Standard Specification for Roofing Slate
|Publication Date:||25 August 1989|
|ICS Code (Mineral materials and products):||91.100.15|
1.1 This specification covers the material characteristics, physical requirements, and sampling appropriate to the selection of slate for use as roof shingles.
1.2 Slates not included in this specification are those containing soft carbonaceous ribbons. The wide variation in physical properties and composition of such ribbon slates render their service life uncertain under some conditions of use.