(1) crushed stone, crushed slag or water-worn gravel used for surfacing a built-up roof system; (2) any granular material.
Tag: aggregate
Cap Sheet
A sheet, often granule-surfaced, used as the top ply of some built-up or modified bitumen roof membranes and/or flashings
Fine Mineral Surfacing
Water-insoluble, inorganic material, more than 50 percent of which passes through a No. 35 sieve. Used on the surface of various roofing materials and membranes to prevent sticking.
Flood Coat (Pour Coat)
The surfacing layer of bitumen into which surfacing aggregate is embedded on an aggregatesurfaced built-up roof.
Granule
(also referred to as mineral or ceramic granule) opaque, natural or synthetically colored aggregate commonly used to surface cap sheets, shingles, and other granule-surfaced roof coverings.
Gravel
Coarse granular aggregate resulting from the natural erosion of rock.
Mineral Granules
see Granules.
Vermiculite
An aggregate used in lightweight insulating concrete, formed by heating and expanding of a micaceous material.