1200 INDUSTRY ST 2025-03-24 - Laserfiche WebLink

3. Protrusions such as steel welding plates and wall expansion joints shall be treated with an extra layer of membrane and picture framed with a termination bar. 4. The surface shall be compatible with manufacturer's contact adhesive. If necessary, install 1/4" plywood backer to divorce the contaminated substrate from the new flashing materials. 5. When using flashing on a vertical surface, the flashing shall be secured before the seam between the flashing and the main roof sheet is completed. 6. The flashing membrane shall extend the prescribed distance onto the main roof sheet beyond the mechanical securement. 7. Care shall be taken to ensure that the flashing does not bridge where there is a change of direction (e.g., Where the parapet meets the roof deck). 8. The top of the installed flashings shall be fastened under metal counterflashing, coping cap, or unit flashing. 9. On high walls where coping or wall siding is not provided, contractor shall terminate the membrane using water-block mastic between the membrane and the substrate and secure the top edge with an aluminum termination bar. Excess water-block mastic shall be removed, and excess membrane trimmed just below the lip of the termination bar. Contractor shall then install a continuous bead of caulking along the top edge of the termination bar. The maximum distance between fasteners shall be 12" on center. 10. Over the exposed top edge of the base flashing termination bar, contractor shall install a two-piece reglet and counterflashing system. The reglet shall have slotted holes spaced a minimum of 16" o.c. to allow for thermal expansion and contraction. The top edge of the reglet shall also be sealed with a continuous bead of caulking, sloped to drain. Provide closures at all inside and outside corners. C. Penetrations: 1. All penetrations (pipes, supports, soil stacks, cold vents, hot vent stacks, conduit, etc.) Passing through the roofing membrane shall be flashed in accordance with the manufacturer's approved details. 2. Existing flashings shall be removed where required. 3. When bonding or sealing directly to metal surfaces, contractor shall consult with the manufacturer regarding their requirements for metal primer. 4. Pre-molded or prefabricated [flashings shall be used whenever possible. 5. Only with advance approval, sealer pans may be used to flash pipe clusters or unusual shapes. The pans shall be filled with 2 component pourable sealer in accordance with the manufacturer's requirements and detail drawings. 6. Sealer pans shall not be used where a pre-molded, prefabricated, liquid applied, or field fabricated flashings can be used. 7. Install sheet metal bonnets or hoods around roof penetrations to cover contents of sealer pans. Field fabricate hoods to fit around pipes, angle irons, I-beams, etc., penetrating roofing system. Weld, or pop-rivet metal closure to sides of angle iron and I-beam penetrations. Apply butyl sealing tape between surface of penetration and sheet metal hood prior to attachment. Use screws or stainless steel clamping rings to hold in place the hoods around circular or square penetrations. D. Fascia: 1. The fascia system shall be fabricated from membrane-coated metal or other acceptable metal and shall be fastened to the wood nailer with low profile fasteners approved by the manufacturer(min #10 wire), spaced a maximum of 4" on center, as shown in the drawings and as required by the manufacturer. 2. Joints in the fascia shall be sealed as required by the manufacturer. Provide aluminum tape as a bond breaker at each butt joint. E. Scuppers: 1. Fabricate from membrane coated metal. Fabricate in one piece to the greatest extent possible. Set welded watertight scupper over the membrane in sealant and secure to the SEA00511 / Prologis - SEA00511 07 5400 - 11 THERMOPLASTIC MEMBRANE - FY24- Everett 1 - Capital ROOF SYSTEM Roofing Project