Flat Roof Structural System

Flat roof structure.

Flat roof structural system.

The basic construction of a flat roof starts with roofing timber that is laid across two upright items usually two walls. Schletter flat roof systems are especially quick and easy to mount and can be adapted to all structural and construction conditions. It is a horizontal structural component with top and bottom surfaces parallel and near. 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.

Flat seamed structural panels. This traditional system requires a solid substrate. For additional stability you can also use steel joists that are built into one or both of the walls. 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.

The slope of a roof is properly known as its pitch and flat roofs have up to approximately 10. Built up roof bur the traditional hot tar and gravel roof is built from three or more plies of waterproof material alternated with hot tar and ballasted by a layer of smooth river stone. Flat roofs or low slope roofs are also commonly found on commercial buildings throughout the world. Flat roofs shall be designed to carry all imposed and dead loads acting on the structure of the roof.

It also requires the use of metals that can be soldered such as copper. Although simple and utilitarian the main goal of a roof system is to maintain the watertight integrity of a building and keep its contents dry. Dead loads from the self weight of the roof construction. Environmental loads such as snow water and wind loads should be calculated in accordance with bs en 1991.

A slab is a structural component that is used to create flat horizontal surfaces such as floors roof decks and ceilings. Our structural engineers calculate the optimum design for your roof and ensure that loads are optimally spread over the supporting structures and the reserve load capacity is not exceeded. Today s variety of flat or low slope commercial roofing options roof pitches ranging from 12 to 3 12 is no longer simple and has grown considerably in the last 50 years. Underneath the basics flat roofs are usually constructed with a ceiling nailed to joists which support a deck usually wood in residential construction a vapor barrier insulation and a roof board.

This can include epdm rubber and fibreglass talked about above but commonly especially in the trade and in this article it refers to pvc tpo tpe and pib. A flat roof is a roof which is almost level in contrast to the many types of sloped roofs. A slab is usually several inches thick and supported by beams columns walls or the ground. The metal roof systems design manual by the metal building manufacturers association provides further guidance pertaining to metal roof systems.

From there the flat roof system you choose will determine the materials you apply. 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. This will give additional stability to the roof structure.