Alliance Blog

Roof Expert Witness – Roof Membranes, Roofing Systems, and Roof Assemblies

August 9th, 2010

The roof membrane is the top waterproofing membrane on a roof. The roof membrane typically identifies the roofing system. For example, a Fully Adhered TPO roofing system would be a Thermoplastic TPO membrane which is fully adhered to the insulation below.

A roofing system is comprised of a roof membrane, typically installed over some type of insulation or hard board. These insulations range from wooden roof decks, wood fiberboard, perlite, fiberglass, high density gypsum board, poly isocyanurate, or Styrofoam. The most prominent roof membranes include asphalt and cedar shake shingles, roofing tiles of various forms, slate, metal roofing, asphalt built up roofing, single ply membranes, sprayed polyurethane foam, and modified bitumen membranes. All of these membranes have different physical properties and their resistance to hail impact differs greatly. The roofing system includes all parts of the roofing system on top of the roof deck.

A roof assembly includes the roofing system and the structural roof deck assembly.

This entry was posted on Monday, August 9th, 2010 at 9:22 pm and is filed under Roof Inspection, Roof Repair Project, Roof Replacement Project, Roofing Expert Witness, Roofing Specifications. You can follow any responses to this entry through the RSS 2.0 feed. Responses are currently closed, but you can trackback from your own site.

Alliance Consulting & Testing, Inc. Indiana based independent roofing consulting and materals testing firm. Providing unbiased roof consulting to clients regarding roofing, waterproofing and more

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