WHITE BOOK - Tiling - British Gypsum

Tiling!This section includes updated information, addedsince it was first published in July 2009. Please seethe WHITE BOOK update document for details.Last updated 09/09/2013Berkeley Homes,Royal Arsenal, Woolwich470

TilingIn rooms subject to high or intermittent moisture conditions, therange of boards available for tiling offers flexibility of design andpeace of mind when installed in both wall linings and lightweightpartition systems.Specifically designed for direct tiling applications,Glasroc H TILEBACKER is the ideal substrate for tiling in environmentssubjected to moisture, providing protection for shower enclosures,bathrooms, swimming pool halls and adjacent areas.For areas where intermittent moisture conditions are morecommon, including kitchens and bathrooms, Gyproc moistureresistant grade boards are suitable.Key factslllGlasroc H TILEBACKER hasbeen designed for usein high moistureapplicationsGlasroc H TILEBACKERwill hold tiling systemsup to 32kg/m 2 on wallsand 50kg/m 2 on floorsGyproc moistureresistant grade boardsare suitable for usein low moistureapplicationsGypWall RAPID and RAPID dB Tiling PlusApplicationsShower enclosures, bathrooms, swimming pool halls and adjacent areas.Sector33Sport and leisureHousing33EducationApartment buildings33HealthcareHigh-rise multi-occupancy13 3471

LSPECSURES Y S T E Mwww.british-gypsum.comTilingDesignChoosing tiling boardsWhen designing wall linings and lightweight partition systems, the following guidance details the appropriate board, application anddetails to use.Table 1 - Board lining requirementsLevel of moisture Typical application BoardLowMediumHighResidentialSplash backsKitchensToiletsResidentialKitchensBathroomsResidentialShower enclosure wallsCommercialKitchensChanging roomsGyproc Moisture Resistantand MR variantsGyproc Moisture Resistantand MR variantsORGlasroc H TILEBACKERGlasroc H TILEBACKERExtremeCommercialCommunal shower walls Glasroc H TILEBACKER 1Swimming pool hall walls1 In extreme moisture environments, the exposed surfaces of Glasroc H TILEBACKER should be treated with a suitable tanking system.Guidance for high to extreme moisture environmentsPlanning - key factorsGlasroc H TILEBACKER is recommended for use as a tile backing substratein environments subjected to moisture. The board can be used on bothwall linings, lightweight partition systems and existing timber floors.Glasroc H TILEBACKER is not a structural grade flooring board and cannotbe used as a walking surface.Where the board is installed using the DriLyner system, ensure theGyproc Dri-Wall Adhesive has set before tiles are applied to the boardsurface. The tolerance on the finished tile surface quoted in BS 5385:Part 1, i.e. 3mm under a 2m straightedge with thin-bed adhesives, issuch that it will reflect very accurately the standard of the backgroundsurface.Moisture resistanceGlasroc H TILEBACKER should not be exposed to running water. Careshould be taken not to over tighten screws when fixing boards and allscrew heads should be fully filled with adhesive.In areas of high and extreme moisture and humidity, extra care shouldbe given to detailing at junctions, perimeter sealing and tiling.Perimeter and junction sealingDesigners must give consideration to the precautions necessary atjunctions to ensure that moisture is not allowed to penetrate or collect.Cut edges of boards must be appropriately sealed / waterproofed atabutments.Tanking systemsIn extreme moisture environments, the exposed surfaces ofGlasroc H TILEBACKER should be treated with a suitable tanking system.Continuity of liningsAll partitions and wall linings should be complete. There should be noomissions to board linings, e.g. behind baths.TilingBefore tiling commences, fully fill all edge joints included in the tilingarea with tile adhesive. Install tiles following the manufacturer’sguidance, using a waterproof tile adhesive. Tiles can be applied directlyto the pre-primed surface of Glasroc H TILEBACKER, ensuring the board isdust free prior to tiling. Ensure tiles are sealed using a waterproof groutand sealant at perimeters.Timber stud external walls or partitionsWhere tiling is specified, designers should ensure that the timber is ofsufficient dimensions to give a stable base for the additional loading.The moisture resistance of the timber should be within the limits given inBS 5268: Structural use of timber - Part 2.Underfloor heating systemsGlasroc H TILEBACKER is suitable for use in conjunction with electricunderfloor heating systems. Glasroc H TILEBACKER is installed as perstandard installation, electric under floor heating system should beinstalled in accordance with manufacturers installation details. Theoperating temperature of the heating system should not exceed 40 o C.133Waterproof sealant should be used around baths or shower trays,between the wall surface and the floor at the base of partition or walllining, to prevent any possible moisture being absorbed by the board core.I F E TI M EW A R R A N T YAlways use genuine branded British Gypsum components to qualify for SpecSure ® lifetime warranty474

