Z--KLGO PANTHEON/RED FRONT ROOF RECOVER

KLGO 331433A POLYVINYL-CHLORIDE ROOFING April, 2026 07 54 19 - 1 07 54 19 POLYVINYL-CHLORIDE ROOFING PART 1 GENERAL 1.1 SUMMARY: This section identifies the parts and execution required for the recover roofing system to be installed over an existing membrane. A. Membrane Type: PVC thermoplastic membrane 1. Roll Width: 60" (Installed widths may vary) 2. Membrane Color: Light Grey (60 mil Gloss Side Up) 3. Attachment Type: Mechanically Fastened 4. Fasteners: Extra Heavy Duty Screw (#14) 5. Plates: Steel Membrane Plate 6. Termination Bars: Aluminum B. Cover Board Type: Gypsum-Fiber Roof Board 1/4-Inch (Securock or equal) 1. Attachment Type: Loose-Laid C. Existing Roof Type: Mod Bit 1. Existing Roof Thickness: .5" 2. Core Samples: No (Cores must be taken to verify thickness of existing assembly) 3. Attachment Type: Adhered D. Deck Type: Wood Plank Deck (1/2 in.) (Verify Wood Deck Thickness & Pull Tests) E. Prefabricated flashings, corners, parapets, stacks, vents, and related details. F. Fasteners, adhesives, and other accessories required for a complete roofing installation. 1.2 REFERENCES A. ASTM INTERNATIONAL (ASTM) 1. (2019) Standard Test Methods for Coated Fabrics (D751) 2. (2021) Standard Specification for Poly(Vinyl Chloride) Sheet Roofing (D4434/D4434M) 3. (2022) Standard Specification for Faced Rigid Cellular Polyisocyanurate Thermal Insulation Board (C1289) 4. (2020) Standard Test Methods for Fire Tests of Roof Coverings (E108) 5. (2020) Standard Test Methods for Fire Tests of Building Construction and Materials (E119) B. UL SOLUTIONS (UL) 1. (2021) UL Roofing Systems (TGFU.R10128) C. AMERICAN SOCIETY OF CIVIL ENGINEERS (ASCE) 1. (2007) Minimum Design Loads for Buildings And Other Structures (ASCE Standard - ASCE/SEI 7-05) 2. (2014) Minimum Design Loads for Buildings and Other Structures (ASCE Standard - ASCE/SEI 7-10) -- 1 of 11 -- KLGO 331433A POLYVINYL-CHLORIDE ROOFING April, 2026 07 54 19 - 2 3. (2017) Minimum Design Loads and Associated Criteria for Buildings and Other Structures (ASCE Standard - ASCE/SEI 7-16) D. NATIONAL ROOFING CONTRACTORS ASSOCIATION (NRCA) 1. (2019) NRCA Roofing Manual - Membrane Systems 1.3 SYSTEM DESCRIPTION A. General: Provide installed roofing membrane and base flashings that remain watertight; do not permit the passage of water; and resist specified uplift pressures, thermally induced movement, and exposure to weather without failure. B. Material Compatibility: Provide roofing materials that are compatible with one another under conditions of service and application required, as demonstrated by roofing membrane manufacturer based on testing and field experience. C. Sustainability: 1. Conform to NSF/ANSI Standard 347, “Sustainability Assessment for Single-Ply Roofing Membranes. Minimum certification level: Platinum. 2. Type III product-specific Environmental Product Declaration. 3. Membrane is recyclable at end of use. D. Physical Properties (must meet or exceed): 1. Roof product must meet the requirements of Type III PVC sheet roofing as defined by ASTM D4434. 2. Thickness: 60 mil, nominal, in accordance with ASTM D751. 100% same PVC material above and below reinforced scrim. No filler material is authorized. Membrane will be reinforced with a high-strength, weft-inserted polyester, rip resistant scrim that has a minimum thread pattern of 18 x 14 threads per square inch. 3. Thickness over Scrim: ≥ 28 mil in accordance with ASTM D7635. 4. Breaking Strength: ≥ 438 lbf. (machine direction) and ≥ 390 lbf. (cross machine direction) in accordance with ASTM D751 Grab Method. 5. Elongation at Break: ≥ 31% (machine direction) and ≥ 31% (cross machine direction) in accordance with ASTM D751 Grab Method. 6. Seam Strength: ≥ 431 lbf. in accordance with ASTM D751 Grab Method. 7. Tear Strength: ≥ 132 lbf. (machine direction) and ≥ 163 lbf. (cross machine direction) in accordance with ASTM D751 Procedure B. 8. Low Temperature Bend: Pass at -40 °F in accordance with ASTM D2136. 9. Heat Aging: Pass after being conditioned for 56 days in oven maintained at 176 °F in accordance with ASTM D3045. 10. Accelerated Aging: Pass after 10,000 hours of total test time in accordance with ASTM G155. 11. Dimensional Stability: Change of -0.45% (machine direction) and -0.20% (cross machine direction) in accordance with ASTM 1204. 12. Water Absorption: < 2.6% at 158 °F for 168 hours in accordance with ASTM D570. 13. Static Puncture Resistance: ≥ 56 lbf. in accordance with ASTM D5602. -- 2 of 11 -- KLGO 331433A POLYVINYL-CHLORIDE ROOFING April, 2026 07 54 19 - 3 14. Dynamic Puncture Resistance: ≥ 14.7 ft-lbf. in accordance with ASTM D5635. E. Cool Roof Rating Council (CRRC) (Membrane must be listed on the CRRC website): 1. Solar Reflectance (Initial): ≥ 39% 2. Solar Reflectance (3-Year Aged): ≥ 33% 3. Thermal Emittance (Initial): ≥ 89% 4. Thermal Emittance (3-Year Aged): ≥ 89% 5. Solar Reflectance Index (SRI) (Initial): ≥ 43% 6. Solar Reflectance Index (SRI) (3-Year Aged): ≥ 35% 1.4 SUBMITTALS A. Product data sheets to be used, with the following information included: 1. Preparation instructions and recommendations 2. Storage and handling requirements and recommendations 3. Installation methods 4. Maintenance requirements B. Sustainability Documentation: 1. NSF/ANSI Standard 347 Certificate 2. Type III product-specific Environmental Product Declaration C. Wind Uplift Calculations: Provide wind uplift pressures calculated according to the current edition of the ASCE-7 Specification Minimum Design Loads for Buildings and Other Structures. D. Shop Drawings: Indicate cover board pattern, overall membrane layout, field seam locations, joint or termination detail conditions, and location of fasteners. E. Provide verification samples for each product specified (two samples representing each product, color and finish): 1. 4-inch by 6-inch sample of roofing membrane, of color specified. 2. 4-inch by 6-inch sample of walkway pad. 3. Termination bar, fascia bar with cover, drip edge, and gr…