Water Resistant Plasterboard Wet area application · Water Resistant Plasterboard water resistant...

WaterResistantPlasterboard

waterresistantplasterboard

WaterResistantPlasterboard Wet areaapplication

Australian Owned & Manufactured www.bgc.com.au/plasterboard

OCTOBER 2012

BGC HISTORY& MISSION

BGC Fibre Cement and Plasterboard is a proudly Australian based company that produces fibre cement and plasterboard products for Australia and for export.

Our mission at BGC is simple " Build it Better with BGC".

BGC is one of Australia’s largest builders of houses and commercial buildings in addition to being a manu-facturer of building products other than plasterboard and fibre cement such as insulation, windows, bricks, roof tiles, steel fabrication, insulated wall panels, plumbing materials and metal roofing.

We also have a construction material division producing concrete, cement and asphalt in addition to owning several quarries.

BGC’s Fibre Cement and Plasterboard division prides itself on being innovative and environmentally focused. Both factories are located in Perth and there are BGC distribution centres across Australia and New Zealand.

BGC has shown leadership in the Australian market by being one of the first manufacturers to obtain GECA certification on the majority of their plasterboard products. We are very proud of the fact that our board meets GECA’s requirements by using up to 15% recycled gypsum and 100% recycled paper for the front and back of our plasterboard. We are an active participant in environmental reporting through Energy Efficiency, Waterwise and Emissions reporting programs to keep our environment safe.

The recently released Innova range of fibre cement flooring and façade systems has proven to be a huge success. We have used innovation to ensure these products and systems are lighter and easier to install than our competitors, another example of BGC’s commitment to market leadership.

At BGC we have a team of technical experts who can assist with specifica-tions and design solutions for even the most challenging of projects.

03 BGC WATER RESISTANT PLASTERBOARD - October - 2012

WaterResistantPlasterboard

wet areaapplications

BGC Plasterboarddesigned and developedWR Plasterboard for wetarea walls, in residential andcommercial buildings, suchas bathrooms, laundries,toilets and cleaning room areas, and exterior ceilings such as alfresco areas.BGC WR Plasterboard has a low absorptioncore, eliminates the probability of water wicking,therefore preventing possible damage to thesupporting structure and wall finishes.

Water Resistant Plasterboard: • Specifically designed for wet areas• Has a low absorption core• Light blue face for ease of identification• Quick and simple to install• Can be used for exterior ceilings


Handling & Storage

Water Resistant Plasterboard should be stacked flat,up off the ground and supported on level, equally spaced(max 450mm) gluts.

Care should be taken to ensure edges of the WaterResistant Plasterboard are not damaged when handling.

Water Resistant Plasterboard should be delivered to siteimmediately prior to installation to reduce the riskof damage.

Contents

Introduction

Key Benefits

Plasterboard Finish Selection

Early Fire Hazard Indices

Availability

Introduction 4Key Benefits 4Level of Finish 4Early Fire Hazard Indices 4Availability 4Handling & Storage 4Installation 5Tiled Areas 5Pre-Formed Shower Base 5Insitu Shower Tray 5Shower Over Bath 6Structural Movements and Control Joints 7Jointing 8Australian Standards - Wet Areas 10

BGC Water Resistant (WR) Plasterboard complies withthe requirements of AS2588 ‘Gypsum Plasterboard’,(refer CSIRO Test Report DTS 713).

BGC Plasterboard designed and developed WR Plasterboardfor wet area walls, in residential and commercial buildings,such as bathrooms, laundries, toilets and cleaningroom areas.

BGC WR Plasterboard is to be installed in accordance with AS 2589. “Gypsum Plaster Linings in Residential andLight Commercial Construction - Application and Finishes”and as detailed in AS 3740 “Waterproofing of WetAreas within Residential Buildings”.

BGC WR Plasterboard has a light-blue fungal resistantmulti-layered facing board for easy identification. It isavailable in 10mm and 13mm thicknesses with recessededges, ready for taping and jointing with proprietarywater resistant stopping and setting compounds.

BGC WR Plasterboard has a low absorption core, eliminatesthe probability of water wicking, therefore preventing possibledamage to the supporting structure and wall finishes.

• Cost effective, drywall wet-area lining system.• High serviceability performance board.• Dimensionally stable substrate for tiled wall finishes.• Ready for decorative paint and thin cover finishes.

