marine ply

[paul damian]

as above , builders are not tilers, they will drop you in it faster than a falcon in freefall. If tiles fail its the tilers fault, GET IT.

 

[The Legend; Phil Hobson RIP]

Tiles/ grout are not waterproof, so a backerboard will allow water ingress, but not break down as plasterboard will, just my take on it

 

[Rich]

Phil has hit the nail on the head... Yes, they are completely necessary.

 

[jay]

I recently retiled a shower area, the plaster board had been up since 1984, and it was only damp behind, at the bottom because the silicone had split, are we not over killing by using all these water proof boards, if there is a good seal, why not use plasterboard ?, in 15 years time, when you dont have to worry about the guarantee, the owners will probably want to up date anyway, all these new backer boards, are they really necessary. ?

and how does the plaster dry out/// waterproofing has its place and in my opinion is a wise move ,if its done right we should see no more ceilings with water damage (due to upstairs bathroom) or rotting timber and carpet in the next room .

 

[terrycoe1]

when i rung bal tech i had asked wether to prime they said yes it comes with the kit i primed then tanked dryed of nicely and the marine ply is 24 mm + thick !! it feels solid too i sealed all edges as well

 

[Rich]

Cool and the gang.

In that case you should be good to go

 

[widler]

I recently retiled a shower area, the plaster board had been up since 1984, and it was only damp behind, at the bottom because the silicone had split, are we not over killing by using all these water proof boards, if there is a good seal, why not use plasterboard ?, in 15 years time, when you dont have to worry about the guarantee, the owners will probably want to up date anyway, all these new backer boards, are they really necessary. ?

i think its overkill in some situations.like you have pointed out,plasterboard has been used for years as a substrate,and you used to have to skim it as well.
but,there is nothing wrong with it,times move on and new fandangled thingiemebobs come out every day,some are rubbish some are good

 

[kopthis]

I agree nothing wrong with plasterboard that is tanked as good as anything else on the market and a lot cheaper,

 

[widler]

i think its overkill in some situations.like you have pointed out,plasterboard has been used for years as a substrate,and you used to have to skim it as well.
but,there is nothing wrong with it,times move on and new fandangled thingiemebobs come out every day,some are rubbish some are good

ps,i would never tile onto ply,did it once,never ever again,wood swells, shrinks, bows ec.
imo,i would just tell your customer to change it,use the ply to do something else