Thanks Harold for the info on wall construction. I'm also looking for values for floor materials such as 3/4" plywood (subfloor), 3/4" particle board (underlayment) 5/16" finished laminate flooring + 1/8" insulating foam. I want to do detailed calculations for retrofitting hydronic radiant tubing under floor.
p.s. I've been to your "hydronic.net" site many times and am using the Flash4 calculator.