OSB over Dimpled Membrane Question
Hi Ė Iíd like your opinions on what thickness of OSB I should use for a subfloor and whether the OSB should be T&G or butt-end. My plan is to use a product similar to Platon, DeltaFL, or Superseal and then install the OSB on top (duh) fastened with tapcons. Platonís installation instructions, for instance, require a minimum of 7/16 OSB, either butt end or T&G. However, Iím concerned that 7/16 is too flimsy, and that butt end may not provide enough rigidity (I couldnít find 7/16 T&G).
Aside from the head room savings between 7/16 and ĺ (half an inch is half an inch!), thereís also about a 7-8 dollar per sheet differentiation between 7/16 butt and ĺ T&G. Thoughts?
I plan to finish it with an engineered floor. The slab is relatively level with no obvious abnormalities, although once I get it cleaned out Iím going to hit it with a level everywhere I can.