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New Specification for Non-Asbestos Roofing

Old man winter will have a tougher time invading residential homes when roofing manufacturers follow a new ASTM International standard.

New in July, C 1530, Standard Specification for Non-Asbestos Fiber-Cement Roofing Shakes, Shingles, and Slates with Designed Varying Profiles and Thicknesses, describes requirements for manufacture, composition, production, quality control, and inspection. It offers tests for:

• Dimension and tolerance;
• Breaking load;
• Water absorption;
• Accelerated-weathering; and
• Frost-resistance.

Members of ASTM Subcommittee C17.02 on Non-Asbestos Fiber Cement Products developed the specification under the guidelines of ASTM Committee C17 on Fiber Reinforced Cement. “Strong contribution for this standard was received from roofing manufacturers, roofing installers, roofing consultants, testing laboratories, raw material suppliers, and other interested individuals,” says the standard’s chief author, Alex N. Korneff, a chemical engineer and technical manager with PTX Industries, Inc., Irwindale, Calif.

C 1530 applies to “varying profile” fiber-cement roofing products with an inorganic binder reinforced by discrete non-asbestos fibers. “It will help lift the quality expectations of products in this industry,” Korneff avers.

Committee members created the new standard for varying profiles as a companion to C 1225 for flat products (Specification for Non-Asbestos Fiber-Cement Roofing Shingles, Shakes, and Slates). Stakeholders in the residential re-roof market who reference these standards with ASTM C 1459, Specification for Performance of Non-Asbestos Fiber-Reinforced Cement Shake, Shingle, and Slate Roofing Systems, will access a yard stick for material quality and performance.

For further technical information, contact Alex Korneff, PTX Industries, Inc., Irwindale, Calif. (phone: 626/969-7544). Committee C17 meets Dec. 10-11 in Miami Beach, Fla. For membership or meeting details contact Jim Olshefsky, director, Committee Services, ASTM International (phone: 610/832-9714). //

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