The selection of plasterboard finish in wet areas dependson the desired tiled surfaces and other wall decorationsrequired. Generally, use Level 4 finishes in wet areas, as detailed in AS 2589.

Where tiles are used, the finish can be of a lower standardand where other decoration is required, the standard ishigher. BGC Plasterboard recommends the architect’sspecifications for the level of finish required.

BGC WR Plasterboard complies with AS 1530.3

• Ignitability Index - 0 • Spread of Flame Index - 0 • Heat Evolved Index - 0• Smoke Developed Index - 4

BGC WR Plasterboard is available in 10mm and 13mmthicknesses, 1200mm and 1350mm wide and invarious lengths.

BGC Plasterboard ensures that the range of stock sheetsizes listed are available, however variations may occurin some states.

Sheet Sizes

THICKNESS (mm)

WIDTH (mm)

SHEET WIDTH (mm)

1200

1350

1200

1350

2400

x

x

x

2700

x

x

3000

x

x

x

x

3600

x

x

x

x

4200

x

x

x

x

4800

x

x10

10


Framing

Installation Table 2-Minimum Screw Fastener Length and Type

Install and fix BGC WR Plasterboard to timber or ColdFormed Steel (CFS) framing or furring channels, whichsatisfy the BCA requirements and which have beenplumbed true and straight.

NOTE: Timber shall be kiln dried with a moisture contentbelow 16%.

Prior to installing and fixing BGC WR Plasterboard,ensure that the preceding trades have certified, that -

• Structural movement will not occur (or is minimised) at wall-to-wall and floor-to-wall junctions.

• All noggings, trims and the like, are correctly installed and fixed for the bath, basins and other fixtures (Noggings are spaced at 600mm maximum centres for 10mm plasterboard and 800mm maximum centres for 13mm plasterboard).

• All perimeters, corner and control joint flashings are in place and correctly installed.

Install and fix BGC WR Plasterboard sheets horizontallyto minimise the number of joints and to minimise lightreflections across the joints.

Cut the BGC WR Plasterboard from the face and snap backaway from the score, then cut the back paper face towardthe front face.

Use a straightedge for neat straight cuts. NOTE: When fixing into preservative treated timbers,Class 3 AS 3566.2-2002 coatings of screws and nailsare to be used.

NOTE: Do not fix BGC WR Plasterboard with adhesives in tiled areas.

Figure 1 - Sheet Set Out Untiled Areas

Fixing

Fix BGC WR Plasterboard sheets horizontally to wallframing and or metal framing, with the bottom sheets first, at 6-10mm clear of the finished floor.

Set out sheets around all wall openings, with cutouts200mm horizontally and 250mm vertically, to preventcorner cracking.

For untiled walls space fasteners at 150mm maximumcentres on internal and external corners. See Figure 1.

Press sheets firmly against the frame and fasten alongone recessed edge at each framing member.

For all wet areas fasten sheets with corrosion resistantClass 3, or better screws, which comply with AS 3566:

For timber-framing plasterboard nails must comply with AS 2334 Steel Nails - Metric series and have aminimum Class 3 or better corrosion resistance.

BGC Plasterboard recommends the use of screw fasteners instead of nails.

SHEET THICKNESS (mm)

CFS STEELUP TO 0.55 BMT

CFS STEEL0.75 TO 1.1 BMT

10

13

6-9 x 25 NP

6-9 x 30 NP

6-18 x 25 SDP

6-18 x 30 SDP

Set sheet 10 mm Clear of floor15

0 Ty

pic

al 300 Typical

Secure sheet edges at each stud

Timber or steel wall frame (typical)

BGC WR Plasterboard Note:

Do Not use adhesivein tiled areas

150

Typ

ical


Tiled Walls

Penetrations

Position fasteners between 10mm and 16mm from theedge of the sheets at the correct spacing to carry the loadsof the tiles.

For walls with tiles 6.5mm thick or 12.5 kg/m2 or less, spacefasteners at 200mm maximum centres on the intermediatestuds and at 150mm on internal and external corners, buttjoints and around openings.

Where tiles are greater than 6.5mm thick or 32 kg/m2, space all fasteners at 100mm maximum centres in the centre of sheets, on internal and external corners, butt joints and around openings.

BGC Plasterboard recommend water proof membrane be used in wet areas 150mm around bath and 150mm above vanity as shown in figures 13, 14 and 15.

Tile adhesive should be compatible with the waterproofingmembrane.

