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THERMOPLASTIC MEMBRANE ROOFING - ADHERED Section 07541 15-1207 1. Roof drains and scuppers have been reconditioned or replaced and installed properly. 2. Roof curbs, nailers, equipment supports, vents and other roof penetrations are properly secured and prepared to receive new roofing materials. 3. All surfaces are smooth and free of dirt, debris and incompatible materials. 4. All roof surfaces shall be free of water, ice and snow. 3.03 SUBSTRATE PREPARATION The roof deck and existing roof construction must be structurally sound to provide support for the new roof system. The Applicator shall load materials on the rooftop in such a manner as to eliminate risk of deck overload due to concentrated weight. The Owner's Representative shall ensure that the roof deck is secured to the structural framing according to local building code and in such a manner as to resist all anticipated wind loads in that location. A. New Construction 1. Steel Deck: a) FM approved steel deck - The roof deck shall be 22 gauge (minimum) conforming to meet the latest revision of FM's Loss Prevention Data Sheet 1-29 and the local code's current requirements. b) Non -FM approved steel deck - The roof deck shall be 24 gauge (minimum) grade D and shall conform and be installed to the local code's current requirements. 2. Wood Deck: a) The roof deck shall be minimum 1-1/2 inch thick lumber or 15/32 inch thick plywood. Deck shall be installed according to local code requirements. Contact Sika Sarnafil Technical for fastening patterns and methods. 3. Insulating Fill Substrate: The lightweight fill shall be installed by a trained lightweight fill Applicator in accordance with the lightweight fill manufacturer's requirements and industry practice. The surface shall be free from dust and loose fragments, be smooth, level, and free from moisture. Sharp ridges or other projections above the surface shall be removed before roofing. Proper venting as recommended by the roof deck manufacturer shall be provided. An insulation recover board may be required as a substrate to adhere to. Fastening for recover board shall be into structural deck below insulating fill (see steel/concrete deck requirements). B. Reroofing with Removal of Existing Bitumen Roofing General Criteria All existing roofing, base flashing, deteriorated wood blocking or deteriorated metal flashings shall be removed. Remove only that amount of roofing and flashing which can be made weathertight with new materials during a one -day period or before the onset of inclement weather. 16