Install a mechanically attached base sheet prior to installation of insulation or roofing membrane. Gypsum Gypsum shall be smooth and free from deflections or ridges. An average fastener withdrawal resistance as recommended by the fastener manufacturer be obtained; however, at no time shall it be less than 40 lbs. (178 N) per fastener. Wet or frozen poured gypsum decks are not suitable to receive a roof. Poured-in-place gypsum roof decks contain a large percentage of moisture. All necessary precautions shall be taken to avoid the entrapment of moisture under the roofing system. In addition to ventilation of the underside to allow for proper curing, topside and perimeter venting shall be implemented. Install a mechanically attached base sheet prior to installation of insulation or roofing membrane. Deck Preparation for Self-Adhered Roof System: Insulation shall be installed as specified in Section 05 30 00 - Metal Decking. Sweep or blow away any dust, dirt or sand particles that could interfere with adhesion to approved substrate. deck types: Re-Roofing Applications: Remove existing roof flashings from curbs and parapet walls down to the surface of the roof. Remove existing flashings at roof drains and roof penetrations. Remove all wet, deteriorated, blistered or delaminated roofing membrane or insulation and fill in any low occurring as a result of removal work to create a smooth, even surface for application of new roof membranes. Install new wood nailers as necessary to accommodate insulation/recovery board or new nailing patterns. When mechanically attached, the fastening pattern for the insulation/recovery board shall be as recommended by the specific product manufacturer. Re-roofing over coal tar pitch requires a mechanically attached recovery board or insulation and a base sheet prior to the application of roofing system. Existing roof surfaces shall be primed as necessary with asphalt primer meeting ASTM D 41 and allowed to dry prior to installing the roofing system. INSTALLATION - GENERAL Application of coal-tar elastomeric roofing shall be in strict accordance with the manufacturer's recommendations and current NRCA, Underwriters Laboratory and IBC guidelines, except where more stringent requirements are shown or specified. In the instance of a conflict between these specifications and those of the manufacturer and/or current NRCA, Underwriters Laboratory and IBC guidelines, the more stringent specifications shall take precedence. PROTECTION Protect installed products until completion of project. Touch-up, repair or replace damaged products before Substantial Completion.
Install a mechanically attached base sheet prior to installation of insulation or roofing membrane. Gypsum Gypsum shall be smooth and free from deflections or ridges. An average fastener withdrawal resistance as recommended by the fastener manufacturer be obtained; however, at no time shall it be less than 40 lbs. (178 N) per fastener. Wet or frozen poured gypsum decks are not suitable to receive a roof. Poured-in-place gypsum roof decks contain a large percentage of moisture. All necessary precautions shall be taken to avoid the entrapment of moisture under the roofing system. In addition to ventilation of the underside to allow for proper curing, topside and perimeter venting shall be implemented. Install a mechanically attached base sheet prior to installation of insulation or roofing membrane. Deck Preparation for Self-Adhered Roof System: Insulation shall be installed as specified in Section 05 30 00 - Metal Decking. Sweep or blow away any dust, dirt or sand particles that could interfere with adhesion to approved substrate. deck types: Re-Roofing Applications: Remove existing roof flashings from curbs and parapet walls down to the surface of the roof. Remove existing flashings at roof drains and roof penetrations. Remove all wet, deteriorated, blistered or delaminated roofing membrane or insulation and fill in any low occurring as a result of removal work to create a smooth, even surface for application of new roof membranes. Install new wood nailers as necessary to accommodate insulation/recovery board or new nailing patterns. When mechanically attached, the fastening pattern for the insulation/recovery board shall be as recommended by the specific product manufacturer. Re-roofing over coal tar pitch requires a mechanically attached recovery board or insulation and a base sheet prior to the application of roofing system. Existing roof surfaces shall be primed as necessary with asphalt primer meeting ASTM D 41 and allowed to dry prior to installing the roofing system. INSTALLATION - GENERAL Application of coal-tar elastomeric roofing shall be in strict accordance with the manufacturer's recommendations and current NRCA, Underwriters Laboratory and IBC guidelines, except where more stringent requirements are shown or specified. In the instance of a conflict between these specifications and those of the manufacturer and/or current NRCA, Underwriters Laboratory and IBC guidelines, the more stringent specifications shall take precedence. PROTECTION Protect installed products until completion of project. Touch-up, repair or replace damaged products before Substantial Completion.