Needs air spaces both sides

• Poor k value (optimistic literature)N th l• No thermal mass

• No decrement delayV i t t ( i d b tit hi )• Vapour resistant (pieced by stitching)

• Reflective: need PPE sunglasses• Use where architect or conservation

officer prevent anything else• Don’t use on their own

93

Application of insulation

• Correct size & quantity for applicationAvoid excessive compression– Avoid excessive compression

• Accurate sizing to fit– Airtight no gaps corners abutmentAirtight, no gaps, corners, abutment, – No compromises

• Correct edge profileg p– Sealed abutted– T&G jointed

Off t l d & 90 d l• Offset lapped & 90 degree layers– minimise thermal bridging

• Cross battens to minimise bridging• Cross battens to minimise bridging• Avoid metal fasteners & adhesives

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Retrofit:Retrofit:GreenDealGreenDealRisks Other

MaterialsMaterials 95

Supporting materials

• Vapour barriers• Breather membranes• Breather membranes• Airtightness layer• Wind tightness layerg y• Breathing Sheathing Board• Breathing Roofing Membranes

M h ( ti i l ti )• Meshes (supporting insulation)• Multifoil Breathing Roofing Membranes• Damp proof membranes• Damp proof membranes• Damp proof but vapour permeable

membranes• Gas proof membranes• Drainage and trickle layers

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Vapour barriers

• Used inside of insulation/construction– Used with Breather Membranes outside

• Vapour resistant– Vapour check if inadequate

• Leaks are inevitable– Leaks can be harmful– Sealing leaks is exceptionalg p

• Compromise is unacceptable


Breather membranes

• Used outside of insulation/construction– Used with vapour barriers inside

• Walls or roofs– Weather protection (until covered)

• Vapour permeablep p– Can be ‘intelligent’ properties vary with

atmospherep• Traditional bitumen impregnated fibre

– Few is any bats trapped in fibresFew is any bats trapped in fibres

Airtightness layer

• Used inside of insulation/construction– Used with wind tightness layer outside

• Materials:– Some paper and cellulose– Some polymer

• Vapour permeable• AirtightAirtight• Can be intelligent:

– variable properties with atmospheric– variable properties with atmospheric conditions03/11/2011 99

Wind tightness layer

• Used outside of insulation/construction– Used with air tightness layer inside

• Materials: polymeric• Vapour permeable• Wind tightWind tight• Weather resistant• Can be roofing underlay often is• Can be roofing underlay often is


Breathing Roofing Membranes


• Vapour permeable• Wind tight• Weather resistantWeather resistant• Currently under BCT investigation

– Research ongoing– Research ongoing– So far all risk bat entanglement/entrapment


Breathing Sheathing boards


• Vapour permeable• Wind tight• Weather resistantWeather resistant• Can be thermally insulating• Can be acoustically insulation• Can be acoustically insulation• Can eliminate thermal bridges

th h t t l f i– through structural framing

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Meshes

• Can exclude insects• Used to support insulation• Were recommended

– for bats to hang from in place of BM or BRM– Can entangle bats and birdsg– No longer recommended


Multifoil Breathing RoofingMultifoil Breathing Roofing MembranesMembranes

• Used outside of insulation/construction– Used with vapour barriers inside

• Vapour resistant but punctured by stitching so vapour permeable

• Wind tightWind tight• Weather resistant• Can be thermally insulating• Can be thermally insulating• Can be acoustically insulation


Damp proof membranes

• Ground water resistant• Ground vapour resistant


Damp proof but vapourDamp proof but vapour permeable membranespermeable membranes

• Ground water resistant• Ground vapour resistant when wet• Not Ground vapour resistant when dryp y• Not Ground gas Radon Methane

resistantresistant


Damp/Gas proof membranes

• Ground water resistant• Ground vapour resistant• Ground vapour resistantp• Ground gas Radon Methane resistant


Drainage and trickle layers

• Allows water downwards• Resists ground water upwards• Wont stop water table risingp g• Not ground gas resistant• Not flood resistant• Not flood resistant


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Retrofit:Retrofit:GreenDealGreenDeal

Risks FinishesFinishes

109

Finishing materials

• Gypsum plaster and skim• Cement render• Lime render• Clay render


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Gypsum

• Plaster or skim• Insulating normally• Dense versions available• Moisture resistant• Low absorbency• Low absorbency• No moisture transport

Needs to be removed if insulating• Needs to be removed if insulating internally


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Cement Render

• Internally• High Thermal mass • Decrement delayy• Closed• moisture resistant• moisture resistant• Condensation risk high

