We now offer a formed Fiberglass Insulator with Heat Reflective top surface. The insulation rests on the edge of the tile that it is sitting on to keep the weight off the tiles. It is a rigid formed fiberglass material with a domed shape; water will simply run off of it keeping it dry. The top is a heat reflective material that also serves to limit water penetration through the product.
Ships in box of 4; product fits into standard 2' x 2' grid.