This guide supersedes the slope guidelines of Appendix X1 of Specification D 312.

Hot-applied roofing asphalt serves both as the waterproofing agent and adhesive for construction of built-up roofing membranes. There are many variables that may affect the performance of BUR membranes. This guide provides general specification guidelines for the asphalt only.

1. Scope

1.1 The purpose of this guide is to provide advice for the selection of asphalt used in the construction of built-up roofing (BUR). This guide does not address the use of asphalt in waterproofing, cold-applied, or modified bituminous roofing.

1.2 Reinforcements considered for use with roofing asphalt include ply sheets, (see Specifications D 226, D 2178, and D 5726), base sheets (see Specifications D 2626, D 4601, and D 4897), and cap sheets (see Specification D 3909). They consist of glass, organic, or synthetic fibers.

1.3 The use of asphalt in the placement of vapor retarders and rigid roof insulation also is addressed.

2. Referenced Documents (purchase separately) The documents listed below are referenced within the subject standard but are not provided as part of the standard.

ASTM Standards

D92 Test Method for Flash and Fire Points by Cleveland Open Cup Tester

D226 Specification for Asphalt-Saturated Organic Felt Used in Roofing and Waterproofing

D312 Specification for Asphalt Used in Roofing

D1079 Terminology Relating to Roofing and Waterproofing

D1863 Specification for Mineral Aggregate Used on Built-Up Roofs

D2178 Specification for Asphalt Glass Felt Used in Roofing and Waterproofing

D2626 Specification for Asphalt-Saturated and Coated Organic Felt Base Sheet Used in Roofing

D3791 Practice for Evaluating the Effects of Heat on Asphalts

D3909 Specification for Asphalt Roll Roofing (Glass Felt) Surfaced With Mineral Granules

D4601 Specification for Asphalt-Coated Glass Fiber Base Sheet Used in Roofing

D4897 Specification for Asphalt-Coated Glass-Fiber Venting Base Sheet Used in Roofing

D5726 Specification for Thermoplastic Fabrics Used in Hot-Applied Roofing and Waterproofing

Keywords

asphalt; built-up roofing; equiviscous temperature; glaze coat; interply bitumen; slippage; slope;

ICS Code

ICS Number Code 91.100.50 (Binders. Sealing materials)

Citing ASTM Standards

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