Substrate Identification Wall Tiling Principal Wall Substrates Cementsand
Substrate Identification Wall Tiling
Principal Wall Substrates Cement/sand rendering Gypsum plaster Plasterboard Existing tiling Timber based boards Painted surfaces Tile Backer Boards
Minor Wall Substrates Brickwork Blockwork Concrete Decorative laminate
Substrate Preparation Walls
Cement/sand Rendering Ideal substrate 1: 3 or 4 cement/sand Wood float finish Allow 14 days drying time All adhesive types can be used
Gypsum Plaster Most common in the UK Allow 4 weeks drying time Only tile on finishing coat Prime if dusty All adhesive types can be used Prime if using a cement based adhesive 20 kg/m 2
Plasterboard Direct fixing No drying time 32 kg/m 2 All adhesive types can be used Prime if using a cement based adhesive
Tile on Tile Check for soundness Hollows/voids Sounding tiles Wash down surface All adhesive types can be used Delayed drying
Painted Surfaces Soundness/strength Tape test Wash down surface All adhesive types can be used Delayed drying Weight of tiling
Tile Backer Boards No drying time Impervious to water Can take large weight of tiles Ready mixed adhesives have delayed drying time Big weight variation depending on the type of board Must use cement based adhesive
Timber Walls Ensure that the boards are WBP grade It is to be rigidly supported. Prime the back and edges of the boards and allow to dry. Weight of tiling MDF (Small areas only) Do not tile onto OSB Board Would normally recommend highly polymer modified cement based adhesive
Brickwork & Blockwork Allow 6 weeks before tiling onto new block work. The surface must be flat. Lightweight block need priming with PR 360 Tiling over 3 m from the ground should be mechanically restrained Must use cement based adhesive
Minor Substrates Concrete Fix direct Decorative laminate Sound and grease free
Adhesive Choice Ceramic up to 300 x 300 mm Porcelain Natural Stone Mosaic
Adhesive Choice Solid Backgrounds subject to expansion
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