wbp ply bathroom floor???

[xr4x4]

Osb is normally coated with a waterproof layer.

Stuff I buy does anyway.

Edit.

Why does ply need to be boil proof anyway?

[JohnD]

Builders Merchants don't usually cut board to your preferred size, but DIY sheds often do. When I had some 18mm WBP flooring laid last year (got a good deal at Wickes) they don't cut it, but we collected it in the van and I got the joiner to cut it into 8' x 2' peces which were reasonably easy to carry upstairs and sling around. If you are a bit weedy I think you will find 4' x 2' pieces even easier. With careful measurement you will have very little extra cutting to do on site. Longer pieces are more rigid and less likely to need noggins. If it's a bathroom you can probably have it cut into pieces to fit the width. A DIY shed is often, but not always, more expensive than a timber yard.

It is easier to fit if you remove the skirting first so any uneven edges will be hidden afterwards.

A jig saw is very slow and will go blunt unless you buy TCT blades.

WBP (Water and Boil-Proof) ply is just very water resistant. When it was introduced, the makers used to have it in exhibitions with a piece immersed in a tub of boiling water to show how good it was (the old casein ply would have fallen apart)

[Tully]

thanks john but is CE 0407CPD 436 2x EN636 2 EN314 2 Ext E2 ply okay for the job ?

[Tully]

thanks john but is CE 0407CPD 436 2x EN636 2 EN314 2 Ext E2 ply okay for the job ?

[JohnD]

sorry don't know. One of the woodworkers will know I'm sure. You might do better to ask in http://www.diynot.com/forums/viewforum.php?f=14

[Richard C]

Personally I would advise you use only exterior grade EN 636-3, EN 636-2 is only moisture resistant.

When tiling or re-tiling, there are many things that can catch you out. With walls, you need to consider tile weights, prep & materials &, as you’re discovering. suspended timber floors need special consideration if you want to avoid early tile failure. I would advise you read the Tiling Sticky & Forum Archive posts before doing any more work or buying materials, it could prevent you making disastrous & potentially expensive mistakes. It’s also important to use only quality trade tilling materials of the correct type for your tiles & tile base; cheapo own brand & DIY stuff is mostly crap.

[JohnD]

Richard C wrote:

Personally I would advise you use only exterior grade EN 636-3, EN 636-2 is only moisture resistant.

Ah, that's useful to know! What's the difference in how it's made?

edited:
found it now
http://www.tradewood.co.uk/media/c345d690feca47abb74ee560931b1ecbPlywood%20Standards.pdf

you are recommending the EN 636-3 because it is a bathroom and liable to get repeatedly wet. And the old "WBP" descriptor seems to be out of date. Shame because it's so easy to understand and remember

[Richard C]

JohnD wrote:

you are recommending the EN 636-3 because it is a bathroom and liable to get repeatedly wet. And the old "WBP" descriptor seems to be out of date. Shame because it's so easy to understand and remember

Exactly; I still use “WBP” as I think it’s more meaningful to most folks than EN speak . The adhesive spec is also important for the tiling process which, in itself, involves using water based materials, you may get away with EN 636-2 but I think it’s better to be safe than sorry when tiling as failure can be very expensive.