Tiling On Heavy Gypsum Plaster Wall

Preparation for tiling onto plasterboard plasterboard should be dry securely fixed and rigid with no protruding fixings with the face to receive decorative finishes exposed.

Tiling on heavy gypsum plaster wall.

It is needed for the adhesive to bond well. Laying of tiles on gypsum plaster is carried out in 7 14 days. Don t try to use the tile setting adhesive or drywall joint compound to patch plaster walls. The adhesive and tile will block moisture from evaporating.

The drying time is also affected by the thickness of the plaster layer. It should be a minimum 12 5mm thick when fixed to timber framing or battening and fixed in accordance with the manufacturers recommendations. When applying tile to a plastered surface it is important not to overload the weight of what the plaster will take before failure occurs plaster will support about 20kg m2 or about a 9mm thickness of ceramic tile. Apply the last layer of skim coat and use a medium sized sandpaper to achieve a rough texture.

However tiling over tile can add quite a bit of thickness so make sure your wall can handle the weight. You should not tile over wallpaper glossy surfaces lead paint or plywood. If you have a tiling job to do in your bathroom and the walls have been skimmed with plaster you have to follow a few guidelines when installing tile to make sure you do not have a failure resulting in all the tiles coming off the wall. Fresh plaster whether applied as a patch or to the entire wall must dry completely before tile is applied.

Expected load for tiling onto gypsum board should not exceed 32 kg m2. Make sure that gypsum board plaster board is strong enough to support the load from tiles and adhesive. It is believed that the cement sand mortar dries at a speed of 1 cm in 7 days. Tiling onto plasterboard walls.

What this means for your installation is once it has been determined the gypsum board and its supporting structure have been properly designed constructed and installed to support a tile installation consult your setting material manufacturer to determine which of their adhesives or mortars and possibly primers are recommended to bond the tile to the painted gypsum substrate. Firstly check the condition of the plaster skim it should be fully dried out and a light pink colour. If you re not sure if you have lead paint test kits are available. The primary hardening of the tile adhesive takes 1 2 days and the full up to 7 days.

Once it s ready for tiling there is no need to tape the joints. Fresh plaster needs up to a month for the material to set in and fasten. Tiling over damp plaster causes the wall to fail because the plaster won t become strong if it can t dry out. Holes or cracked plaster requires patching.