I have a current gypcrete-over-radiant-over-foamboard-over-slab floor in my unfinished basement. I'm about to frame it out to finish it.
I've already located all the tubing, and I do have spots where I can nail or screw most of the walls down. Three questions for the experts:
If I want to use powder-actuated-nails into the gypcrete, I can't buy nails long enough to go through the gyp and insulation all the way into the concrete slab. Since these are non-load-bearing walls, seems ok if I just get the nail into 1.5" of gypcrete to hold them in place?
Would you apply an anti-fracture membrane (redguard or similar) under the sill plates in order to minimize spalling where the nail goes through?
On the couple walls I need to glue down, I've read that an anti-fracture-membrane first and then construction adhesive will work. Does anyone have products they recommend that work together? (the AFM with the adhesive, like would loctite PL stick to redguard?)
My other option is 5" or maybe even 6" screws which I think will get all the way to the concrete slab, but that seems like a lot of effort for 1300 sqft of walls. If I have to use screws, what screws do you recommend?
I did send email and a phone call to Maxxon, and they never replied, and my heating contractor doesn't have any info either.