wbp plywood


Postby pezandlea » Tue Apr 15, 2008 11:10 am

hi,
i wounder if u could help me,
i had builders in and they done my bathroom
i had a slight problem when my tiles started to crack in half on the wall. When i asked them wat they used they said wbp ply does it shrink or would putting pvc on wbp ply make it shrink at all.. hope u can help
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Postby rosebery » Sat Apr 19, 2008 11:02 am

How long ago was the bathroom fitted?

When did the cracking start?

If both relatively recent don't worry about asking what they did - tell 'em to come back and fix it!

For info though WPB (water and boil proof) ply doesn't shrink. They may have used too thin a sheet though. What do you mean by pvc? I have a feeling I know but I'd like you to confirm.

Cheers
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Postby stevenc1603 » Thu May 15, 2008 9:46 am

Let me guess, your builders sheeted the wall in ply and then use PVA glue to "seal" it?

If they did then there's basically a thin layer of glue that will barley be holding the tiles to the wall as PVA forms a skin. It doesn't penetrate the ply to form a proper bond. That coupled with the fact that it will go "live" as again when the wet tile adhesive hit it means it will have a sketchy hold at best.
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