The WR Plasterboard must be cut out to leave a 6 mmgap all round the fixture. This gap must be filled with amould resistant flexible sealant.

BGC recommends using a hole saw to make a neat cutout for fittings such as taps, shower roses etc.Do not use a hammer.

Additional framing must be installed as required to properlysupport all fixtures.

Preliminary work and detail fixing out is similar for external shower trays and preformed shower bases, as shown inFigure 2.

Install and fix perimeter-flashing angles, at the wall/ floorjunction and preformed shower bases or external showertrays, prior to fixing WR plasterboard lining.

Cut and install PVC corner angle, down inside the pre-formedshower base; Figure 8 and fasten to framing at 600mm centres, in a staggered pattern.

Seal the lower edge of WR Plasterboard sheets, whethercut or not, with a proprietary wet-area acrylic sealant or silicone to prevent potential moisture wicking.

Install and fix sheets to the wall framing 6mm clear of theshower tray up-stand; See Figure 2 and of the mortar bed in the external shower tray.

Caulk the bottom edge of the sheets and the shower base orthe mortar bed and around plumbing fixtures with a flexible sealant. See Figures 2 & 3.

Pre-Formed Shower Baseand External Shower Tray

Pre-Formed Shower Baseand External Shower Tray - cont.

Figure 2

TimberFraming

Flexible sealant

Preformed Shower Base

CeramicWall Tiles

BGC WR Plasterboard

Notch framingto accommadate

shower base

Nogging set25 mm aboveshower base

for fixing loweredge of the

BGC WRPlasterboard

6mm

Figure 3 - Sealing Penetrations

To form neat holesfor penatrations in

WR Plasterboard - a holesaw is recommneded

6 mm gap all round

SilconeSealant

Ceramic Tiles

BGC WR Plasterboard

TimberFraming

Install noggingsas necessary toSupport fittings


Insitu Shower Tray Shower Over Bath

Preliminary work and fixing out detail is similar for preformedshower bases and in part the insitu tray details,see Figure 13.

Cut and install PVC corner angle, down inside the bathup-stand flange and fasten to framing at 600mm centres,in a staggerd pattern, see Figure 5.

Seal the lower edge of water resistant plasterboard sheets,whether cut or not, with a proprietary wet-area acrylicsealant, to prevent potential moisture wicking.

Install and fix sheets to the wall framing, as outlinedpreviously 6mm clear off the bath up-stand.

Caulk the bottom edge of the sheets and the bath edgearound plumbing fixtures with a mould resistant flexible sealant.

Apply a proprietary branded liquid membrane 150mmabove the bath edge and wall surround, to a minimum height of 1800mm to the entire area above the finished floor level and 75mm each side of the corner, see Figure 5 & 13.

Install and fix perimeter-flashing angles, at the wall/floorjunction.

Cut and install PVC corner angle and fasten to framingat 600mm centres, in a staggered pattern.

Seal the lower edge of water resistant plasterboard sheets,whether cut or not, with a proprietary wet-area acrylicsealant to prevent potential moisture wicking.

Install and fix sheets to the wall framing, as outlinedpreviously, 6mm clear off the floor.

Form a bond-breaker with closed-cell foam backing rodand masking tape at the bottom edge of the Plasterboardat wall/floor junction, as shown in Figure 4.

Caulk around plumbing penetrations.

Apply a proprietary liquid membrane material to the faceof the plasterboard and floor to form an insitu internalshower tray.

Follow the membrane manufacturers’ instructions.

Apply the membrane to the entire shower area to a mini-mum height of 1800mm from the finished floor surface.The liquid membrane is to extend 75mm minimum eachside of the corner.

Note: Use only insitu membrane materials appraisedand approved by recognised authorities.

Figure 4

Figure 5

BGC WR Plasterboard

Wallframing

Liquidmembrane

Perimetreflashing

Bond breaker Masking tape Mortar bed BGC Compressedfibre fement sheeting

Wall tiling toBuilders specification

Flexiblesealant

Corner flashing

Liquidmembrane

Paper tape usingBGC Taping Cement or Exterior and Wet Area Base Coat

View A

BGC WRPlasterboard

Flexible sealant required

Flashing

Corner flashing requiredto Bath base

Wall tiling toBuilders specification

Flexible sealantrequiredNotch framing to accomodate

Bath rim

Corner blocking

Tiling

Additional framing required

Additionalframing

required

Bath


Buildings and their component parts move over time dueto various factors which may lead to building and orsystem failures if design, materials and/or installation arenot satisfactory.

