SECTION 07115 ASPHALT MASTIC DAMPPROOFING ... - mavcon

PART 3 - EXECUTION
3.1 EXAMINATION
A. Acceptance of Surfaces and Conditions: Examine substrates to receive asphalt shingles and
associated Work for compliance with requirements and other conditions affecting performance.
Proceed only when unsatisfactory conditions have been corrected in a manner complying with
Contract Documents. Starting Work within a particular area will be construed as acceptance of
surface conditions.
B. Verify that substrate is sound, dry, smooth, clean, and securely anchored.
3.2 PREPARATION
A. Clean substrates of substances harmful to insulation, including removing projections capable of
interfering with insulation attachment.
3.3 INSTALLATION, GENERAL
A. Installation Quality Standards: In addition to standards listed elsewhere, perform Work according
to following, unless otherwise specified:
1. ARMA's "Residential Asphalt Roofing Manual" recommendations.
2. NRCA's "The NRCA Roofing and Waterproofing Manual" recommendations.
3. Respective manufacturer's installation instructions.
4. Approved submittals.
5. Contract Documents.
3.4 INSULATION INSTALLATION
A. Procedures: Install in 2 layers to achieve thermal value specified.
1. Install bottom layer of felt faced insulation to deck using mechanical fasteners, with long
sides in a continuous straight line perpendicular to roof decking flutes, with end joints
staggered between rows, abutting edges and ends between boards.
2. Install top layer of oriented-strand-board faced insulation using mechanical fasteners,
with joints of top layer staggered from joints of bottom layer not less than 6 inches in
each direction.
3. Fill gaps exceeding 1/4 inch with insulation.
4. Cut and fit within 1/4 inch of nailers, projections, and penetrations.
3.5 UNDERLAYMENT INSTALLATION
A. Procedures:
1. Apply primer if required by manufacturer.
2. Apply over entire roof surface wrinkle free, in shingle fashion to shed water, and with
end laps of not less than 6 inch staggered 24 inches between courses.
3. Overlap edges not less than 3-1/2 inches and roll laps with roller.
4. Cover underlayment within time period required by manufacturer.
Central Fire Station, Temple, TX August 17, 2009
WHJ Architect Project No. 083 8 Asphalt Shingles - Alternate No. I 07311 - 5