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

Table 3

Fasteners for Steep Roofing

ROOF MATERIAL FASTENER REQUIREMENTS

Asphalt

Roll Roofing

No. 11 or 12 gauge hot dipped galvanized

3/8-inch (10-millimeters) minimum heads,

shank length long enough to penetrate

through the roofing and deck or at least

3/4 inch (19 millimeters) into a plywood or

lumber deck.

Clay or

Concrete Tile

No. 11; galvanized, yellow metal or stainless steel, shanks to penetrate minimum 3/4 inch (19 millimeters) into sheathing or through it.

Asphalt

Shingles

No. 11 or 12 gauge, hot-dipped galvanized,

3/8-inch (10-millimeter) minimum heads,

with shank length long enough to penetrate

through the roofing and through a wood

panel deck or at least 3/4 inch (19

millimeters) into a lumber deck.

Wood Shakes, Shingles Rust-resistant, galvanized or aluminum nails, l4 gauge, 3d x 1-1/4 inch (32 millimeters) long for 16-inch (406- millimeters) and 18-inch (457-millimeter) shingles or shakes; 14 gauge, 4d x 1-1/2 inch (38 millimeter) long for 24-inch (610- millimeter) shingles or shakes.

Slate Copper slating nails only. 3d up to 18- inch (457-millimeter) long slates, 4d for

18-inche (457 millimeters) and longer slates, 6d nails at hips and ridges. Minimum length = 2 x slate thickness + 1 (e.g., 1-1/2 inch (38 millimeter) minimum length for 1/4-inch (6-millimeter) slate).

NOTE: "Hot" roofs in cold regions should slope 4 inches per foot (33 percent) or more (with backnailing) and have eave overhangs of less than 12 inches (305 millimeters) to minimize ice dam problems.