Flat Roof Structure Terminology

The national roofing contractors association defines a low slope roof as.

Flat roof structure terminology.

A flat roof is a roof which is almost level in contrast to the many types of sloped roofs. Flat roofs usually come with a 10 to 20 year warranty but can last 25 years if you build the roofs right and maintain them using commonsense rules. Pitched or sloping roofs. A low slope or flat seeming roof covered with alternating layers of roofing felt and hot mapped asphalt and topped off with a layer of gravel.

The main factors which influence the shape of roofs are the climate and the materials available for roof structure and the outer covering. A roof that rises by. A roof s slope is the number of inches it rises for every 12 inches of horizontal run a roof with a 4 in 12 slope rises 4 inches for every 12 inches of horizontal run. 3 part of a suspended timber floor construction that provides a level bearing and.

The portion of the roof projecting out from the side walls of the house. The edge created by folding metal back on itself. A type of roofing used primarily in flat or nearly flat roofs. The slope of a roof is properly known as its pitch and flat roofs have up to approximately 10.

There are two main types of roof construction. The edge of a roof which runs from eaves to ridge at a gable. Roof shapes vary from almost flat to steeply pitched. Flat roofs are an ancient form mostly used in arid climates and allow the roof space to be used as a living space or a living roof.

As the name suggests a flat roof is specially designed to sit as flat as possible on the top of a property typically having a pitch no greater than 15. Roof terminology is also not rigidly defined. Pvc and tpo membranes are considered thermoplastic membrane. Method of melting and fusing together the overlapping edges of separate sheets or sections of polymer.

Canopy any overhanging or projecting roof structure. The inclined external angle formed by the intersection of two sloping roof planes. 1 part of a pitched roof construction that receives the feet of the spars sp ars and ceiling joist ends. Pvc and tpo membranes are considered thermoplastic membrane.

The same roof has a 4 12 or 1 3 pitch. Built up roof bur the traditional hot tar and gravel. All three types of flat roofing cost 250 to 350 per square 100 square feet but prices vary according to region and size of the roof. Usages vary slightly from region to region or from one builder or architect to another.

2 part of a flat roof structure that receives the ends of the flat roof joists. Flat roofs or low slope roofs are also commonly found on commercial buildings throughout the world. Below are some commonly used terms that identify parts of a roof and types of roofing.