To minimise the risk of system failure take care whendesigning, detailing, installing and finishing all aspectsof wet areas.

The design of wet areas must take into account any relativemovements in the building structure and components,due to loading and temperature and humidity variationsand the like. See Figure 6.

Structural Movementsand Control Joints

Figure 6

BGC WR Plasterboard

FrameAs constructed

FrameAfter shrinkage

View A View B

Gap

Gap

due

to

shrin

kage

Gap

Base dropped

Gap

BGC Compressed

sheet flooring

Bond breaker(backing rod)

Mortar bed

Insitu internal showertray membrane

Mortar bedbase dropped

Gap opens between Mortar bed and Shower tray, at the wall, as framing shrinks

Masking tape:Holds bond

breaker in position and

prevents liquidmembrane penetrating

behind bond breaker

Control Joints

Corner Jointing

In long runs of wall, control joints should be set at 7.2metres maximum in non-tiled areas, and at 4.2 metresmaximum, in tiled areas or at construction joints, which everis the lesser. Control joints must allow for the differentialexpansion and contraction between the structure, wall liningand tiles. Control joints, must be constructed with doublestuds, with a gap to suit the control joint type.Refer Figure 7.

Corners are set and finished with paper tapes in wet areasfor internal corners, or external beads for external corners.

However, in wet area construction, corners abovepre-formed shower bases, insitu trays and showerover baths situations require special attention to detail,as noted.

Figure 7

15mm Gap

Wall Framing -Light weight steelor Timber (Typical)

Rondo P35 Controljoint or MBS P45

Jointing Kit installedto manufacturer'srecommendation

Additionalstudwork

BGC WRPlasterboard

Flush finish withbedding cement -

Keep joint clean offlushing material


Figure 6

Vertical Corner Flashing Jointing

Table 3 - Tiled Areas

Table 4 - Tiled Areas-Non-Wet Areas

Table 5 - Non-Tiled Areas-Finish Coat

In tiled walls, vertical corner flashings finish insidepre-fabricated shower tray/base, insitu-laid trays or the like.Refer Figure 8.

Wet area plasterboard joints must satisfy the BCArequirements and comply with AS 2589.

All WR Plasterboard joints in wet areas must be set withperforated paper tapes and proprietary branded base andflushing compounds such as BGC WR Taping Cement, BGC Exterior and Wet Area Base Coat and Top Coat outside tiled areas.

The wet area base-coat system is typically a two-coatsystem under tiled areas and a three-coat system wheretiles are not used. Refer Tables 3, 4 and 5.

All horizontal, vertical and corner joints and fastenerpoints must, be stopped and set with the same materials,to ensure water resistance across the wall areas.

The use of correct materials, application and sequencing of taping and jointing is important and any deviationmay result in joint failure.

Mixing of different proprietary compounds or applicationof setting type compounds over acrylic drying compounds,may lead to joint failure and will negate any proprietaryitem warranties.

Only use drying type topping or finishing compounds over BGC Exterior and Wet Area Base Coat.

NOTE: Do not use setting type compounds overwater-resistant acrylic drying type compounds.

Do not use self adhesive tapes. Paper Tape only to be used.

NOTE: BCG Wet Area Taping Cement to be used under tiled areas only.

BGC Exterior and Wet Area Base Coat may be used in tiled and untiled areas.

BGC Exterior and Wet Area Top Coat to be used in untiled areas only.

Rondo P40

or pvc 50x50

Vertical cornerangle flashing(40x40 nominal)

BGC WRPlasterboard

Prefabricated Shower tray

Skirting - for detailssee figure 2External prefabricatedshower tray

Hob is formed inside shower tray

Perimeterangle flashing

Floor tilingto Builders

specification

a

a

Mould resistantflexible sealant

25m

m m

in

Prefabricated Shower tray

Floor tilingto Buildersspecification

Concrete slab

Shower screen

Mortar bed Tiled hob

Section a - a

FIRSTCOAT

FIRSTCOAT

FIRSTCOAT

BGC Water Resistant Taping Cement or BGC Exterior and Wet Area Base Coat






None Required

None Required

BGC Exterior and Wet Area Top

Coat or BGC Multipurpose

Joint Compound or BGC Top Coat

Perforated Paper Tape



TAPE

TAPE

TAPE

SECONDCOAT

SECONDCOAT

SECONDCOAT

FINISHCOAT

FINISHCOAT

FINISHCOAT


First Coat and Tape

Second Coat

Finish Coat

Sanding and Finishing

• Wipe joint recesses with damp cloth to remove dust from plasterboard face.

