NFGC-07310 (August 1983)
3.1 SURFACES AND CONDITIONS: Do not apply shingle roofing on surfaces that are unsuitable or
that prevent a satisfactory application. Ensure that roof is smooth, clean, dry, and without loose knots.
Cover Knotholes and cracks with sheet metal nailed securely to the sheathing. Properly flash and secure
vents and other roof projections and drive projecting nails firmly home.
3.2 APPLICATION: The manufacturers written instructions shall be followed for applications not
listed in this specification and in cases of conflict with this specification.
3.2.1 Underpayment (for Roof Slopes 4 Inches Per Foot and Greater): Apply underpayment consisting
of one layer of NO. 15 asphalt-saturated felt to the roof deck. Lay felt parallel to roof eaves continuing
from eaves to ridge, using 2-inch head laps, 6-inch laps from both sides over all hips and ridges, and
4-inch end lays in the field of the roof. Nail felt sufficiently to hold until shingles are applied. Turn
underpayment up vertical surfaces not less than 4 inches.
3.2.1 Underpayment (for Roof Slopes (Between 2 inches and 4 inches Per Foot) (4 Inches Per Foot and
Greater)): Apply underpayment consisting of two layers of No. 15 asphalt-saturated felt to the roof deck. (J)
Provide a 19-inches wide strip of felt as a starter sheet to maintain the specified number of layers
throughout the roof. Lay felt parallel to roof eaves continuing from eaves to ridge, using 19-inch head
laps in the field of the roof. Nail felt sufficiently to hold until shingles are applied. Confine nailing to
the upper 17 inches of each felt. Turn underpayment up vertical surfaces not less than 4 inches.
3.2.2 Metal Drip Edges: Provide metal drip edges as specified in Section 07600, Flashing and Sheet
Metal, applied directly on the wood deck at the eaves and over the underpayment at the rakes. Extend
back from the edge of the deck not more than 3 inches and secure with fasteners spaced not more than
10 inches on center along the inner edge.
(3.2.3 Eaves Flashing (for Roof Slopes 4 inches Per Foot and Greater): Provide eaves flashing strips
consisting of 55 -pounds or heavier smooth-surface roll roofing. The flashing strips shall overhang the
metal orip edge 1.4 to 3.8 inch and extend up the slope far enough to cover a point 12 inches inside the
interior face of the exterior wall. Where overhangs require flashings wider than 36 inches, locate the
laps outside the exterior wall face. The laps shall be at least 2 inches wide and cemented. End laps shall
be 12 inches and cemented.)
Figure 2-11.Sample page from a NAVFACENGCOM guide specification.
The following specifications establish
requirements mainly in terms of performance.
Referencing these documents in project specifications
assures the procurement of economical facility
components and services while considerably reducing
the number of words required to state such
Federal and Military Specifications
Federal specifications cover the characteristics of
materials and supplies used jointly by the Navy and
other government agencies. These specifications do
not cover installation or workmanship for a particular
project, but specify the technical requirements and
tests for materials, products, or services. The
engineering technical library should have all the
commonly used federal specifications that are
pertinent to Seabee construction.
Military specifications are those that have been
developed by the Department of Defense (DoD). Like
federal specifications, they also cover the characteristics
of materials. They are identified by DoD or MIL
preceding the first letter and serial number.
Technical Society and Trade
Technical society specifications should be
referenced in project specifications when applicable.