Construction

369 entries in this trade.

ridge course

The last or top course of roofing materials, such as tile, roll roofing, shingles, etc. that covers the ridge and overlaps the intersecting field roofing.

ridge tile

A curved or bent tile specifically designed to cover the apex or ridge of a pitched roof, where two roof planes converge.

ridge vent

A vent located at the ridge of the roof that allows the escape of warm and/or moist air from the attic area or rafter cavity; it is usually a simple shielded gap but may be a ventilator (device).

roof curb

A raised frame used to mount mechanical units (such as air conditioning or exhaust fans), skylights, etc. on a roof.

sand jack

A type of jack from which sand can be released gradually in small quantities when lowering something into position.

sandwich shell

A structure consisting of a core (which can be foam or solid, honeycomb, web, corrugated or truss) sandwiched between two thinner outer layers, often made of metal or composite.

sandwich theory

A theory describing the behaviour of a beam, plate, or shell consisting of three layers: two facesheets and one core.

scaff tag

A label affixed to scaffolding to certify that it has been erected correctly and is safe to use.

screeding

The process of producing a smooth flat layer of concrete or similar material.

screen wall

a nonstructural wall erected around units or curbs on a roof. Typically the framing consists of girts with a wood or metal covering attached to the frame.

scuttle

A hatch that provides access to the roof from the interior of a building.

sealant

A mixture of polymers, fillers, and pigments used to fill and seal joints where moderate movement is expected.

seam

A joint formed by mating two separate sections of materials.

set

A piece placed temporarily upon the head of a pile when the latter cannot otherwise be reached by the weight, or hammer.

sheet rock

Prehardened plaster of Paris (gypsum) sold in large panels and used as a wall surface in building construction.

shift

The extent, or arrangement, of the overlapping of plank, brick, stones, etc., that are placed in courses so as to break joints.

shutter

A panel used to contain freshly poured concrete, which is usually removed when the concrete hardens.

sideform

A process for setting concrete which uses forms to confine the concrete to the desired width.

sill

A threshold; horizontal structural member of a building near ground level on a foundation or pilings, or lying on the ground, and bearing the upright portion of a frame; a sill plate.

single-ply membrane

Roofing membranes that are field applied using just one layer of membrane material (either homogeneous or composite rather than multiple layers.

single-ply roof

A roof system in which the principal roof covering is a single layer of flexible membrane often thermoset or thermoplastic.

sister

To strengthen (a supporting beam) by fastening a second beam alongside it.

snow guard

A device or series of devices attached to the roof in a pattern that attempts to hold the snow in place, thus preventing sudden snow or ice slides from the roof

snow load

The live load due to the weight of snow on a structure, such as a roof; included in the design calculations.

sonotube

A tube of compressed fibre into which wet concrete is poured in order to make columns or pillars

span

The length of a cable, wire, rope, chain between two consecutive supports.

spandrel

soffit (usually used to describe metal or corrugated plastic types of roof soffit)

split slab

A method of construction using two separate concrete slabs: the first placed as a slab on grade or suspended slab and covered with waterproofing and a drainage system; the second, or topping slab, placed over the underlying slab and waterproofing.

square

A unit used in measuring roof area equivalent to 100 square feet (9.29 m²) of roof area. The materials for roofing jobs are often billed by the square in the United States.