All tiling should be carried out to current best practice and relevant standards. For further information or details of substrates not covered below, consult Arc Tiling Guide.
Concrete: Concrete should be a minimum of 6 weeks old. Prime with Arc Tiler’s Primer diluted 3 parts primer to 1 part water.
Power-floated concrete: Mechanically abrade surface and vacuum dust. Prime surface with 1 coat Arc Tiler’s Primer Plus.
Sand Cement Screeds: New screeds should be a minimum of 4 weeks old. Prime with Arc Tiler’s Primer diluted 3 parts primer to 1 part water.
Gypsum screeds: Screed must be confirmed dry and the residual moisture content must be below 0.5%. Mechanically abrade surface and vacuum dust. Prime surface with Arc Tiler’s Primer diluted 3 parts primer to 1 part water followed by one neat coat of Arc Tiler’s Primer.
Timber floors: Timber substrates must be sufficiently rigid and supported to be free from excessive deflection under expected loads. Arc recommend overlaying timber floors with Arc MagnaBoards, screw fixed at 150mm centres. Where plywood is used as overlay it must be exterior grade and a minimum of 15mm thick. Prime boards with Arc Tiler’s Primer diluted 3 parts primer to 1 part water.
Blockwork / Render: New blockwork must be a min New Gypsum Plaster – Gypsum plaster must be at least 4 weeks old. Polished plaster must be brushed with a stiff brush. Weight of tiles and adhesive must be less than 20kg/m2. Prime with Arc Tiler’s Primer diluted 3 parts primer to 1 part water.
Plasterboard: For plasterboard without a skim finish, weight of tiles and adhesive must be less than 32kg/m2. Prime with Arc Tiler’s Primer diluted 3 parts primer to 1 part water.
Plywood Walls: Timber based boards including plywood are no longer recommended substrates for tiling. If they are present, Arc recommend replacing them or over-boarding them with Arc MagnaBoards.
Underfloor Heating: Piped underfloor heating systems must have been fully commissioned to maximum running temperature. Turn off heating 24hrs prior to tiling (or in cold conditions to below 15°C). When tiling is completed allow 7 days before switching on heating and increase the temperature gradually by max 5°C per day.
Movement Joints: Ensure there is adequate provision of movement in the tiling installation by the inclusion of sufficient and adequate joints. This is particularly important on heated screeds and with larger tiles.
Priming: Generally prime absorbent surfaces with Arc Tiler’s Primer diluted 3 parts primer to 1 part water and non-porous surfaces with 1 coat Arc Tiler’s Primer Plus. Allow primer to dry before tiling.
TILES & SUBSTRATES
- Porcelain, Ceramics, Terracotta, Quarry, Quartz, Glass, Marble, Mosaics, Limestone, Travertine, Natural Stone, Slate.
- Plywood, Concrete, Plaster, Screeds, Backer Boards, Anhydrite Screed, Underfloor Heating, Plasterboard, Existing Tiles, Render, Brick & Block, Heated Screed, Vinyl Tiles, Fibre Cement, Asphalt Flooring.