options for classifications increase in increments of 15, e.g., Class 1A135, 1A-150, 1A-165, and higher. "Class 1A" signifies meeting ASTM E108, Class A fire performance for approved Class 1 roof coverings. For having three or more hailstorms annually, FM recommends roofing systems rated SH (severe hail) instead of MH (moderate hail). a. Fire/Windstorm Classification: Class 1A-//60// //75// //90// //105// //120//. b. Hail Resistance: //MH// //SH//. SPEC WRITER NOTE: Consider retaining requirement below in addition to FM Approval Listing requirement above for high windstorm classification areas (1A105 or greater) to allow for broader participation in bidding. 6. High Wind Zone Design Requirement: Contractor Option: In lieu of FM Approval Listing windstorm classification, provide roofing membrane, base flashing, and component materials that comply with County requirements. 1.4 QUALITY ASSURANCE: A. Installer Qualifications: 1. A firm with a minimum of three (3) years’ experience in type of work required by this section. 2. A firm licensed or in writing by manufacturer to perform work under warranty requirements of this Section. 3. Employ full-time supervisors who have worked on roofing projects of similar types and scopes for a minimum of three (3) years. B. Inspector Qualifications: Inspection of work by inspector or manufacturer technical representative experienced in the installation and maintenance of the specified roofing system who is, qualified to perform roofing observation and inspection specified in Field Quality Control Article. Inspector is to determine Installer’s compliance with the requirements of this Project, and be approved by the manufacturer to issue warranty certification. The Roofing Inspector to be one of the following: 1. An authorized full-time technical employee of the manufacturer, not engaged in the sale of products.
options for classifications increase in increments of 15, e.g., Class 1A135, 1A-150, 1A-165, and higher. "Class 1A" signifies meeting ASTM E108, Class A fire performance for Class 1 roof coverings. For having three or more hailstorms annually, FM recommends roofing systems rated SH (severe hail) instead of MH (moderate hail). a. Fire/Windstorm Classification: Class 1A-//60// //75// //90// //105// //120//. b. Hail Resistance: //MH// //SH//. SPEC WRITER NOTE: Consider retaining requirement below in addition to FM Approval Listing requirement above for high windstorm classification areas (1A105 or greater) to allow for broader participation in bidding. 6. High Wind Zone Design Requirement: Contractor Option: In lieu of FM Approval Listing windstorm classification, provide roofing membrane, base flashing, and component materials that comply with County requirements. 1.4 QUALITY ASSURANCE: A. Installer Qualifications: 1. A firm with a minimum of three (3) years’ experience in type of work required by this section. 2. A firm licensed or approved in writing by manufacturer to perform work under warranty requirements of this Section. 3. Employ full-time supervisors who have worked on roofing projects of similar types and scopes for a minimum of three (3) years. B. Inspector Qualifications: Inspection of work by inspector or manufacturer technical representative experienced in the installation and maintenance of the specified roofing system who is, qualified to perform roofing observation and inspection specified in Field Quality Control Article. Inspector is to determine Installer’s compliance with the requirements of this Project, and be approved by the manufacturer to issue warranty certification. The Roofing Inspector to be one of the following: 1. An authorized full-time technical employee of the manufacturer, not engaged in the sale of products.
VA075416.docx