T 0844 800 1991 F 0844 561 8816 E bgtechnical.enquiries@bpb.comGuidance for low to medium moisture environmentsPlanning - key factorsGlasroc H TILEBACKER, Gyproc moisture resistant grade boards,Glasroc F MULTIBOARD or Rigidur H are recommended for intermittentmoisture applications, including splashbacks. The tolerance on thefinished tile surface quoted in BS 5385: Part 1, i.e. 3mm under a 2mstraightedge with thin-bed adhesives, is such that it will reflectvery accurately the standard of the background surface.Gypsum undercoats and finish coats are designed to work togetherto achieve full strength and therefore tiles should not be applieddirectly to Thistle undercoats, with the exception of Thistle Dri-Coat.Tiles should not be applied until the background and plaster aredry. Note that Thistle Hardwall and Thistle Tough Coat dry from thesurface, appearing surface dry before they are fully dry throughout.TilingWhere designs include part-tiled areas, e.g. low moistureenvironments, apply a layer of ThistleBond-it prior to the boardbeing plaster skimmed above the line of the tiles.Two coats of Gyproc Drywall Sealer applied to the face of standardgrade plasterboards, with the edges adequately protected frommoisture may also be suitable to receive a tile finish. The applicationof Gyproc Drywall Sealer provides surface water absorptionresistance only, and does not meet the performance requirementsfor moisture resistant grade boards as defined in BS EN 520, typeH1.Perimeter and junction sealingDesigners must give consideration to the precautions necessary atjunctions to ensure that moisture is not allowed to penetrate orcollect. Cut edges of boards must be appropriately sealed /waterproofed at abutments.Waterproof sealant should be used around baths or shower trays,between the wall surface and the floor at the base of partition or walllining, to prevent any possible moisture being absorbed by the boardcore.Continuity of liningsAll partitions and wall linings should be complete. There should beno omissions to board linings, e.g. behind baths.Timber stud external walls or partitionsWhere tiling is specified, designers should ensure that the timber isof sufficient dimensions to give a stable base for the additionalloading. The moisture resistance of the timber should be within thelimits given in BS 5268: Structural use of timber - Part 2.Tiling directly onto plasterboardBefore tiling commences, joints and taper recesses included withinthe tiling area should be filled with tile adhesive.Tiling onto plastered surfacesSkim plastering is not normally specified to Gyproc moistureresistant grade boards. Tiles up to 20kg/m 2 (including adhesive andgrout) can be applied directly to Thistle finish plasters, except wherethe system includes a bonding agent. In this situation the totalweight of tiles and plaster applied over a bonding agent is limited to20kg/m 2 , therefore consideration should be given to tiling directly tothe background. If plastering to provide a background for tiles, avoidpolishing the surface. Polished plaster surfaces should be roughenedand a suitable primer used. Consult the tile adhesive manufacturerfor guidance.Tiles should not be applied directly to Thistle undercoats, with theexception of Thistle Dri-Coat.13For full installation details, refer to the British Gypsum SITE BOOK or visit www.british-gypsum.com475

www.british-gypsum.comTilingPerformanceTable 2 - Tiling on partition systemsSystem Board type Thickness(including MR variants)each sidemmGypWall CLASSIC, GypWall QUIET / QUIET IWL48mm, 60mm, 70mm, Single layer Glasroc H TILEBACKER 12.5and 92mm stud Outer layer Glasroc H TILEBACKER 12.5+12.5and inner layer plasterboard48mm, 60mm, 70mm, Any single layer 15mm board, 15and 92mm stud any double layer specification 2 x 12.52 x 1519 + 12.5146mm stud Single layer Glasroc H TILEBACKER 12.5Outer layer Glasroc H TILEBACKER 12.5 + 12.5and inner layer plasterboard146mm stud Any single layer 15mm board, 15any double layer specification 2 x 12.52 x 1519 + 12.5GypWall RAPID SoundBloc RAPID 15GypWall ROBUST / EXTREME DuraLine, Rigidur H 15Timber stud Any board specification 12.5partitions and 15separating wallsGypWall STAGGERED 1 SoundBloc 152 x 12.52 x 15GypWall QUIET SF 1Plank , SoundBlocTiles over lining boards 2 x 12.5fixed to Gypframe 2 x 15RB1 Resilient Bars 19 + 12.5Tiles over lining boards 2 x 12.5fixed to metal studs 2 x 1519 + 12.5GypWall SECURE Glasroc F MULTIBOARD 2 x 10ShaftWall 1 FireLine 1 x 152 x 152 x 12.5GypWall AUDIO 1 Plank, SoundBloc, FireLine 2 x 12.52 x 1519 + 12.5FireWall Glasroc F FIRECASE, Glasroc F MULTIBOARD 2 x 152 x 15 + 61 An additional layer of Glasroc H TILEBACKER can be installed as required.NBThe recommendations given are based on experience and laboratory / site testing. In practice, performance will be dependent on factors such as workmanship and site conditions.13NBS work section K10 - Plasterboard drylinings / partitions / ceilings476

