Quantcast Section 1: Introduction - 1001_5a0011

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Roofing and Waterproofing

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MIL-HDBK-1001/5A
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)
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
1





 


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