'Oriented Strand Board' for Tile Underlay
Does anybody know the performance of OSB (1/2") sheeting for underlay on which I'll be installing ceramic tiles in a bathroom?
Normally I'd use fir ply but I have a couple of (4x8x 1/2") sheets of OSB that I'd like to use up.
There is lots of support under the sheeting so I'm not worried about any flexing but more about the effects of water...
Inevitably (especially in a bathroom) some water/humidity will work it's way under the tiles so I don't want the sheeting to start 'swelling', separating etc and causing the tiles to loosen.
Do you think I'll be safe to use the OSB or will I regret it...?