I was told to tape the seam with Aluminum tape thats used on A/C ducting .In no way shape or form would I use 500 mph tape as it will deteriorate over time and isnt a vapor barrier.Good luck with your build.:drool:
If Im reading correctly for my 21 x 40 slab with hydronic heating(in floor Pex)I will put the insulation on the bare ground and put the plasic vapor barior on top of it, then rebar in that order?I live in NY State:lol_hitti Im new and need good teachers Thanks...