MIL-HDBK-1001/SA
Saddle. See Cricket.
Saturated felt. Felt that has been immersed in hot saturant bitumen.
Scupper. Channel through parapet designed for peripheral drainage of the roof, usually as safety overflow to limit accumulation of ponded rainwater caused by clogged drains.
Scuttle. Curbed opening, with hinged or loose cover, providing access to roof (synonymous with hatch).
Self-healing. Property of the least viscous roofing bitumens, notably coal-tar pitch, that enables them to seal cracks formed at lower temperatures.
Selvage joint. Lapped joint detail for two-ply, shingled roll- roofing membrane, with mineral surfacing omitted over a transverse dimension of the cap sheets to improve mopping adhesion. For a 36-inch-wide sheet, the selvage (unsurfaced) width is 19 inches.
Shakes. A wood roofing product that is split from a log and shaped by the manufacturer for commercial use. The three basic types of wood shakes are:
- handsplit and resawn shakes
- taper split shakes
- straight split shakes
Shark fin. Curled felt projecting up through the aggregate surfacing of a built-up membrane.
Shingles. Asphalt saturated roofing felt coated on both sides with asphalt, alone or stabilized with a finely powdered mineral material, the top coating usually being significantly thicker
than the back coating and covered with roofing granules impressed in its surface. Most commonly used 12 inch x 36 inch, 3 tab
self-sealing strip shingle.
Shingling. The pattern formed by laying parallel felt rolls with lapped joints so that one longitudinal edge overlaps the longitudinal edge of one adjacent felt, whereas the other longitudinal underlaps the other adjacent felt. (See Ply.) Shingling is the normal method of applying felts in a built-up roofing membrane.
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