Needs to be removed if insulating• Needs to be removed if insulating internally


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Cement Render

• Externally• Strong• Weather excludingg

– Drying shrinkage cracks lets it in • Closed,Closed,• Moisture resistant• Traps internal moisture• Traps internal moisture• Never apply over historic fabric


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Lime render

• Externally• Soft and weak• Moves with soft weak back groundg• Less likely to crack• Moisture permeable open• Moisture permeable, open• Slow set, carbonation

Breathing• Breathing• Anti septic, anti moulds


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Lime Render

• Internally• Moisture permeable, open• Slow set, carbonation,• Breathing• Moisture mass• Moisture mass• Low condensation risk

Anti septic anti mould• Anti septic, anti mould


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Clay plaster

• Moisture permeable• Dries but not set: easy to repair• Breathingg• High Moisture mass• High density• High density• High decrement

Low condensation risk• Low condensation risk• Absorbs radiation• Absorbs smells

03/11/2011 117

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Decoration

• Oil based• Micro-porous stains & paint• Lime wash• Clay based finish


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Oil based

• Skin forming• Traps moisture• Moisture resistant• Barrier to vapour• Condensation resistance needed• Condensation resistance needed• Mould resistance needed

Use on inside of external joinery• Use on inside of external joinery


Micro-porous stains and paints

• Weather resistant• Vapour permeable• Breathingg• Use on outside of external joinery


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Lime wash

• Moisture vapour permeable• Anti-septic• Use inside or outside of vapour p

permeable construction• White but also available with colour• White but also available with colour


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Clay based

• Moisture permeable• Breathing• High Moisture massg• High density• Decrement• Decrement• Low condensation risk

Absorb radiation• Absorb radiation• Absorbs smells• Available with mineral colours

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Insulating paints

• MPs ambition!• Wishful thinking?• I have never seen any literaturey• I have seen no evidence to support any

claimsclaims• Low condensation risk?

Low emissivity?• Low emissivity?


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Risk ManagementRisk Management 124

Delegate’s ProposalDelegate s Proposal and my reactionsand my reactions

• Risk Management:Go ahead with unproven solutions– Go ahead with unproven solutions

• but monitor and inspect • Inspection access compromises integrity

– Go ahead but make it undoable• Like EA’s Sacrificial Construction in flood plains

– Don’t do it to too manyDon t do it to too many• Too many to correct if it goes wrong• People have to live in your experiments

and put up with your error correcting exercises– and put up with your error correcting exercises– Do many different experiments

• to a few buildings at a timeD d t d d i d t t thi t– Do understood, designed, competent things to many buildings at the same time

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F ll UFollow UppAspire to becomeAspire to become

what you desire to appeardesire to appear


Follow Up:Follow Up: manufacturer/suppliersmanufacturer/suppliers

• BSI KM, BBA Cert, ETA, Euro Agrément• Understand your products better than you doUnderstand your products better than you do • ISO 9000 QA• ISO 14001 EMAS• BES 6001 Responsible Sourcing• BES 6001 Responsible Sourcing• BSI PAS 2030 (Public consultation now)• Manufacturer Approved Installer system pp y• GD Approved

– Measure or Materials– MCS Approved productsMCS Approved products

• ECA: WTL or ETL• GreenSpec PASS• LCA & EPD:• LCA & EPD:

– GreenSpec EPD or BRE EP03/11/2011 127

Follow Up: Installers

• ISO 9000• ISO 14001• BSI PAS 2030 (Public consultation now)( )

– Scrutinise the details– Challenge Green Deal if found wantingg g

• GreenDeal Approved Installer status• MCS Approved Installer• MCS Approved Installer• Manufacturer’s Approved installers


Follow up: Surveyors Designers

• ISO 9000• ISO 14001• ISO 14001• BSI PAS 2030 (Public consultation now)

– Scrutinise the details– Challenge Green Deal if found wanting

• Become a GreenDeal Approved AdvisorTeam up: Surveyors & Designers• Team up: Surveyors & Designers

• Re-educate yourselves• Get training in hydrothermal softwareGet training in hydrothermal software• Find the right answers

– No Death by Mould– No Destruction by Insulation

• Specify the right stuff by the right installers03/11/2011 129

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Retrofit RetrofitGreenDealGreenDeal

Rewards, Rational, Rhetoric, Risks & Risk Management

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© GreenSpec

• Brian Murphy BSc Dip Arch (Hons+Dist)• Architect by Training• Specification Writer by Choice• Greening up my act since 1999• Founder of www.greenspec.co.ukg p• E [email protected]• Twitter: http://twitter.com/brianspecmanTwitter: http://twitter.com/brianspecman• Scribd: www.scribd.com/brianspecman• Facebook:

http://www.facebook.com/pages/GreenSpec/77375462337

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