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PART 1 - GENERAL 1.01 SUMMARY: A. Furnish labor, materials, equipment and services to provide Perlite
Concrete Roof Deck Insulation over existing roof, complete in place as shown on
the Drawings. B. Provide 1/4 inch slope-to-drain and crickets as indicated on Roof Plan.
C. Performance Requirements: Minimum nail holding power of 50 pounds per
fastener. 1.02 WORK BY OTHERS: A. Framing or forming at edges, openings, edge angles, pitch pans, structural
expansion joints, flashings, curbs, roof drains, vents shall be installed by
others. 1.03 REFERENCES: A. ASTM C150 Specification for Portland Cement. B. ASTM C157 Test Method for Length Change of Hardened Hydraulic-Cement
Mortar and Concrete C. ASTM C 332 Specification for Lightweight Aggregate for Insulating
Concrete. D. ASTM C 578 Specification for Preformed, Cellular Polystyrene Thermal
Insulation. 1.04 QUALITY ASSURANCE: A. Applicator shall be approved by the manufacturer and have five years
continuous installation experience. B. Applicator shall have successfully completed three jobs, minimum, within
the past two years, using the same type of system specified which shall be
available in the Albuquerque area for inspection and evaluation. 1.05 SUBMITTALS: A. Complete Shop Drawings including insulation thicknesses, crickets, slope,
cross section. B. Statement of qualifications (if required). 1.06 PRE-ROOFING CONFERENCE: A. A representative of the Perlite Concrete System Applicator shall be
present at the pre-roofing conference for examination and acceptance of the
completed substrate as being suitable to receive the system. PART 2 - PRODUCTS 2.01 MATERIALS: A. Portland Cement: ASTM C150 Type I, II or III, Domestic brand delivered to
site in bulk containers. B. Air-Entraining Admixture: As recommended by manufacturer. Do not use
pre-generated foam or similar mixtures that produce foam concrete. C. Perlite Aggregate: ASTM C332, Group I. D. Insulation: Rigid polystyrene boards or formed units with minimum density
of 1 pcf complying with ASTM C 578. Provide units with keying holes of
approximately 3 percent of board gross area. E. Fiber Reinforcement: Fiber 15 Denier - 3/4 inch polyester. F. Water: Clean, potable. 2.02 PERFORMANCE: A. Drying shrinkage shall not exceed .025 inches at 180 days per ASTM C157.
PART 3 - EXECUTION 3.01 INSTALLATION: A. Mix insulating concrete with equipment specifically designed for the
mixing of the insulation system. B. Place insulating concrete in accordance with manufacturer's instructions,
using equipment and procedures to avoid segregation of mix and loss of air
content. Do not vibrate or work mix except for screeding or floating. C. Install a 1/8 inch minimum thick slurry coat over existing roof and embed
polystyrene in a brick-like manner. Design thickness of polystyrene to meet
slope-to-drain conditions indicated. D. Deposit and screed perlite concrete mixture in a continuous operation,
until an entire section of the roof is complete. Install a 2 inch nominal
thickness of perlite concrete over the polystyrene insulation board. Install
crickets as shown on roof plan of as necessary for positive drainage to roof
drains. Steel trowel the entire surface to a smooth even finish, free of
depressions with no defects. 3.02 SLOPE AND DRAINAGE: A. Provide positive drainage for finished roof. The criterion for judging
proper slope for drainage is that there be no standing water on the roof 48
hours after a rain, during ambient drying conditions. To satisfy this
requirement, NRCA recommends that designers make provisions in their roof design
for positive slope. 3.03 PROTECTION AND CLEAN UP: A. Roof deck insulation contractor shall protection rooftop equipment in a
way to prevent concrete splatters from contacting equipment. B. Remove spots, smears, stains, residues, etc., from the work of this
Section and/or upon adjacent areas or surfaces which result from the work of
this Section. C. Dispose of debris, trash, containers, residues and scraps to a legal
dumpsite. 3.04 FIELD QUALITY CONTROL: A. Unacceptable substrate conditions shall be completed before work of this
Section is started. B. After work of this Section is complete, Architect, roofing contractor and
the roofing manufacturer shall examine perlite concrete roof deck insulation
system installation. Work found not acceptable shall be correct at contractor's
expense to the Architect's acceptance. END OF SECTION 07222. PERLITE CONCRETE ROOF DECK INSULATION
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