1st bathroom help!!!!!!!

[geordie2013]

😕 Hi all doing first bathroom next week.
Porcelain tiles on both floor and walls. My problem is half the walls are plaster and half concrete. Would i need 2 different adhesives or could i just use a multi flex. The floor is ply so do i prime it first and what adhesive and grout on that. Thanx

 

[MTS]

Use a flexible rapid set (cement based) adhesive on the floor. Prime ply with acrylic. For walls use tub adhesive if tiles are less than 10mm, if thicker than 10mm then use flex cement adhesive. PVA the cement walls and prime tha plaster walls with acrylic

 

[Fred]

Agree with MTS, but if wall tiles are over 300x300 I'd would use white podwer flexi addy like Bal white slow set flexi.

 

[enduro]

Dont ever use pva when tiling always use a proper tile primer...when will you all learn.

 

[calculator]

Second that never use pva to tile

 

[MTS]

Why not use PVA ?

 

[calculator]

at micro level the pva forms crystals that prevent the adhesive bonding to the wall, also if the pva were to get wet it goes soft again

 

[MTS]

Thanks

Is it ok to bond cement floors with PVA or does the same apply?

 

[calculator]

same applies but you don't need to prime a cement floor if its an established floor if its faily new you need to use an acrylic primer

 

[MTS]

Thanks, I've been using PVA but will stop and start using acrylic primer