Roofs - APP Membranes

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Roofs - APP Membranes

Division C - Accepted Materials

Roofs: APP Membranes

Accepted Materials for a RoofStar Guarantee

The tables and products shown below provide basic material data and links to more information about the materials, including manufacturers' published Technical Data sheets, but this information is not intended for use as a comparison of material performance or quality. It is the sole responsibility of the Design Authority to assess the performance capability and material suitability for specific design requirements.

The materials listed are those which have been accepted by the RoofStar Guarantee Program (RCABC Guarantee Corp., or RGC) for use in a roof or grade-level waterproofing system that will qualify for a RoofStar Guarantee. The acceptance of these materials by the RGC (RoofStar Guarantee Program) in no way reflects on the quality or performance of other materials not listed.

The materials and guideline specifications are listed under the name of the manufacturer and/or supplier of the primary membrane material, with the exception of BUR membranes for which the reader will find RoofStar Guarantee Program guidelines on traditional built-up roofing systems (BUR) incorporating organic and glass felt primary membranes.

Atactic polypropylene (APP) polymer modifiers are by-products of the polymerization of propylene gas into isotactic polypropylene (used for injection molding and extrusion). APP has a lower melting point and is more compatible with asphalt than isotactic polypropylene.
Bitumens modified with APP can display improved physical and mechanical properties. The improved properties are only possible if the APP is finely dispersed throughout the bitumen to avoid separation during manufacture and service.
APP modification of bitumens can impart the following changes in properties:
  • increased softening point
  • improved ultraviolet radiation resistance
  • improved low temperature flexibility
Click on a manufacturer's name to see the full list of their products accepted for use in the RoofStar Guarantee Program
Manufacturer Product Name System Test Type (Wind) Nominal Membrane Thickness (mm) Approximate Weight (Kg/m2) Reinforcement Material Reinforcement Material Weight (g/m2) Application
GAF Ruberoid® Torch Smooth Membrane
GAF Ruberoid® Torch Granule Membrane
GAF Ruberoid® Torch Plus Granule FR Membrane
GAF Ruberoid® EnergyCap Torch Granule FR Membrane
IKO Industries Ltd. Armourplast Classic
IKO Industries Ltd. Armourplast Granular

Accepted Materials