APP (Attic Polypropylene) modified asphalt roofing membranes are reinforced with polyester and/or fiberglass mat offering excellent tensile strength and dimensional stability. APP membranes can be heat-welded or cold-applied and are meant to be applied directly over an acceptable substrate or as part of a multi-ply system. Consider modified bitumen as a combination of the previous two materials. Modified bitumen consists of multiple layers of tar or asphalt that has been combined with polymers similar to those found in single-ply applications. Modified bitumen is applied in rolls. We use "hot" a method for adhesion, such as torches (open flame).
Home roofing by Dunn Contracting for the roof on your home.
Dunn Contracting is a roofing company that installs flat roofs on residential homes. Flat roofing and roof repair in St. Petersburg.
Dunn Contracting installs a (secondary water barrier) base underlayment Certainteed BlackDiamond base and white APP mineral surfaced CertainTeed Flintlastic GTA thickness of (168 mils) membrane to flat roof.
These are important options often disregarded. Rigid or Tapered insulation are critical for achieving slope for drainage and energy savings for roofs which do not comply with such specifications. Home roofing by Dunn Contracting for the roof on your home.
These are the "creme de la creme" in the asphalt applications. Such products are upgraded with SBS rubber additives ensuring physical endurance through better expansion, flexibility, higher fire rating and self-sealing options. Modified Bitumen can be installed with traditional hot asphalt or cold applied adhesives. Be sure to ask about Modified Bitumen upgrades when your next roof is installed. Home roofing by Dunn Contracting.
Self-Adhering Roofing system
A self-adhering roofing system is comprised of a self-adhering ply base with a top surface designed to accept a self-adhering roofing membrane, a self-adhering mid ply and a self-adhering cap sheet and the roof system specifications have been engineered to provide roofs that offer excellent longevity and performance.