Trail:

Glossary

Sill
Horizontal member at the bottom of a window or door frame; sometimes spelt cill. Also the horizontal member at the base of a timber-framed wall, into which the posts and studs are tenoned.
Single-framed
Of a roof: without purlins or other longitudinal members above the springing of the rafters. Compare double-framed.
Skew
(Scots): Sloping or shaped stones finishing a gable upstanding from the roof. A skewputt is a bracket at the bottom end of a skew.
Skew arch
An arch spanning responds not diametrically opposed; hence also skew bridge.
Slab block
A multi-storey block with flats approached from corridors or galleries from service cores at intervals or towers at the ends (plan also used for offices, hotels etc.)
Slate-hanging
Covering of overlapping slates on a wall, which is then said to be slate-hung. Tile-hanging is similar.
Slop stone
(Irish): Drainage stone designed to carry kitchen waste through the thickness of a wall.
Slype
In a greater medieval church, a covered way or passage leading east from the cloisters between transept and chapter house.
Snecked
Of masonry, with courses broken by smaller stones (snecks).
Soffit
(lit. ceiling): Underside of an arch (also called an intrados), lintel, etc. Soffit roll: medieval roll moulding on a soffit.