• Fully fill recess evenly with BGC WR Taping Cement.

• Centrally bed the paper tape into bed coat and cover lightly with BGC WR Taping Cement or BGC Exterior and Wet Area Base Coat and allow to fully dry.

• Cover all fastener points with BGC WR Taping Cement or BGC Exterior and Wet Area Base Coat and allow to fully dry.

The above is applicable for both tiled and non-tiled areas (Level 4 Finish).

First coat and second coat only required for tiles areas

Figure 9

Figure 10

• Apply the second coat of BGC WR Taping Cement or BGC Exterior and Wet Area Base Coat 180mm wide and feather out the edges and allow to fully dry.

• Apply a second coat to all fastener points, feather out 25mm and allow to fully dry.

The finish coat is only required where tiles are not usedand another decorative finish is required. Eg level 4 Finish.

• Apply a 250mm wide approximate, thin finish coat, centrally over the second coat.

• Dampen the outer edges with a sponge to feather out the edges of the finish coat and allow to dry.

• Apply a thin finish coat over all fastener points and feather out 40mm and allow to dry

Figure 11

Figure 12

• Allow joint and fastener point coating compounds to dry for 24 hrs before sanding.

• For tiled areas lightly sand all joints and fastener points, with 150 grit or with 220 sanding mesh, to remove any high spots.

• Wipe off excess dust with a slightly damp cloth, prior to the application of tile adhesive, seal coats or decorative finishes.

First Coat

First coat100mm approx

3. Lightly cover paper tape

1.Fill recess

2. Install paper tape over joint centre line

Topping Coat

5. Apply Topping Coat

250mm

Second Coat

4. Second coat

180mm approx

6. Allow 24 hours min drying time then lightly sand joint

Finishing Sanding


Australian Standards

Table 6 - Design and Installation for Wet Area Waterproofing AS3740-2004

Figure 13

Wet Areas

“An area within a building supplied with water from awater supply system and includes bathrooms, showers,laundries and sanitary compartments. Excludes kitchens,bar areas, kitchenettes or domestic food and beveragepreparation areas”.

The BCA requires that all wet-area design, constructionand materials, do not create unhealthy, dangerousconditions, or damage to building components, causedby dampness, water overflow, infiltration or penetration.

LEGEND:N/A - Not Applicable / * Including mechanical fixings orfasteners through surface materials / ¥ Wall/floor junctionsonly / ‡Where floor waste is provided the floor shall begraded to the waste / §If a shower is included in a bath,include the requirements for shower area walls

The following tables are the specific requirements forWet Areas taken from the Australian Standards 3740-2004and are applicable to areas lined with BGC WR Plasterboard.

Water proofing 150mm wide along Bath / Floor joint

Waterproof entire floor ifCompressed Fibre

cement sheet flooring

Water proofing150mm wide along vertical corners of bath

Water Proofing1800mm above

base of bath

Flexible sealant along

Bath / Sheet joint

Seal tap set penetrations usingmould resistant flexible sealant

1500mm Min. Radiusfrom Shower Rose

Additional treatmentrequired to areashown darker, if shower screen notfitted

BGC WR Plasterboard

Waterproof*

N/A

N/A

Horizontal surface

Waterproof*Vertical surfaceWater resistant

Horizontal surface

Waterproof*Vertical surfaceWater resistant

Horizontal sur-face Waterproof*Vertical surfaceWater resistant

N/A

Waterproof where through the floor,

otherwise N/A

Vessels or area where the fixture is installed Level of risk

High

Medium

Medium

Low

Low

High

Shower area

Bathrooms

Areas adjacent to baths & spas§ (applies to all rooms in

which a bath or spa is installed)

Walls adjoining other vessels (e.g., sink, basin or laundry tubs)

Laundries & WCs

Bathrooms & laundries requiring a floor waste in accordance with Volume One of the BCA

Floor

Waterproofed & drained

Concrete & compressed fibre cement sheet flooring

Water resistant‡

Timber floors including

particleboard, plywood &

other materialsWaterproof

Concrete & compressed fibre cement sheet flooring

Water resistant‡

Timber floors including

particleboard, plywood &

other materialsWaterproof

N/A

Water resistant‡

Waterproofed and drained

Water proof

N/A

N/A

Water resistant§

Water resistant§

Water resistant

N/A

N/A

Waterproof

Waterproof¥

Waterproof¥

Waterproof

Waterproof

Waterproof

Water resistant¥

Waterproof¥

14

13, 15

13, 15

15

Walls Junctions

Design and installation criteria

Penetrations Figure No.


