Sealing Plaster Walls Before Tiling

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.

Sealing plaster walls before tiling.

You want the tile adhesive to have something to grab onto. This way the adhesive will stick properly and last in the long run if you are using a good product. If in doubt prime the walls is a general rule. Also now it s been plastered you will be restricting yourself to a tile with a max weight of about 16 kg m2.

Use a proper acrylic based tiling primer sucha s bal prime apd or ardex p51. You didn t say what adhesive you are going to use but one thing that is absolutely definate do not use pva. Seal the walls with a skim coat and let it dry thoroughly. Thoroughly vacuum the area and give the wall a once over with a damp sponge or cleaning cloth.

If you choose a heavier tile you will need to overboard with a backaboard. Adhesive grout and tile 20kg max weight onto plaster. Before you get to it you should level the bathroom the kitchen and or the hallway walls. Otherwise a few complications might occur.

Sand with a medium grit sandpaper to create a uniform surface that s not too smooth. He gave me a list of their recommendations and one of them was to always use waterproof pva diluted before tiling on new plaster. New plaster work should be fully dried before tiling work is commenced this drying time varies upon temperatures but can take up to 4 weeks before fully cured. Don t use paint glue pva wall paper paste only use the primer recommended by the adhesive manufacturer of your chosen tile adhesive.