Pitched roof underlayment provides a secondary water-shedding layer beneath the finished roof covering. Spycor Building Products carries Dörken DELTA-VENT S, a three-layer synthetic membrane that resists bulk water while allowing water vapor to escape by diffusion, plus DELTA-TILAXX adhesive.
Roofing contractors, residential builders, and general contractors can compare roll coverage and installation requirements for new construction and reroofing. DELTA-VENT S is listed in 804-square-foot rolls. Confirm roof slope, covering compatibility, fastening, and overlap details with the manufacturer before ordering.