Australian Standards

Table 7 - General Requirements for Extent of Application AS 3740-2004

Internal CornerFlashing to 1800mm

above finished floor level

1800 mmAbove Hob

Floor sloped toward drain

Shower screen fitted

Wall tiling (typical)waterproofed entire shower area

Preformed shower base

Seal tap set penetrations usingmould resistant flexible sealant

BGC WR Plasterboard

Figure 14

Seal all penetrations


Vessels or area where the fixture is installed

Shower area

Enclosed & hobbed

Enclosed & hobless

Enclosed & stepped down

Enclosed & preformed shower base

Floors & horizontal surfaces

Waterproof entire enclosed shower

area, including hob


area including water stop


area including the stepdown

N/A

Waterproof to 150mm min. above

the shower floor substrate or 25mm

min. above the maximum retained water level and the

remainder to be water resistant to a height of 1800mm min. from finished

floor level


the shower floor substrate and the remainder to be

water resistant to a height of 1800mm min. from finished

floor level


the shower floor sub-strate or 25mm min. above the maximum retained water level

and the remainder to be water resistant to a height of 1800mm min. from finished

floor level

Water resistant to a height of 1800mm min. from finished

floor level

Waterproof internal & external corners & horizontal joints within a minimum height of 1800mm

above the floor level with a minimum

width of 40mm either side of

junction

14

14

Walls Wall junctions & joints




Table 7 - Continued

Figure 15

Seal all tap & spout penetrations where

they occur in a horizontal surface

Seal all tap and spout penetrations where they occur

in a horizontal surface

N/A

Waterproof where through the floor,

otherwise N/A


Insert baths

Walls adjoining other vessels (e.g., sink, basin or laundry tub)

Laundries & WCs

Bathrooms & laundries requiring a floor waste in

accordance with Volume One of the BCA


N/A for floor under the bath

Waterproof entire shelf area,

incorporating a waterstop under the bath lip and project a minimum of 5mm

above the tile surface

N/A

Water resistant to entire floor

Waterproof & drain entire floor

N/A for wall under the bath

Waterproof to 150mm above the

lip of the bath*

Water resistant to a height of 150mm min. above vessel

if the vessel is within 75mm min.

of the wall

Seal all wall to floor junctions with a

skirting or flashing to 25mm min.

above the finished floor level, sealed

to the floor

N/A

N/A for wall under the bath*

Where the vesel is fixed to a wall, seal

edges for extent of vessel

Waterproof all wall to floor junctions, where a flashing is used the horizontal

leg shall be a minimum of

40mm

Seal all wall to floor junctions with a

skirting or flashing to 25mm min.

above the finished floor level, sealed

to the floor

13




LEGEND: N/A - Not Applicable / * If a shower is included in a bath, refer to the requirements for shower area walls & penetrations ¥ Does not apply to joinery fittings such as vanities

150mm

Perimeter Flashing between wall & floor

150mm

If bath surround is installed, a perimeter flashing angle isrequired at this junction(both floors and walls)

BGC WR Plasterboard

Surround, Wall and Floor tiling to Builders specification

Wall Tiling to Buildersspecification.

Seal penetrations usingmould resistant flexible sealant

BGC WR Plasterboard


Table 7 - Continued

Waterproof internal and external corners and horizontal joints to a minimum height of 1800mm above the floor level with a minimum width

of 40mm either side of junction

Waterproof all wall to floor junctions, where a flashing is used the horizontal leg shall be a mini-mum of of 40mm

Waterproof all wall to floor junctions, where a flashing is used the horizontal

leg shall be a minimum of 40mm

Seal edges for extent of vessel

and junction of bath enclosure with floor. Where the lip of the bath is supported

by a horizontal surface this area

shall be waterproof for showers over bath

and water resist for all other cases

Seal edges for extent of vessel

and junction of bath enclosure with floor. Where the lip of the bath is supported by a horizontal surface

this area shall be waterproof for

showers over bath and water resist for

all other cases


N/A

N/A






the shower floor substrate or 25mm

min. above the maximum retained water level and the

remainder to be water resistant to a height of 1800mm min. from finished

floor level

N/A

N/A

Water resistant to a height of 150mm min. above vessel

and exposed surfaces below

vessel lip to floor level*

Water resistant to a height of 150mm min.

