U
Unregistered
Hi I have read loads on here about the pva issue for priming/sealing plaster before tiling and I would like to open the debate once again.
Back in 1993 i tiled my bathroom with ceramic tiles on to a plaster skim sealed with pva, there is a shower over the bath that has been used 3 or 4 times a day throughout that period and there is no sign of any loose tiles.This was at a time when there was no alternative to pva and no internet like today to discuss this sort of thing. Anyway time has come and Iam about to refit the bathroom, i will be removing the bath and fitting a 1700mm shower tray in its place and will be tiling the walls floor to ceiling using 305x305x10 travertine and a cement based adhesive and profesional stain resistant wide joint grout, both Larsen products, I will seal the tiles with Seal-Guard Impregnator,3 coats. I have used these tiles before on a plaster skim but in a dry area and the result is impressive. My main question is concerning waterproof PVA. I have some "Evo Stik waterproof adhesive,sealer & primer" The instructions on the tub state and Iam quoting here under the title Wall Tiling "Waterproof Evo-Bond PVA is ideal for priming walls before tiling in wet areas such as showers" It only states priming, does the plaster need to be sealed as well and why should water penetrate through the whole thickness of the tile anyway if it is sealed properly.
For porus surfaces mix1:5 with water non porus surfaces1:1 with water.
Is the issue with using pva to do with using cement based adhesive as opposed to straight out of the tub cheap stuff.
Iam an experienced diy'er having done lots of building projects and have been in engineering for the last 35 years so it would be nice to get to the bottom of this with facts or evidence. You are the best people to ask who are doing the job every day. Iam not a greengrocer or bank clerk type who has no idea.(no disrespect intended) Thanks in advance for your comments.
Neill
Back in 1993 i tiled my bathroom with ceramic tiles on to a plaster skim sealed with pva, there is a shower over the bath that has been used 3 or 4 times a day throughout that period and there is no sign of any loose tiles.This was at a time when there was no alternative to pva and no internet like today to discuss this sort of thing. Anyway time has come and Iam about to refit the bathroom, i will be removing the bath and fitting a 1700mm shower tray in its place and will be tiling the walls floor to ceiling using 305x305x10 travertine and a cement based adhesive and profesional stain resistant wide joint grout, both Larsen products, I will seal the tiles with Seal-Guard Impregnator,3 coats. I have used these tiles before on a plaster skim but in a dry area and the result is impressive. My main question is concerning waterproof PVA. I have some "Evo Stik waterproof adhesive,sealer & primer" The instructions on the tub state and Iam quoting here under the title Wall Tiling "Waterproof Evo-Bond PVA is ideal for priming walls before tiling in wet areas such as showers" It only states priming, does the plaster need to be sealed as well and why should water penetrate through the whole thickness of the tile anyway if it is sealed properly.
For porus surfaces mix1:5 with water non porus surfaces1:1 with water.
Is the issue with using pva to do with using cement based adhesive as opposed to straight out of the tub cheap stuff.
Iam an experienced diy'er having done lots of building projects and have been in engineering for the last 35 years so it would be nice to get to the bottom of this with facts or evidence. You are the best people to ask who are doing the job every day. Iam not a greengrocer or bank clerk type who has no idea.(no disrespect intended) Thanks in advance for your comments.
Neill
