General Construction Specifications
PART 1 - GENERAL
01 SECTION INCLUDES
A. Single-ply EPDM and ballasted roofing system over rigid insulation.
02 REFERENCE STANDARDS
A. ASTM C136 - Sieve Analysis of Fine and Coarse Aggregates.
B. ASTM D412 - Test Methods for Rubber Properties in Tension.
C. ASTM D448 - Standard Sizes of Aggregate.
D. ASTM D624 - Test Method for Rubber Property-Tear Resistance.
E. ASTM D816 - Rubber Cements.
F. ASTM D1621 - Compressive Properties of Rigid Cellular Plastics.
1.02 QUALITY ASSURANCE
A. Materials furnished under this section shall be manufactured or approved in writing by a firm specializing in membrane roofing and able to demonstrate a minimum of five years successful experience.
1. Materials used shall be UL approved for the UL Design Assembly referenced on the Drawings.
B. Installer shall be approved in writing by the roofing materials manufacturer and able to demonstrate a minimum of three years successful experience in similar work.
C. There shall be no deviation from this specification and the approved shop drawings without prior written approval of the Architect and Roofing Manufacturer.
D. Upon completion of the installation, an inspection shall be conducted by an authorized Technical Representative of Roofing Manufacturer to verify that the roofing system has been installed in accordance with Roofing Manufacturer's most current published specifications and details, and approved shop drawings.
1.03 PRE-ROOFING CONFERENCE
A. Prior to starting roofing work, General Contractor shall set up a job-site meeting with the following in attendance:
1. Roofing Contractor
2. Architect
3. Roofing Materials Manufacturer's Representative
4. Trades related to roofing work such as plumbing and mechanical.
B. Review details and existing conditions. Conduct the meeting in accordance with Section 01200.
1.04 SUBMITTALS
A. Submit the following in accordance with Section 01340.
B. Product Data: Include data substantiating that materials comply with requirements of this section.
C. Samples:
1. Finished roofing sheets, including T-shaped side/end-lap seam.
D. Aggregate Ballast: One 12" x 12" x 4" box full of clean roof ballast as a standard of quality.
E. Shop Drawings: Showing roof configuration, including layout of tapered insulation material, sheet layout, seam locations, colors (as applicable), details at perimeter, and special conditions.
1.05 WARRANTY
A. Provide written warranty, signed by the manufacturer of primary roofing materials, agreeing to replace/repair defective materials and workmanship, including any leakage of wear, abnormal aging or deterioration of materials, and other failures of sheet roofing to perform as required within warranty period.
Repairs and replacements required because of acts of God and other events beyond Contractor/Installer/Manufacturer's control (and which exceeds performance requirements) shall be completed under the directions of the manufacturer and paid for by the Owner at prevailing rates.
1. Warranty period is ten (10) years after date of substantial completion for repair of leaks and twenty (20) years material warranty for deterioration of the membrane.
PART 2 - PRODUCTS
03 ACCEPTABLE MANUFACTURERS
A. General: Roofing system for the work of this section shall be Carlisle DESIGN "B" LOOSE-LAID SYSTEM, ballasted EPDM membrane, complete with all components and materials required for complete and watertight installations to meet project requirements and conditions.
1. All materials and accessories used with this roofing system must be of types and quality approved by Roofing Manufacturer.
B. Substitutions: The following manufacturers are acceptable subject to requirements of this section.
1. Firestone.
2. Goodyear.
04 ROOFING MEMBRANE
A. Type: Carlisle "SURE-SEAL" Non-Reinforced Black 60 mils EPDM (Ethylene Propylene Diene Monomer).
1. Tolerance on Nominal Thickness: +/- 10%, ASTM D412.
2. Tensile Strength: minimum 1300 psi, ASTM D412.
3. Ultimate Elongation: 350%, ASTM D412.
4. Tear Resistance: minimum 175 flb/in, ASTM D624
5. Factory Seam Minimum Strength: tested to membrane rupture, ASTM D816.
2.02 FLEXIBLE TUBING
A. Type: "ARMAFLEX" closed-cell synthetic rubber foam manufactured by Armstrong, 3-1/8" diameter.
2.03 ROOF INSULATION
A. Polyisocyanurate Foam Insulation Board: Tapered and flat board types as indicated on the drawings.
1. Density: 2.0 pcf
2. Thermal Resistance Value: R 6.7/inch
3. Compressive strength: (ASTM D1621) 25 psi
4. Tapered: Slope at 1/8" per foot, perimeter thickness as indicated on the drawings.
5. Flat Board: Thickness as shown on the drawings.
6. Crickets: Tapered board sloped at 1/4" per foot.
2.04 PROTECTIVE MAT
A. Type: HP protective mat as manufactured by Carlisle.
2.05 ROOF WALKWAYS
A. Precast concrete pavers: 4000 psi fiber reinforced concrete pavers, installed over protective mat as approved by membrane manufacturer.
1. Paver blocks shall be finished with a non-slip top surface and smooth bottom and be free of rough edges.
2. Size: 18 inches by 18 inches by 2 inches thick.
2.06 BALLASTS
A. Rock Type: River-washed gravel, free of organic material (ie: shells), smooth with limited fractures, ASTM D448 size No. 2, range size of 1-1/2" to 2-1/2" in accordance with ASTM C136 Sieve Analysis.
PART 3 - EXECUTION
05 PREPARATION OF SUBSTRATE
A. Comply with manufacturers instructions for preparation of substrate. Verify that penetrations, expansion joints, and blocking are in place and secured and that roof drains are properly clamped into position.
B. Clean substrate of dust, debris, and other substances detrimental to membrane installation. Remove sharp projections.
C. Install flashings and accessory items as shown, and as recommended by manufacturer.
06 INSULATION INSTALLATION
A. Extend rigid insulation full thickness in single, or multiple layers over surface to be insulated.
Cut and fit tightly around obstructions. Form cant strips, crickets, saddles, and tapered areas with additional material as shown and as required for proper drainage.
1. Stagger joints in one direction for each course. For multiple layers, stagger joints in both directions between courses with no gaps, to form a complete thermal envelope. Tape joints with Butyl tape equal to Polyken 612.
B. Do not install more insulation than can be covered with membrane before end of day or before start of inclement weather.
C. Set rigid insulation units loose on substrate and cover immediately with membrane. Limit joints between adjacent units to 1/4-inch maximum.
07 MEMBRANE INSTALLATION
A. Start installation in presence of manufacturer's technical representative.
1. Cut out and repair membrane defects at end of each day's work.
B. Install membrane by unrolling over prepared substrate, fastening at perimeter and at roofing penetrations. Lap adjoining sheets and bond, covering top edges of each sheet at seams with uniform fillet of sealant as recommended by manufacturer. Install flashings and counterflashings as shown and as recommended by manufacturer.
1. Apply aggregate ballast in uniform thickness at rate of 12 to 13 lbs. per sq.ft. Spread to minimize damage to membrane.
2. Install precast concrete paver ballast over protective mats in strict accordance with manufacturer's instructions and to minimize damage to mats or roof membrane.
C. Walkway Protection: Install paver units at locations shown and where required for access to roof-mounted equipment.
08 PROTECTION OF ROOFING
A. Upon completion of roofing, protect during remainder of construction period from damage or deterioration. Damaged roofing shall be repaired or replaced.
END OF SECTION
