We started this job last December 2011 it has 1800 sq ft of 11 inch pine in the upstairs and 500 feet of Herringbone rifted and quartersawn smoked oak downstairs all over radiant heated floors. We installed firring strips in between the pex then the concrete man came and poured the gypcrete in between my firring strips. We glued the floor down with Stauf pum940
http://www.staufusa.com/index.php/259/wood-flooring-adhesive.html?category=2&sub_category=1 These are pictures of the upstairs install took two days to prime the floor and glue/staple the floor down.
