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GlossaryAs the roofing industry has large variety of terms, we have put together some common roofing definitions to help you further understand our products and services. Alternatively, If you wish to view photos of Roofing Profiles please click here. A | B | C | D | E | F | G | H | I | J | K | L | M Apron flashing: A horizontal flashing installed where the top end of a roof slope meets a vertical projection, such as a chimney or parapet wall.
Astragal: See straps. Barge: A finishing at the gable end of a roof, fixed parallel to the roof slope.
BMT: Base metal thickness Box Gutter: A gutter not at an eave, typically at the base of two opposing roof slopes.
Capping: A cover at the top of a gap that weatherproofs, typically at the ridge of a pitched roof. Chimney Gutter: See Soaker CGI: See Corrugated Roofing CGI Mini: See Roofing Profiles Cladding: Sheeting that encloses a building-roofing and walling. Colours: View colour samples from the Colorbond® Living Brochure. Concealed-fastened: A method of fixing cladding by means of hidden, fixing clips or brackets (sometimes called secret fixing). Corodek®: See Corrugated Roofing Corrugated Roofing: See Roofing Profiles Custom Blue Orb®: See Corrugated Roofing Custom Orb®: See Corrugated Roofing Downpipe: A pipe to carry roof water from gutters and roof catchments to drains or storage tanks. Drop: See Pop. Eaves Gutter: A roof gutter attached at an eaves overhang. Elbow: A fitting used in a downpipe, to change direction of the downpipe by about 90 degrees. Electrolytic (galvanic) Corrosion: Corrosion resulting from the contact of two different metals when an electrolyte (like water) is present. Expansion Joint: A joint in a long run of cladding, gutter or flashing designed to allow for thermal expansion and contraction.
Fall (slope): The slope of the roof or gutter, often expressed in degrees, or as a ratio of vertical height to horizontal distance (e.g. 1 in 20). Fascia (fascia board): A board, or rolled metal product of similar dimensions, fixed along the eaves, to which a gutter is secured. Fixings Screws: nails or clouts used to fasten cladding to a building structure. Flashing: A material, usually metal, used to waterproof the junction between two intersecting roof and/or wall surfaces. At a masonry wall, it is often built into the mortar. Galvanized Steel: Steel sheeting protected against corrosion by a zinc coating applied by the continuous hot-dip process. Girth: The width of the blank strip from which a profile is rolled (usually refers to gutters and flashings). Gutter: A channel that collects roof water and carries it to an outlet. Klip-Lok 700®: See Topdeck® 700 Mansard: A roof built at two pitches, the steeper pitch commencing at the eaves and the flatter pitch finishing at the ridge. Maxirib: See Roofing Profiles Metrospan: See Smartspan® Mini Orb®: See CGI Mini Mini Corry®: See CGI Mini Monoclad®: See Superdek® Offset: A pipe fitting that directs a downpipe from the gutter, under the eaves soffit and down a wall. Oilcanning: Variation from flatness of sheet metal, creating undulations along the surface. The result is poor appearance and potential ponding. Pan: The flat portion between the ribs in a pan-type preformed sheet. Parapet: A wall on the perimeter of a building that projects above the line of the eaves.
Penetration: A projection through the roof, e.g. vent pipe, chimney or rooflight. Pierce-fastened: A method of fixing cladding by means of a screw or nail which pierces the cladding. Pitch: see Fall. Ponding: Pooling of undrained water on a roof. Pop: A short fitting in a gutter sole, where rainwater leaves the gutter. Prospan: See Smartspan® Rainhead: A box-shaped receptacle sometimes used between gutters and downpipes to provide an external overflow point. R-value: A value given for the resistance to heat transfer of a roof or wall system. Rib: A longitudinal upstand in cladding. Ridge Capping: Formed metal designed to weatherproof the junction at the apex of opposing roof slopes.
Roofing Profiles: This link will take you to our Roofing Profiles Page Sarking: A membrane to collect and discharge clear of the structure any water that may penetrate a roof or wall cladding. Shoe: A fitting used in a downpipe, to change direction of the downpipe by about 45 degrees. Smartspan®: See Roofing Profiles Soaker (gutter): A small gutter located on the upper side of a chimneystack. Soaker (flashings): Formed metal designed to weatherproof the perimeter of roof protrusions or penetrations. Soaker flashings are usually positioned under rather than over the surrounding metal roof. Sole: The internal, bottom surface of a roof gutter. Spandek Hi-Ten®: See Smartspan® Spigot: See Pop. Spreader: A downpipe-tee or elbow fixed at 90 degrees to the roof slope used to spread stormwater over a greater area of the roof. Spouting: See Gutter. Straps: A metal band used to secure a downpipe to a wall. Sump: A roof gutter pit used to connect downpipes to internal roof gutters. Superdek®: See Roofing Profiles Thermal Stress: Stress due to expansion and contraction caused by changes in temperature. Topdeck® 700: See Roofing Profiles Trays: See Pan. Trimclad®: See Superdek® Trimdek Hi-Ten®: See Superdek®
Valley Gutter: A gutter at the bottom intersection of two sloping roofs (also called a valley flashing). Valley Boards: Timber or profiled metal laid under a valley gutter to support it. Zincalume: Steel sheeting protected against corrosion by an aluminium-zinc coating. |
