MIL-HDBK-1001/SA
Section 1: INTRODUCTION
1.1 Scope. This 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.
1.2 Roof Design Synthesis. Roof-system design requires a synthesis of the following factors:
a) Suitably firm and stable surface for roofing;
b) Slope for drainage;
c) Fire resistance (refer to MIL-HDBK-1008, Fire
Protection for Facilities Engineering, Design, and Construction);
d) Wind-uplift resistance;
e) Thermal resistance;
f) Vapor control;
g) Life-cycle costing of available systems;
h) Ice dams and sliding snow;
i) Maintainability.
1.3 Roof-Mounted Equipment. Rooftop location of mechanical and electrical equipment should be avoided whenever practicable. Penthouses and covered ground level locations are preferred. Rooftop equipment creates many roofing problems:
a) Difficult flashing details;
b) Obstruction of drainage paths;
c) Increases hazardous rooftop traffic by repairment;
d) Makes roofing inspection, repair, and replacement more difficult.
1.4 Climatic Conditions. Varying climatic conditions have a big impact on roofing design. Vapor retarders are usually needed in cold climates and for buildings with high interior
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