Re-doing bathroom floor

[thorien]

Hi,

I'm about to completely overhaul the bathroom, this will include taking out the carpet and tiling the floor.

Currently under the carpet there is green chipboard? I reckon this will get ripped out as we are moving a few walls and positions of bath toilet, sink etc so new piping will necessitate taking it all up....

When re-laying the floor I was going to get 3/4 " Marine ply and screw and glue down to the joists. Then I was going to use flexible grout and tile over....

Now then, is this the correct way to do things to make sure there is no cracking and loose tile in the future? I've heard from a few people that I could use aquapanel on top of the ply, or use aquapanel on top of the green chipboard or just use WPB Ply on its own, or Use marine ply on its own?

Now I'm totally confused!!
Any help and advice appreciated!

Also is electric Under floor heating worth having?

 

[thorien]

Also One more question!

The tiles I've bought for the walls and floor say I should use Butech adhesive, anyone heard of this before? Can i use anything else or do I have to stick with this make?

 

[thorien]

Anyone?

 

[daddym]

Butech is just a brand name - personally I always trust BAL.

You have a few options:

Hardibacker 9mm or "no more ply" would be ok screwed securely onto the existing floor, helping to reduce flex.

WBP ply would also help reduce flex, but use minimum 12mm onto existing floor or 24mm without existing floor.

Personally I would use BAL fastflex 2 part adhesive. This would mean you wouldnt have to overboard at all. It is a highly flexible latex crumb adhesive.

Whatever you decide - Prime the floor (not with PVA) and make sure you use a flexible grout (such as BAL superflex with a GT1 additive).

If you are using porcelain tiles, make sure you use porcelain specific adhesive and grout too!

 

[goodmow]

Are you saying prime the ply first? and if so what would you prime it with if not PVA?

 

[gcol]

goodmow, this is covered in the tiling sticky.