Tiling bathroom would it need boarding?

[bettz1]

Hi we're looking at getting our bathrooms tiled and we've had 3 quotes so far,and they all seem to disagree with if the upstairs bathrooms need boarding down.

Lifted up the vinyl and this is what it looks like underneath

The first plumber said adhesive glue would be fine, whereas the other said he wont do it unless boarding goes down as after a while they'll be movement.

Any advice

 

[foxhole]

So whats underneath pics shows nothing of worth, how thick is it, probably just thin ply put down to take vinyl and nailed, useless to tile onto.

 

[bettz1]

So whats underneath pics shows nothing of worth, how thick is it, probably just thin ply put down to take vinyl and nailed, useless to tile onto.

Yes I'd say its thin ply barely 5mm maybe 6mm.We dont mind paying extra for boarding it's just confusing as to if we go with a tiler who wants to put it down or not

 

[foxhole]

Needs a minimum of 12mm ply screwed and glued to floorboard or you risk tile snapping etc.

 

[motorbiking]

There is a foam filled tile board available that is very good for supporting tiles.. The only issue is the possible height difference it might create at the threshold to the next room. Its also completely water proof.

 

[bettz1]

We've had 3 quote's today 1 who said he'd use 6mm backer boardb Then the other 2 who wouldnt use anything as I wouldn't need it just flexi adhesive

 

[foxhole]

We've had 3 quote's today 1 who said he'd use 6mm backer boardb Then the other 2 who wouldnt use anything as I wouldn't need it just flexi adhesive

Hardibacker is fine provided underneath is sound.
Tell the other two it’s time to hang up their spurs.

 

[Keithmac]

The more it flexes the more chance you have of breaking the tiles.

Do it right or do it twice!.

 

[bettz1]

We've gone with the guy who wants to put backer boarding down first.Thanks for the advice

 

[Keithmac]

Sounds like the best bet!, cheapest isn't normally best.

 

[Doggit]

You've made the best choice out of the 3, but it still may not be the best solution. It's only when you take the floor up, and look at it properly will you know what's needed. Foxhole suggest 12mm, but if the floors solid, then 6mm screwed and glued, plus flexible adhesive should work. Obviously, 12mm will be more of a belt and braces approach, but may raise the floor level too much, and that's when you'd lift the boards, and go with marine ply. Check the tilers T&Cs, and make sure you can retain something to prove the jobs okay; and have you seen some of his other work.