User manual GAF TOPCOAT STANDARDS PART 1 FOR METAL SPECIFICATIONS REV 06-2001

[. . . ] TOPCOAT STANDARD SPECIFICATIONS FOR METAL PART 1 - GENERAL 1. 05 REGULATORY REQUIREMENTS 1. 01 RELATED SECTIONS / DOCUMENTS Topcoat Detail Drawings, site specific drawings and General Provisions of the contract, including General, Supplementary and Special Conditions found in Division7 Specification Sections, apply to the work addressed in this section. FM Listing: Provide Topcoat Roofing System and component materials which have been evaluated by Factory Mutual System for flame-spread and are listed in "Factory Mutual Approval Guide" for Class I construction over existing metal roofing (Flame spread must be in accordance with ASTM #E-108). Provide roof covering materials, bearing FM approval marking on package or container, which indicates that material has been subjected to FM's examination, test procedures, follow-up inspection services and approval. UL Listing: Provide Topcoat Roofing System and component materials which have been evaluated by Underwriters Laboratories for flame-spread, and are listed in "Underwriters Laboratory Roofing Materials and Systems Directory" for Class A construction over existing metal or other non-combustible roofing (Flame-spread must pass ASTM #E-108 with unlimited slope). [. . . ] Ponding water areas which cannot be eliminated shall be treated with FlexSeal LV prior to application of other Topcoat products. Repair of Dented / Damaged Panels: Installer shall repair dented and/or damaged metal roof panels. If ribs are broken, Installer shall cover the broken rib area with a sheet metal cap. Sheet metal rib caps must be "sealed" to the roof by applying Topcoat Flashing Grade over the entire broken rib area to be capped prior to attaching the cap with EverTiteTM fasteners. Then, Topcoat Flashing Grade shall be used to seal all the newly created rib cap seams and fasteners. Should roof panels be severely damaged, Installer shall remove and replace damaged areas prior to application of Topcoat products. A. Do not proceed with installation of the Topcoat Roofing System until unsatisfactory conditions have been corrected in a manner acceptable to the manufacturer (GAFMC Topcoat. ). Preparation of the Roof Substrate is the responsibility of the Installer. Installer shall address and correct all of the following: · · · · · · · · · · Treatment of excessive gaps Installation of sheet metal crickets Treatment of ponding water areas Repair of dented / damaged panels Re-tightening and replacement of fasteners Thorough cleaning / Removal of existing paints and coatings Treatment of residual asphalt Treatment of rust areas Priming of pre-finished metal panels Miscellaneous items C. Treatment of Excessive Gaps: All large or excessive gaps existing between roof panels must be closed or made flush with EverTiteTM self-drilling fasteners. Closed-celled foam strips or polyurethane foam may be used to pre-fill voids larger than 1/4 inch before applying Topcoat Flashing Grade. Foam shall be shaped with a utility knife or other method to create a cant strip which facilitates both Topcoat adhesion and water drainage, as well as, prevents shearing of Topester Fabric on metal edges. Installation of Sheet Metal Crickets: Sheet metal crickets must be installed according to manufacturer's specifications (minimum 26 gauge metal - heavier gauge required for larger crickets) on the high side of all curb units. Vertical ribs shall be cut a minimum of 2" from the cricket to allow both the cricket flanges to mount flush to the metal panel and facilitate water drainage. Cut vertical ribs shall then be treated in the same fashion as a void larger than a 1/4 inch. New crickets shall be "sealed" by placing a continuous bead of Topcoat FlexSeal under the flanges before they are mechanically attached to the curb unit and metal roof panel. Re-tightening and Replacement of Fasteners: All fasteners must be re-tightened, secured or replaced, as necessary. All stripped fasteners must be replaced with larger diameter fasteners, and the area resecured by adding a new fastener next to the one which was stripped. In evaluating a roofing substrate for the application of the Topcoat System, it is important to note the manner in which the roof is fastened. The fastening pattern may have to be modified / altered to facilitate the proper installation of the system. Thorough Cleaning / Removal of Existing Paints and Coatings: Metal substrate must be pressure-washed with water. A minimum working pressure of 3, 000 psi shall be used to remove all dirt, dust, previous paints / coatings which are delaminating and waste products (oil, oil-based roof cements, solvents, grease, animal fats, etc. ). [. . . ] Embed 6" width of Topester Fabric using additional Flashing Grade, as necessary. Both the top and bottom of neoprene pipe boots shall be flashed using Topcoat Flashing Grade and Topester Fabric as described above. Skylights: Curb skylights shall be treated in the same fashion as Curb Flashings. The entire perimeter of 12 3. 03 OTHER ITEMS Rev June 2001 TOPCS502 TOPCOAT STANDARD SPECIFICATIONS FOR METAL A. [. . . ]