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Membrane

There are various types of rubber or plastic sheet-type single-ply membranes available for low-pitch and flat roof installations. Some are mechanically fastened and incorporate a slip-sheet or separation sheet, while others are fully adhered to the roof substrate. The PVC (polyvinyl chloride) and TPO (thermoplastic olefin) membrane seams are generally heat-welded using hot air, although there are self-adhering products available. The EPDM (ethylene propylene diene M-class) membrane seams are sealed using an adhesive and roller. Some of these products have built-in UV protection, while others require subsequent coatings as they age. These products offer the building owner and contractor a significant advantage in the area of lessened liability because they require no open flame on the roof. Some of the available membrane roof systems are:

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The Process

 

 

ROOFING PRODUCTS

 

Pitched Roofs

 

Low-Pitch / Flat Roofs

 

► BUR

 

► Membrane

 

► Roof Coatings

 

► Torchdown

 

 

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Pros

  • Carlisle SynTec
  • Cooley Group
  • FiberTite Seaman Corporation
  • Flex Roofing Systems
  • GAF Materials Corporation
  • GenFlex Corporation
  • IB Roof Systems
  • Mule-Hide Products Co. Inc.
  • POLYGLASS
  • Versico LLC
  • WeatherBond

www.carlisle-syntec.com

www.cooleygroup.com

www.fibertite.com

www.flexroofingsystems.com

www.gaf.com

www.genflex.com

www.ibroof.com

www.mulehide.com

www.polyglass.com

www.versico.com

www.weatherbondroofing.com

Below are links to several manufacturers’ sites. Remember that manufacturers’ web sites are designed to promote their products and will generally provide you with only positive product information.

You can count on Seattle Roof Advisor to provide unbiased advice.

Cons

The membrane roof systems are generally considered to be the most advanced roofing systems available for low-pitch and flat roofs. The PVC roof system in particular, with its ability to withstand ponding water and its resistance to UV rays, may well provide something that has been long missing from the flat roof industry –a permanent roof system. Although the up-front cost is clearly greater, it is difficult to overstate the value to the homeowner of removing themselves from the 10- to

15-year roof replacement cycle.  

Type

Heat

Welded

UV
Protection

Ponding

Water

Exclusion

Manufacturer's

Warranty

(Years)

EPDM

No

No

Yes

10

PVC

Yes

Yes

No

15 - 25 – Commercial

Lifetime – Residential

TPO

Yes

Yes

Yes

10