Flat Roof Details Uk

Waterproof membrane to prevent water penetrating the structure and interior of the building.

Flat roof details uk.

Flat roof options help to free up internal space and are often cheaper that pitched roof options as they require fewer materials to cover the same roof span. Flat roof construction for residential. On a basic level flat roof construction comes in the form of roofing timbers or joists as they are more commonly known or steels that are laid across two uprights walls in most cases. Having a manual for warm flat roof construction with details and a summary of rules to follow helps.

Flat roofs were uncommon in the uk until after the second world war. There is also the scope to incorporate a green roof onto the flat structure. The steels or rsj s rolled steel joists are often built into one or both walls to give added stability to the roof structure. As a mass rebuild of housing got underway it was discovered to be a cheaper alternative to the traditional pitched roof style.

Although flat roofs are cheaper to build than pitched roofs they have a shorter life span. For additional stability you can also use steel joists that are built into one or both of the walls. The basic construction of a flat roof starts with roofing timber that is laid across two upright items usually two walls. The longevity of the roof depends on the quality of the materials used.

A flat roof must be strong durable and stable throughout its lifetime. A roof is defined in bs 6229 as a flat roof if it has a pitch of 10 degrees or less. From there the flat roof system you choose will determine the materials you apply. 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.

A roof is considered to be flat when it is of a slope of 1 5 o to the horizontal. Types of flat roof coverings other flat roof construction details often refer to the types of flat roof coverings. A flat roof usually consists of the following. It must provide adequate protection against the elements keeping the buildings structure and interior dry.

A waterproof exterior layer is essential and there are a number of options including bitumen based felt or asphalt epdm rubber and pvc based systems as well as cold applied liquid systems bitumen coverings. Bitumen felt flat roofs are affordable in price and provide a great waterproofing result. What pitch is a flat roof. We love the flexibility of a flat roof for certain design limitations but they have a bit of reputation for leaks and repairs.

Flat roofs are exceedingly popular with those looking to create a cool modern home.