above vessel and exposed surfaces below vessel lip to

floor level*


Unenclosed

Areas outside the shower area for concrete and

compressed fibre cement sheet flooring

Areas outside the shower area for timber floors including

particleboard, plywood and other flooring materials

Areas adjacent to baths and spa*¥ for concrete and

compressed fibre cement sheet flooring

Areas adjacent to baths and spas*¥ for timber floors including

particleboard, plywood and other flooring materials


Waterproof entire shower area


Waterproof entire floor


Waterproof entire floor

13

13




BGC Plasterboard wishes to acknowledge and recommend treatment and installation ofwet areas as per the Australian Standards


Exterior Alfresco Ceilings

Environment

Condensation

Recommended BGCPlasterboard Materials

The construction of exterior entertainment areas attached to a dwelling with a lined ceiling in Australia is proving popular. These areas are inherently exposed to much more arduous conditions to that of the rest of the house internally.

Areas that could be included are areas outside the mainenclosed living area of a house or similar environment.E.g. carports, garage ceilings, alfresco areas or similar.

Fasteners

Recommended fixing & spacing

Installation

Painting

Fasteners used can be screws or nails and must be toClass 3. When fixing BGC Plasterboard to an exteriorceiling, use fasteners in the 1/3 spacing method usingappropriate fasteners adhesive.

Framing to be maximum 450 mm centres.

Screw fixings:Plasterboard width # of Screws Position of screws.1200mm 5 evenly spaced 1 per recess & equally spaced300mm centres.1350mm 7 evenly spaced 1 per recess & equally spaced225mm centres.

Nail fixings:Plasterboard width # of nails Position of nails.1200mm 7 evenly spaced 1 per recess & equally spaced200mm centres.1350mm 9 evenly spaced 1 per recess & equally spaced170mm centres.

All perimeters to have appropriate framing/noggings etc in order to support all sheet edges. Perimeters to be screwfixed only at 300mm centres. The perimeter may be fixed out with timber noggings or metal plasterers angle (Rondo P18) or equivalent. Framing centres to be at a maximumof 450mm.

All flush joints must be back blocked in accordance withAS/NZS2589:2007

Paper tape must be used in conjunction with drying typebase products in the recessed joins. Exterior Base and topping to comply with ASTM C475.

Plasterboard sheets to have a minimum 6mm space fromperimeter walls. Fascia boards/perimeter beams shouldcontinue at least 20mm below the bottom of theplasterboard ceiling or the perimeter wall/ceiling trim.

Roll or brush on high quality sealer undercoat designedfor external application. Use only manufacturer’srecommended external paint for this application

Level 4 shall be the minimum level finish for plasterboard.Level 5 is recommended when critical lightingconditions apply.

The environments of exterior ceilings are often severe and can be effected by;-

• The generally constant high humidity• The climate of the region• Wind loads• Garage Roller Door Vibration• Insufficient perimeter support

To overcome potential problems in these areas it is important to consider the following points;-

• The correct choice and installation of lining materials, fasteners, jointing and coating materials, designed to suit the environments• Correct placement and installation of battens and installation methods• The design and detail of the structural components and their protection from moisture• Final paint decoration

Surface condensation and wind loads can be the maincauses of lining board and jointing system failure. Insufficient protection can lead to the plasterboard distorting as well as potential mould attack.

Use sarking or foil backed insulation underneath metalroofing as this is more susceptible to condensation build up than roofing tiles.

It is important that ceiling cavity areas are well ventilatedto prevent condensation build up, the Installation of eaveand gable vents, roof ventilators etc can assist in this.

Building materials and systems may be adversely affectedby these severe environmental and physical conditions,which if not installed correctly can lead to ceiling failureand or collapse.

