With the temperatures reaching over 100 degree last week, we worked on the radiant heat flooring. It is a product by Warmboard that is 1-1/4" thick. It has a plywood base, with a sheet of aluminum over the top with grooves to accept tubing. The tubing will be filled and heated and the heat will spread over the aluminum to create an even distribution. This is very efficient way of heating. The interior spaces were actually quite cool during the hot, humid days last week.