Metal Roofing Terminology

Purlins can be wood strips 1 x 2 or can metal and are usually a 1 subgirt material preferably galvanized steel.

Metal roofing terminology.

Roof dormers provide light added space and ventilation to the topmost spaces in the house. Bmt base metal thickness is a term to describe the thickness of the metal used not including coatings or paint. Siliconized polyester is a solvent based system with polyester resin. Sheet metal used in waterproofing roof valleys or hips or the angle between a chimney and a roof.

Triangular end of a building from cornice or eaves to ridge. An l shaped metal strip positioned along a roof s edges to allow water to run off the roof without running down the eaves or siding. To help you better understand more about metal roofing here is a list of common terms that you may encounter. It is attractive but faces similar problems of streaking granule loss and organic growth as traditional composition shingles.

Saturant asphalt used to impregnate felt for waterproofing and strength. The exposed exterior roof surface consisting of metal panels. A hip dormer is a structure that protrudes from the plane of the roof slope often with the addition of windows. What is a hip dormer.

Open valley valley in which metal is used and roofing material does not cover entire valley area as in a closed valley. Stone coated is metal roofing made from zinc or aluminum coated steel that is then coated with the same granules as composition shingles. The lower part of a roof that overhangs the walls. Horizontal lengths of material wood or metal that are affixed to the roof and to which the finished roofing material is affixed.

A drip edge is a strip of material typically metal installed along the roof edges so water won t drip onto the eaves siding or deck. Seal down a factory applied asphalt strip used to bond a shingle to the one above. Batten a batten is a piece of timber or metal channel installed horizontally on top of the rafters to allow sheet metal to be laid and fastened. We ve helped hundreds of people just like you save money on their projects whether it be diy metal roofing material for their new home or installing a new steel roof over an old leaking roof.

Sheet steel with a thin aluminum coating on the surface to enhance the steel s ability to withstand weathering. Eaves on a sloped roof the horizontal underside that projects out from the house wall.