• 10mm Water Resistant Plasterboard• 13mm Water Resistant Plasterboard• 13mm Wet Area Fireboard• 16mm Wet Area Fireboard


Considerations

Before lining the building it is prudent to consider thefollowing design and construction issues;-

• Consideration must be given to the framing, this may vary throughout Australia especially in high wind and coastal areas• It is highly recommended to batten out the ceiling with Rondo 16mm metal battens or 16mm Furring Channel or 28mm Furring Channel or equivalent. These are to be fixed on the appropriate direct fix clips.• High-pressure differentials across a wall, may cause the wall to bend and move; hence• Ensure that wall and ceiling areas do not exceed maximum allowable areas, heights or lengths, and provide movement and or relief control joints where necessary

Warranty

We warrant that our products are free from defects caused by faulty manufacture or materials for a period of 15 years from the date of purchase. If you acquire any defective products, we will repair or replace them, supply equivalent replacement products or refund the purchase price within 30 days of receiving a valid claim subject to product inspection and confirmation of the existence of a defect by BGC. We will bear the cost of any such repair, replacement or refund.

This warranty is given by:

BGC Plasterboard Pty LtdGround Floor, 290 Bushmead Rd, Hazelmere, WA 6055Phone: (08) 9374 2900 Fax: (08) 9374 2901

To claim under this warranty, you must provide proof of pur-chase as a consumer and make a written claim (including any costs of claiming) to us at the address specified above within 30 days after the defect was reasonably apparent, or if the defect was reasonably apparent prior to installation, the claim must be made prior to installation. You may not claim under this warranty for loss or damage caused by:• faulty or incorrect installation by non-BGC installers (BGC’s installation procedures are at www.bgc.com.au/plasterboard);• failure to comply with the Building Code of Australia or any applicable legislation, regulations approvals and standards;• products not made or supplied by BGC;• abnormal use of the product; or• normal wear and tear.

The benefits available under this warranty are in addition to other rights and remedies of the consumer under the law. Our goods come with guarantees that cannot be excluded under the Australian Consumer Law. You are entitled to a replacement or refund for a major failure and for compensa-tion for any other reasonably foreseeable loss or damage. You are also entitled to have the goods repaired or replaced if the goods fail to be of acceptable quality and the failure does not amount to a major failure.


Notes

To contact your nearest BGC stockist, please call:

AdelaideTelephone 08 8250 4962

BrisbaneTelephone 07 3271 1711

MelbourneTelephone 03 9392 9444

PerthTelephone 08 9334 4900

SydneyTelephone02 9632 2100

New ZealandTelephone0011 64 9264 1457

Technical Help Line1300 652 242

bgc.com.au/plasterboard

Safe working practices - Please wear a P1 or P2 mask and safety goggles (approved to AS/NZW1337 standards) whilst cutting or installing Water Resistant Plasterboard. Water Resistant Plasterboard can be safely handled during unloading or stacking without the use of these precautions. Cleaning up - Always wet down your work area when cutting Water Resistant Plasterboard, to ensure that dust is managed. Dispose of any vacuumed dust with care and using containment procedures.

Design by The SHAPE Group www.theshapegroup.com.au

BGC Plasterboard is a proud Australian owned manufacturer of Plasterboard products.

BGC has state-of-the-art manufacturing facilities in Perth and distribution centres in all states of Australia and in New Zealand.

Our distribution network ensures that our entire product range is readily available in all states of Australia.

BGC has a team of technical specialists who can assist with all specification and design information.

BGC provides builders, developers and architects with a range of design alternatives and innovative products, such as:

• CeilingboardTM – designed for interior use providing a flat, blemish free, monolithic, smooth surface ready for decorating and is ideal for all interior ceiling applications, residential and commercial where cost effectiveness is paramount. • Enviroboard – more recycled content than standard plaster board, BGC Enviroboard does not compromise on perforance, giving an interior lining board that meets performance requirements and is more friendly to the environment.

• WR Plasterboard – primarily developed for wet area walls in residential and commercial buildings but is also ideal for Verandas, garages and alfresco ceilings.

• FireboardTM – designed for use where fire systems are specified in residential and commercial buildings. FireboardTM delivers the required Fire Resistance Level whilst maintaining a flat, blemish free surface suitable for decoration.

• SoundboardTM – is high density plasterboard that has been specifically designed to greatly reduce unwanted noises that can be heard from one room to another through walls and ceilings.

• Wet Area FireboardTM – has been developed specifically for use in wet areas where a fire resistance level is specified.

• Moisture Resistant FlameboardTM – has been developed specifically designed for use in fire risk areas where no FRL is required.

• Compounds – BGC plasterboard has developed a range of plasterboard compounds to aid in the fixing of our various products.

• Cove Cornice – provides a clean, continuous line at the junction of wall and ceilings. Three profile sizes are available to suit all applications.

BGC-2011GECA 04-2011v2-PANEL BOARDS

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