T 0844 800 1991 F 0844 561 8816 E bgtechnical.enquiries@bpb.comTilingStudcentresmmAdditional support600 N/A600 N/A400 N/A600 Extra stud to give 300mm centres at tiling height600 N/A600 Extra stud to give 300mm centres at tiling height450, or 900 with mid-height nogging N/A400 N/A400 Timber noggings 50mm x 38mm minimum at600 600mm centres vertically400 N/A400400600mm centres,Gypframe RB1 Resilient Barsat 400mm centres400mm centresN/AN/A600 Studs at 300mm centres (or Gypframe 99 FC 50Fixing Channel at 1200mm centres) for single layerlining specifications.The two layers of 12.5mm or 15mm plasterboardare bonded with a continuous bead of Gyproc Sealantmidway between studs.400 N/A400400400 N/A40013NBS work section K10 - Plasterboard drylinings / partitions / ceilings477

www.british-gypsum.comTilingTable 3 - Tiling on drylined walls and independent wall liningSystem Board type Thickness Support(including MR variants)centresmmmmDriLyner BASIC Glasroc H TILEBACKER 12.5 600Dabs of GyprocDri-Wall Adhesive WallBoard, SoundBloc, Moisure Resistant 9.5 400 /450in rows 12.5, 15 600DriLyner TL ThermaLine laminates All 600Dabs of GyprocDri-Wall Adhesivein rowsDriLyner SI TriLine All 450Priming anddabs of GyprocDri-Wall AdhesiveDriLyner MF Glasroc H TILEBACKER 12.5 400WallBoard, WallBoard DUPLEX, FireLine, FireLine DUPLEX, 12.5, 15 400Moisture Resistant, DuraLine, SoundBlocThermaLine laminates All 400DriLyner RF Glasroc H TILEBACKER 12.5 300Blobs of GyprocSealant at nominal ThermaLine laminates All 300300mm centresTriLine All 300Timber battens Glasroc H TILEBACKER 12.5 400WallBoard, WallBoard DUPLEX, FireLine, FireLine DUPLEX, 12.5, 15 400Moisture Resistant, DuraLine, SoundBlocThermaLine laminates All 400GypLyner IWL Glasroc H TILEBACKER 12.5 400WallBoard, WallBoard DUPLEX, FireLine, FireLine DUPLEX, 2 x 12.5 400Moisture Resistant, SoundBloc 15GypLyner UNIVERSAL Glasroc H TILEBACKER 12.5 400WallBoard, Moisture Resistant, DuraLine , SoundBloc 12.5, 15 4001 900mm x 1200mm Glasroc H TILEBACKER boards require three Gyproc Nailable Plugs per board.NBThe recommendations given are based on experience and laboratory / site testing. In practice, performance will be dependent on factors such as workmanship and site conditions.13NBS work section K10 - Plasterboard drylinings / partitions / ceilings478

T 0844 800 1991 F 0844 561 8816 E bgtechnical.enquiries@bpb.comAdditional support Additional fixings and centres CommentcentresTilingHorizontal dabs of Gyproc Dri-Wall Nine Gyproc Nailable Plugs through Wall lining left to stand foradhesive at mid-storey height each board in the area to be tiled 1 seven days before tiling beginsHorizontal dabs of Gyproc Dri-Wall N/A Wall lining left to stand foradhesive at mid-storey heightseven days before tiling beginsHorizontal dabs of Gyproc Dri-Wall Nine Gyproc Nailable Plugs through Wall lining left to stand foradhesive at mid-storey height each board in the area to be tiled seven days before tiling beginsHorizontal dabs of Gyproc Dri-Wall Nine Gyproc Nailable Plugs through Wall lining left to stand foradhesive at mid-storey height each board in the area to be tiled seven days before tiling beginsN/A Gyproc Drywall Screws at 300mm Wall lining left to stand forcentres into each supportseven days before tiling beginsN/A Gyproc Drywall Screws at 300mm Wall lining left to stand forcentres into each supportseven days before tiling beginsN/A Gyproc Drywall Screws at 300mm Wall lining left to stand forcentres into each supportseven days before tiling beginsN/A Nine Gyproc Nailable Plugs through Wall lining left to stand foreach board in the area to be tiled 1seven days before tiling beginsN/A Nine Gyproc Nailable Plugs through Wall lining left to stand foreach board in the area to be tiledseven days before tiling beginsN/A Gyproc Nailable Plugs at 600mm centres Wall lining left to stand forvertically, 15mm in from each edgeseven days before tiling beginsHorizontal battens at head, base, N/A N/Aand intermediate positionsnot exceeding 1200mm centresHorizontal battens at head, base, N/A N/Aand intermediate positionsnot exceeding 1200mm centresHorizontal battens at head, base, N/A N/Aand intermediate positionsnot exceeding 1200mm centresMid-height support from N/A N/Aframework to structureMid-height support from N/A N/Aframework to structureFixing brackets at 600mm centres N/A N/AFixing brackets at 600mm centres N/A N/A13NBS work section K10 - Plasterboard drylinings / partitions / ceilings479