The VELUX EDL S01 0100B is a lowprofile copper step flashing for a deckmount skylight that comes with adhesive underlayment. The copper step flashing is intended to provide a weathertight seal for roof windows or deck mounted skylights which are installed on roofs that have thin roofing materials like fiberglass shingles, cedar shingles, slate, shakes, or asphalt. For proper water drainage, each piece of this flashing kit is interwoven with a layer of roofing material. Also, no sealants or caulk are needed. This model is specifically designed for roofs with slopes from 14deg; to 85deg;.