MIL-HDBK-1001-5 Roofing And Waterproofing S/S By Mil-Std-3007This handbook sets forth guidelines for design of roofing, LAYOUT 1 and waterproofing systems for building construction. It covers design of new low-slope and steep roof systems, reroofing of existing buildings, and waterproofing, and dampproofing systems.

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MIL-HDBK-1001/5A

5.2       General Requirements

5.2.1     Felts.  Organic felts are highly vulnerable to

moisture-induced deterioration; use the more durable fiber glass

felts.  Organic felts can, however, be used in temporary

membranes that are to be removed or in coal-tar pitch membranes.

5.2.2     Modified Bitumen Flashing.  Single-ply modified bitumen sheets may be used for flashing material.

5.2.3     Compatibility.  Check with the manufacturer of built-up roofing membrane and flashing materials to assure that proposed roof system and materials are compatible with roof deck, vapor retarder, insulation, and geographic location.

5.3       Membrane Design Recommendations

5.3.1     Bitumen Slope Limits

Require bitumen manufacturer to provide equiviscous temperature (EVT) stenciled on every bitumen container or tanker weight bill to facilitate application at proper viscosity.

5.3.2     Flashing Design Principles.  Good flashing design requires the following:

a)  Elimination of as many penetrations as practical;

b)  Location of individual roof penetrations at least

18 inches (457 millimeters) apart;

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