Residential Flat Roof Construction Details

Flat roofs come in many shapes and sizes which include parapet roofs roof decks and green roofs to name just a few of the options available.

Residential flat roof construction details.

The steels or rsj s rolled steel joists are often built into one or both walls to give added stability to the roof structure. A flat roof must be strong durable and stable throughout its lifetime. Although flat roofs are cheaper to build than pitched roofs they have a shorter life span. This will give additional stability to the roof structure.

The basic construction of a flat roof starts with roofing timber that is laid across two upright items usually two walls. Most flat roofs are typically not as long lasting or durable as sloped ones because the latter shed snow and rain a lot quicker. Waterproof membrane to prevent water penetrating the structure and interior of the building. From there the flat roof system you choose will determine the materials you apply.

It must provide adequate protection against the elements keeping the buildings structure and interior dry. Flat roof types. 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. Flat roofs actually slope up to approximately ten degrees to shed water.

Traditional homes often have sections of flat roof over shed dormers above porches and garages and on balconies. A roof is considered to be flat when it is of a slope of 1 5 o to the horizontal. A classic flat roof is either almost completely level or has a very slight pitch of 3 in 12 inches or less. A flat roof usually consists of the following.

However over the last few decades new and advanced materials have been developed. Flat roofs on houses are primarily found in arid regions. Ultimately a flat roof should play a part in a total architectural composition and has the ability to enhance the aesthetic and practical outcomes of a home. Flat roof construction for residential.

For additional stability you can also use steel joists that are built into one or both of the walls. 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. And their horizontal lines abound in the west and in urban areas. A roof is defined in bs 6229 as a flat roof if it has a pitch of 10 degrees or less.

Pros and cons for flat roof materials 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.