The basement slab area has been prepped with 10″ of levelled gravel, 6 mil sheet plastic, 2″ of styrofoam insulation, 6″ square metal wire grid and then the multitude of 1/2″ radiant heat pipes that form the basis for heating the basement. The exact pattern of these pipes is designed by a third party to ensure proper function and energy efficiency in the actual use of the finished product.