Fabric
A woven cloth or material of organic or inorganic filaments, threads, or yarns used for reinforcement in certain membranes, flashings, and roof systems. |
Fascia
On a sloped roof, the fasica board is nailed to the end of the rafters, sometimes supporting a gutter, on low sloped roofs it is typically a border around the perimeter. |
Felt
A flexible sheet of interlocking fibers with a binder, or through moisture or heat process. Typically manufactured from wood pulp and vegetable fibers (organic) glass fibers, or polyester fibers. Used as an underlayment in some roof systems (shingle systems for example) |
Field Seam
A splice or seam made in the field, where overlapping sheets are joined together using sealing / joining method particular to the roof system. |
Fishmouth
A half cylindrical shaped opening or void in a lapped edge or seam. Typically caused by wrinkling or shifting of ply sheets during installation. Shingle fishmouths occur at the cut edge. |
Flashing
components used to weatherproof or seal roof system edges at perimeters, penetrations, walls, expansion joints, drains and other areas where the roofing material is interrupted or ends. |
Fleece
Mats or felts composed of fibers, sometimes used as a membrane backer for fully adhered installations. |
Flood Coat
Surfacing layer of bitumen (asphalt) on a built up roof installation. |
Gable
The vertical triangular portion of the end of a building with a double sloped roof |
Galvanize
To coat steel or iron with zinc for corrosion resistance
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Guage
A metal thickness measurement.
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Granule
Opaque, natural or synthetically colored aggregate commonly used to surface roofing materials, shingles cap sheets, etc. |
Gravel Stop
A flanged device typically metal, designed to prevent loose gravel (aggregate) from washing off the roof. Also serves as a continuous finished edge. |
Gussett
Typically used at the bottom of a valley, a flat metal piece, wider thant the valley to help prevent debris build up at the base of the valley. |
Hand Tabbing
Spot applying adhesive (asphalt based) to underside of shingles for extra securement and wind resistance. |
Heat Seaming
AKA heat welding, the process of joining thermo plastic membranes by heating and then applying pressure to join materials together. |
Hip
The inclined external angle formed by the intersection of two sloping roof planes. |
HVAC
Heating, Ventilating and air conditioning equipment. |
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