Metal Roofing Terminology

Roof dormers provide light added space and ventilation to the topmost spaces in the house.

Metal roofing terminology.

This is used to provide wind resistance. Stone coated is metal roofing made from zinc or aluminum coated steel that is then coated with the same granules as composition shingles. What is a hip dormer. The exposed exterior roof surface consisting of metal panels.

Siliconized polyester is a solvent based system with polyester resin. Don t hesitate to give us a call with questions at 1 877 833 3237. Saturant asphalt used to impregnate felt for waterproofing and strength. To help you better understand more about metal roofing here is a list of common terms that you may encounter.

Purlins can be wood strips 1 x 2 or can metal and are usually a 1 subgirt material preferably galvanized steel. Triangular end of a building from cornice or eaves to ridge. Eaves on a sloped roof the horizontal underside that projects out from the house wall. Loads that are produced 1 during maintenance by workers equipment and materials and 2 during the life of the structure by movable objects which do not include wind snow seismic or dead loads.

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. Bmt base metal thickness is a term to describe the thickness of the metal used not including coatings or paint. Sheet metal used in waterproofing roof valleys or hips or the angle between a chimney and a roof. The lower part of a roof that overhangs the walls.

Sheet steel with a thin aluminum coating on the surface to enhance the steel s ability to withstand weathering. 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. It is attractive but faces similar problems of streaking granule loss and organic growth as traditional composition shingles. Open valley valley in which metal is used and roofing material does not cover entire valley area as in a closed valley.

A hip dormer is a structure that protrudes from the plane of the roof slope often with the addition of windows. Horizontal lengths of material wood or metal that are affixed to the roof and to which the finished roofing material is affixed.