After years of a shop with no heat we spray foamed and lined the inside. What a great improvement! I couldn't stop there and decided to bite the bullet and have the combination boiler installed to heat the floor and potable water. Just finished today. The heat seems to be working great as the...
davesly -did you create a thickers section of concrete around the perimeter of the slab? Also, did you bury any insulation below the slab at the sides?
