SECTION 07540
PVC THERMOPLASTIC MEMBRANE ROOFING
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Copyright 2003 - 2011 ARCAT, Inc. - All rights reserved
** NOTE TO SPECIFIER ** Duro-Last Roofing, Inc.; reinforced PVC membrane roofing, fully adhered and mechanically fastened.
This section is based on the products of Duro-Last Roofing, Inc., which is located at:
525 Morley Dr. P. O. Box 3301
Saginaw, MI 48601
Toll Free Tel: 800-248-0280
Tel: 989-753-6486
Fax: 800-432-9331
Email: request info ()
Web: www.duro-last.com
[ Click Here ] for additional information.
Duro-Last Roofing, Inc. is the pioneer and one of the largest manufacturers of custom prefabricated roofing systems. The system is prefabricated in the Duro-Last manufacturing plants to meet the specific roofing needs of each project. 80 to 85 percent of field seams and other critical areas are welded under ideal factory conditions, greatly reducing the possibility of rooftop installation error.
The Duro-Last roofing system meets or exceeds major national fire and wind code requirements, as well as most of the regional code requirements throughout the country. 15 or 20-year commercial warranties and 15-year residential warranties are included at no cost.
PART 1 GENERAL
1.1 SECTION INCLUDES
** NOTE TO SPECIFIER ** Delete items below not required for project.
A. Thermoplastic roofing membrane, mechanically fastened to substrate.
B. Thermoplastic roofing membrane, fully adhered to substrate.
C. Preparation of existing roof for recovering.
D. Roof insulation.
E. Prefabricated flashings, corners, parapets, stacks, vents, and related details.
F. Fasteners, adhesives, and other accessories required for a complete roofing installation.
G. Traffic Protection.
1.2 RELATED SECTIONS
** NOTE TO SPECIFIER ** Delete any sections below not relevant to this project; add others as required.
A. Section 05300 - Metal Deck: Installation and requirements.
B. Section 06100 - Rough Carpentry: Wood blocking and curbing.
C. Section 07595 - Preparation for Re-Roofing.
D. Section 07620 - Sheet Metal Flashing and Trim: Metal flashing and counter flashing installation and requirements.
E. Section 07710 - Manufactured Roof Specialties: Copings, counter flashing systems, gutters, downspouts, and roof expansion assemblies.
F. Section 07724 - Roof Hatches.
G. Section 07720 - Roof Accessories: Manufactured curbs and roof hatches.
H. Section 08620 - Unit Skylights.
I. Section 15146 - Plumbing Specialties: Roof drains and plumbing vents.
1.3 REFERENCES
** NOTE TO SPECIFIER ** Delete references from the list below that are not actually required by the text of the edited section.
A. ASTM C 578 - Standard Specification for Rigid, Cellular Polystyrene Thermal Insulation
B. ASTM C 1177/C1177M - Standard Specification for Glass Mat Gypsum Substrate for Use as Sheathing.
C. ASTM C 1289 - Standard Specification for Faced Rigid Cellular Polyisocyanurate Thermal Insulation Board.
D. ASTM C 1396/C1396M - Standard Specification for Gypsum Board.
E. ASTM D 146 - Standard Test Methods for Sampling and Testing Bitumen-Saturated Felts and Woven Fabrics for Roofing and Waterproofing.
F. ASTM D 570 - Standard Test Method for Water Absorption of Plastics.
G. ASTM D 751 - Standard Test Methods for Coated Fabrics.
H. ASTM D 828 - Standard Test Method for Tensile Properties of Paper and Paperboard Using Constant-Rate-of-Elongation Apparatus.
I. ASTM D1079 - Standard Terminology Relating to Roofing, Waterproofing, and Bituminous Materials.
J. ASTM D 1204 - Standard Test Method for Linear Dimensional Changes of Nonrigid Thermoplastic Sheeting or Film at Elevated Temperature.
K. ASTM D 2136 - Standard Test Method for Coated FabricsLow-Temperature Bend Test.
L. ASTM D3045 - Standard Practice for Heat Aging of Plastics Without Load.
M. ASTM D 4434 - Standard Specification for Poly(Vinyl Chloride) Sheet Roofing.
N. ASTM D 5602 - Standard Test Method for Static Puncture Resistance of Roofing Membrane Specimens.
O. ASTM D 5635 - Standard Test Method for Dynamic Puncture Resistance of Roofing Membrane Specimens.
P. ASTM E 108 - Standard Test Methods for Fire Tests of Roof Coverings.
Q. ASTM E 119 - Standard Test Methods for Fire Tests of Building Construction and Materials
R. ASTM G 154 - Standard Practice for Operating Fluorescent Light Apparatus for UV Exposure of Nonmetallic Materials.
S. UL - Roofing Materials and Systems Directory, Roofing Systems (TGFU.R10128).
T. Factory Mutual Global - Factory Mutual Standard 4470 - Approval Standard for Class 1 Roof Covers.
U. ASCE 7 - Minimum Design Loads For Buildings And Other Structures.
V. NRCA - The NRCA Roofing and Waterproofing Manual.
W. SPRI - Wind Load Design Guide for Fully Adhered and Mechanically Fastened Roofing Systems.
1.4 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.
** NOTE TO SPECIFIER ** Physical properties for 40 mil membrane. Delete if not being used.
C. Physical Properties
1. Roof product must meet the requirements of type IV PVC sheet roofing as defined by ASTM D 4434 and must meet or exceed the following physical properties.
2. Thickness: 40 mil (1.0 mm), nominal in accordance with ASTM D 751.
3. Breaking Strengths: greater than 430 lbf. (MD) and greater than 368 lbf. (XMD) in accordance with ASTM D 751, Grab Method.
4. Elongation at Break: greater than 30 percent in accordance with ASTM D 751, Grab Method.
5. Heat Aging in accordance with ASTM D 3045: 176 degrees F for 56 days. No sign of cracking, chipping or crazing. (In accordance with ASTM D 4434).
6. Factory Seam Strength: greater than 468 lbf in accordance with ASTM D 751, Grab Method.
7. Tearing Strength: greater than 91 lbf. (MD) and greater than 128 lbf. (XMD) in accordance with ASTM D 751, Procedure B.
8. Low Temperature Bend (Flexibility): Pass at minus 40 degrees F in accordance with ASTM D 2136.
9. Accelerated Weathering: No cracking, checking, crazing, erosion or chalking after 5,000 hours in accordance with ASTM G 154.
10. Linear Dimensional Change: less than 0.5 percent in accordance with ASTM D 1204 at 176 plus or minus 2 degrees F for 6 hours.
11. Water Absorption: less than 3 percent in accordance with ASTM D 570 at 158 degrees F for 166 hours.
12. Static Puncture Resistance: greater than 56 lbs. in accordance with ASTM D 5602.
13. Dynamic Puncture Resistance: greater than 474 pdl-ft in accordance with ASTM D 5635.
** NOTE TO SPECIFIER ** Physical properties for 50 mil membrane. Delete if not being used.
D. Physical Properties
1. Roof product must meet the requirements of type III PVC sheet roofing as defined by ASTM D 4434 and must meet or exceed the following physical properties.
2. Thickness: 50 mil (1.25 mm), nominal in accordance with ASTM D 751.
3. Breaking Strengths: greater than 472 lbf. (MD) and greater than 366 lbf. (XMD) in accordance with ASTM D 751, Grab Method.
4. Elongation at Break: greater than 31 percent in accordance with ASTM D 751, Grab Method.
5. Heat Aging in accordance with ASTM D 3045: 176 degrees F for 56 days. No sign of cracking, chipping or crazing. (In accordance with ASTM D 4434).
6. Factory Seam Strength: greater than 575 lbf in accordance with ASTM D 751, Grab Method.
7. Tearing Strength: greater than 68 lbf. (MD) and greater than 92 lbf. (XMD) in accordance with ASTM D 751, Procedure B.
8. Low Temperature Bend (Flexibility): Pass at minus 40 degrees F in accordance with ASTM D 2136.
9. Accelerated Weathering: No cracking, checking, crazing, erosion or chalking after 5,000 hours in accordance with ASTM G 154.
10. Linear Dimensional Change: less than 0.5 percent in accordance with ASTM D 1204 at 176 plus or minus 2 degrees F for 6 hours.
11. Water Absorption: less than 3 percent in accordance with ASTM D 570 at 158 degrees F for 166 hours.
12. Static Puncture Resistance: greater than 56 lbs. in accordance with ASTM D 5602.
13. Dynamic Puncture Resistance: greater than 474 pdl-ft in accordance with ASTM D 5635.
** NOTE TO SPECIFIER ** Physical properties for 60 mil membrane. Delete if not being used.
E. Physical Properties
1. Roof product must meet the requirements of type III PVC sheet roofing as defined by ASTM D 4434 and must meet or exceed the following physical properties.
2. Thickness: 60 mil (1.52 mm), nominal in accordance with ASTM D 751.
3. Breaking Strengths: greater than 438 lbf. (MD) and greater than 390 lbf. (XMD) in accordance with ASTM D 751, Grab Method.
4. Elongation at Break: greater than 31 percent in accordance with ASTM D 751, Grab Method.
5. Heat Aging in accordance with ASTM D 3045: 176 degrees F for 56 days. No sign of cracking, chipping or crazing. (In accordance with ASTM D 4434).
6. Factory Seam Strength: greater than 431 lbf in accordance with ASTM D 751, Grab Method.
7. Tearing Strength: greater than 132 lbf. (MD) and greater than 163 lbf. (XMD) in accordance with ASTM D 751, Procedure B.
8. Low Temperature Bend (Flexibility): Pass at minus 40 degrees F in accordance with ASTM D 2136.
9. Accelerated Weathering: No cracking, checking, crazing, erosion or chalking after 5,000 hours in accordance with ASTM G 154.
10. Linear Dimensional Change: less than 0.5 percent in accordance with ASTM D 1204 at 176 plus or minus 2 degrees F for 6 hours.
11. Water Absorption: less than 3 percent in accordance with ASTM D 570 at 158 degrees F for 166 hours.
12. Static Puncture Resistance: greater than 56 lbs. in accordance with ASTM D 5602.
13. Dynamic Puncture Resistance: greater than 14.7 ft-lbf in accordance with ASTM D 5635.
** NOTE TO SPECIFIER ** Physical properties for 50 mil and 60 mil fleeceback membrane. Delete if not being used.
F. Physical Properties: Meets the requirements of type III PVC sheet roofing as defined by ASTM D 4434 and must meet or exceed the following physical properties.
1. Thickness:
a. 50 mil (1.25 mm) 80 mil (2.0 mm) overall, nominal in accordance with ASTM D 751.
b. 60 mil (1.52 mm) 90 mil (2.25 mm) overall, nominal in accordance with ASTM D 751.
2. Breaking Strengths: greater than 200 lbf/in in accordance with ASTM D 751, Grab Method.
3. Elongation at Break: greater than 15 percent in accordance with ASTM D 751, Grab Method.
4. Seam Strength: Minimum 293 lbf. (75 percent of Breaking Strength) in accordance with ASTM D 751, Grab Method.
5. Tearing Strength: greater than 45 lbf in accordance with ASTM D 751, Procedure B.
6. Low Temperature Bend (Flexibility): Pass at minus 40 degrees F in accordance with ASTM D 2136.
7. Heat Aging in accordance with ASTM D 3045: 176 degrees F for 56 days. No sign of cracking, chipping or crazing.
8. Accelerated Aging: No cracking, checking, crazing, erosion or chalking after 5,000 hours in accordance with ASTM G 154.
9. Linear Dimensional Change: less than 0.5 percent in accordance with ASTM D 1204 at 176 plus or minus 2 degrees F for 6 hours.
10. Water Absorption: less than 3 percent in accordance with ASTM D 570 at 158 degrees F for 166 hours.
11. Static Puncture Resistance: greater than 33 lbf in accordance with ASTM D 5602.
12. Dynamic Puncture Resistance: greater than 474 pdl-ft in accordance with ASTM D 5635.
1.5 SUBMITTALS
A. Submit under provisions of Section 01300.
B. Product Data: Manufacturer's data sheets on each product to be used, including:
1. Preparation instructions and recommendations.
2. Storage and handling requirements and recommendations.
3. Installation methods.
4. Maintenance requirements.
C. Shop Drawings: Indicate insulation pattern, overall membrane layout, field seam locations, joint or termination detail conditions, and location of fasteners.
D. Verification Samples: For each finish product specified, two samples, representing actual product, color, and finish.
1. 4 inch by 6 inch (102 by 150 mm) sample of roofing membrane, of color specified.
2. Sample of roofing membrane with factory weld and T-shaped lap.
3. 4 inch by 6 inch (102 mm by 150 mm) sample of walkway pad.
4. Termination bar, fascia bar with cover, drip edge and gravel stop if to be used.
5. Each fastener type to be used for installing membrane, insulation/recover board, termination bar and edge details.
E. Manufacturer's Certificates: Certify products meet or exceed specified requirements.
F. Installer Certification: Certification from the roofing system manufacturer that Installer is approved, authorized, or licensed by manufacturer to install roofing system.
G. Manufacturers warranties.
1.6 QUALITY ASSURANCE
A. Perform work in accordance with NRCA ML104 and manufacturer's installation instructions.
B. Manufacturer Qualifications: A manufacturer specializing in the production of PVC membranes systems and utilizing a Quality Control Manual during the production of the membrane roofing system that has been approved by and is inspected by Underwriters Laboratories.
C. Installer Qualifications: Company specializing in installation of roofing systems similar to those specified in this project and approved by the roofing system manufacturer.
1.7 REGULATORY REQUIREMENTS
** NOTE TO SPECIFIER ** Use the following paragraphs carefully; edit specification to identify system performance requirements or functional criteria. Delete references from the list below that are not actually required by the text of the edited section.
A. Conform to applicable code for roof assembly wind uplift and fire hazard requirements.
** NOTE TO SPECIFIER ** Apply fire exposure rating required by the applicable building code and the Owner's insurance underwriter. Fire exposure ratings may also significantly affect insurance premiums. Apply only to specific installations over approved substrates. Consult with manufacturer to verify that the desired classification is available for system components as specified; delete all but one classification.
B. Fire Exposure: Provide membrane roofing materials with the following fire-test-response characteristics. Materials shall be identified with appropriate markings of applicable testing and inspecting agency.
1. Exterior Fire-Test Exposure:
a. Class A; ASTM E 108, for application and roof slopes indicated.
b. Class B; ASTM E 108, for application and roof slopes indicated.
c. Class C; ASTM E 108, for application and roof slopes indicated.
2. Fire-Resistance Ratings: Comply with ASTM E 119 for fire-resistance-rated roof assemblies of which roofing system is a part.
3. Conform to applicable code for roof assembly fire hazard requirements.
** NOTE TO SPECIFIER ** Apply wind uplift rating required by the applicable building code and/or the Owner's insurance underwriter. Wind uplift ratings may significantly affect insurance premiums and apply only to specific installations over approved substrates. Consult with manufacturer to verify that desired rating is available for system components as specified; delete all but one rating.