ThermaShingle is designed for both new and existing roofs, installing directly onto eave shingles without penetrating the roof deck. We use a high grade commercial adhesive to affix our panels. Each three-sided raceway compresses heat trace cable against the panel, delivering more heat with significantly less cable than traditional zig-zag heat tape systems. This raceway also protects the cable from the elements, extending the life of your system far beyond legacy options.