07_WVA_01-1-Metal_Roofing.docx

SECTION 07 WVA 01-1

Metal Roofing

1. GENERAL

0. REFERENCES

The publications referenced within this specification are referred to by the basic designation only.

0. ASTM International (ASTM)

0. C1289 Standard Specification for Faced Rigid Cellular Polyisocyanurate Thermal Insulation Board

0. E1514/E1617 Standard Specification for Structural Standing Seam Roof Panel Systems

0. E1592 Structural Test Method for Structural Performance of Sheet Metal Roof and Siding Systems by Uniform Static Air Pressure Difference

0. E1646 Standard Test Method for Water Penetration of Exterior Metal Roof Panel Systems by Uniform Static Air Pressure Difference

0. E1680 Standard Test Method for Rate of Air Leakage Through Exterior Metal Roof Panel Systems

0. National Roofing Contractors Association (NRCA)

1. The NRCA Roofing Manual: Metal Panel and SPF Roof Systems (2012)

1. The NRCA Roofing Manual: Architectural Metal Flashing, Condensation Control, and Reroofing (2014)

0. Unified Facilities Guide Specification (UFGS)

2. UFGS 07 21 13- Board and Block Insulation

2. UFGS 07 41 13- Metal Roof Panels

2. UFGS 07 60 00- Flashing and Sheet Metal

0. SUBMITTALS

1. Government approval is required for submittals with a "G" designation; submittals not having a "G" designation are for information only. Submit the following in accordance with the Statement of Work, SUBMITTALS:

0. Shop Drawings

0. Drawing should show elevations, joint and connection details, as well as panel details. Drawing shall include details of the flashing and roof penetrations. [G]

0. Product Data

1. Include product and installation information for all products used. [G]

0. Certifications

2. Proof of current Manufacturer Certified Installer Status. [G]

0. Manufacturer’s Instructions

3. MSDS for all materials used in construction.

0. Closeout Submittals

4. Twenty (20) year warranty for material and workmanship. [G]

0. QUALITY ASSURANCE

2. Delivery and Storage

0. Delivery times and location shall be coordinated with the Contracting Officer or an appointed representative.

0. Material must be stored in a dry location and elevated from the ground. All material shall not be allowed to accumulate water at any point before or during installation. The roof shall not be used as a staging area for materials.

2. Contractor shall follow all manufacturing material handling instructions.

1. PRODUCTS

1. Roof System

0. Metal Roofing –

0. Aluminum alloy conforming to ASTM B – 209, tempered as required for the forming operation, minimum 0.032 inch thick (22 gage)

0. Roofing must meet or exceed all requirements of ASTM E1514.

0. Panels shall have a thermoset silicone-modified polyester (SMP) factory coating system applied. Color to be selected from standard offering of manufacturer.

0. Alternative coating system may be submitted for consideration and possible acceptance.

0. Metal Roofing Fasteners-

0. Corrosion resistant, proven acceptability for anchoring configuration that is to be used by both manufacturer of roofing system and fastener.

0. Metal Flashing-

0. Shall be aluminum have a minimum gage thickness of 0.032” (22 gage)

1. Roof Drains (If Applicable)-

1. Roof Scupper Drains: Galvanized Cast Iron, having a four (4) inch threaded pipe outlet, similar to unit supplied by: JR Smith model #1510

1. Scupper Pipe: Galvanized cast iron, threaded as required to connect scupper to adaptor

1. Downspout Adaptor: Galvanized Cast Iron, having a four (4) inch inlet, similar to unit supplied by: JR Smith, model #1550

1. Downspout: galvanized steel, 28 gage, sized to fit adaptor above

1. EXECUTION

2. GENERAL

0. Environmental Conditions

0. The roof shall be left in water-tight condition at the end of each work day and prior to inclement weather. This includes the sealing of edges and flashing.

0. Roofing shall only be done when the temperature is in the manufacturer specified range and there is no rain in the forecast. Roofing material shall not be installed on a wet substrate.

0. Contractor shall be held liable for damages caused by roofing activities.

0. Contractor shall be responsible for cleanup of any debris that is carried from the roof to the surrounding areas.

0. Safety

1. Contractor shall follow all applicable safety rules regarding work on roofs and the use of lifts and cranes. This is to include OSHA and the WVA safety rules.

1. All work practices shall conform to the standards set in the NRCA Roofing Manual.

0. Final Requirements

2. The final roof assembly shall meet or exceed all requirements for a FM Class 1-90 roof as well as the manufacturer’s requirements for a 20-year material and workmanship warranty.

2. Metal Roofing

1. The contractor shall install new treated wood blocking and “grid nailers” as required to the existing roof.

1. New standing seam metal roof shall be fastened to the grid nailers. The contractor shall follow the manufacturer guidelines for fastening requirements.

1. New metal trim shall be installed at the soffit cover panel ends.

1. The color of the roof must not vary in shade.

2. Flashing

2. Contractor shall install aluminum flashing around all edges of the roof. Flashing shall provide a waterproof seal at all edges and roof penetrations.

2. Contractor shall provide all wood nailers and blocking necessary for installation.

2. Flashing shall be installed according to the manufacturer’s recommendations and the NRCA Roofing Manual.

2. Finished sheet metal work will form a weather tight construction without waves, warps, buckles, fastening stresses or distortion, which allows for expansion and contraction.

0. ACCEPTANCE CHECKS AND TESTS

0. Contractor shall conduct an inspection with a manufacturer’s representative to validate a twenty (20) year material and workmanship warranty. Contractor shall submit this warranty to the government after the inspection has been conducted.

0. The roof will not be considered 100 percent complete by the government until all material has been cleaned and removed from the site. The roof shall be handed over to the government as a clean and finished product.

0. Final Acceptance: The contractor shall conduct a final walkthrough with the government for inspection of finished work. Final approval will not be granted until the warranty is obtained by the contracting officer.

- -END OF SECTION - -