Adhesive seams are subject to contamination and degradation from a variety of rooftop conditions - even water. Thus, the weatherability benefit in EPDM membranes is often offset by exposure-related seam failures.

In contrast, Hot Air Weldable Membrane weathers as well as EPDM and has the seam strength advantages of hot-air-welding, including a year round installation capability, when compared to liquid adhesive-seamed systems which cannot be installed in cold weather.

In addition, Hot Air Weldable Membrane contains no plasticizers and therefore does not suffer any of the problems associated with the plasticizer migration or membrane shrinkage that some PVC membranes have experienced.

REINFORCED

All Hot Air Weldable Membrane Roofing Systems are reinforced with a high-strength, polyester reinforcing scrim for added strength and durability. This gives Hot Air Weldable Membrane:

• 5 times the tear strength of reinforced EPDM.
• 2.5 times the breakage strength of reinforced EPDM (225 lbs. Vs. 90 lbs.)
• Equal or superior ASTM physical property test results when compared to reinforced black rubber membranes.
• 45 mil (1.14mm) Hot Air Weldable Membrane provides the same puncture resistance as some 48 and 60 mil (1.22 and 1.52mm) PVC's.
• 60 mil (1.52mm) Hot Air Weldable Membrane provides nearly twice the puncture resistance as some 60 and 90 mil (1.52 and 2.44mm) PVC's.
• 45 mil (1.14mm) Hot Air Weldable Membrane has twice the tear strength of some 48 mil (1.22mm) PVC's.

ENERGY SAVINGS

A white Hot Air Weldable Membrane Roofing System reflects the sun's heat and can thereby help to reduce air-conditioning costs.

Hot Air Weldable Membrane Roofing Systems are engineered to require minimal maintenance. Should damage occur, Hot Air Weldable Membrane Roofing Systems can be easily repaired.

Hot Air Weldable Membrane Walkway Roll is designed to minimize the abrasion and mechanical damage to roof membranes caused by rooftop traffic. The walkway roll is manufactured with the same unique TPO formula used for Hot Air Weldable Membrane Roofing System and offers durability, weatherability, ease-of-use and the strength of hot air welded seams. Hot Air Weldable Membrane Walkway Roll can be installed over either 45- or 60-mil EP membrane.

Most Hot Air Weldable Membrane Roofing Systems have achieved UL Class A fire resistance classifications (UL 790) at slopes equal or superior to all standard and most fire resistant EPDM sheets: ? in. (19mm) slope over most isocyanurates, up to 1-in. (25.4mm) over selected iso boards, and unlimited slope over gypsum. Consult the current UL Roofing Materials & Systems Directory (where Hot Air Weldable Membrane is listed as a TPO) for a complete listing of ratings. Mechanically attached Hot Air Weldable Membrane has achieved Factory Mutual Windstorm Classification Rating of 1-60, 1-90, 1-120, 1-135, 1-150, and 1-195. Fully adhered Hot Air Weldable Membrane can achieve 1-180 and 1-270 Windstorm Classifications under specific conditions. Consult the current FM Approval Guide for a complete description of all approved assemblies.

*CSI Division 7 Specifications are available for each of the attachment methods listed.

The following is a partial list of major companies that have Hot Air Weldable Membrane Technology on their roofs: