Flat Roof Details Uk

Although flat roofs are cheaper to build than pitched roofs they have a shorter life span.

Flat roof details uk.

A roof is considered to be flat when it is of a slope of 1 5 o to the horizontal. A roof is defined in bs 6229 as a flat roof if it has a pitch of 10 degrees or less. The basic construction of a flat roof starts with roofing timber that is laid across two upright items usually two walls. 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.

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. Having a manual for warm flat roof construction with details and a summary of rules to follow helps. It must provide adequate protection against the elements keeping the buildings structure and interior dry. Flat roofs were uncommon in the uk until after the second world war.

The longevity of the roof depends on the quality of the materials used. 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. 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.

In the traditional poor and roll process bitumen is supplied in blocks broken up and heated on site in a boiler until molten. Waterproof membrane to prevent water penetrating the structure and interior of the building. We love the flexibility of a flat roof for certain design limitations but they have a bit of reputation for leaks and repairs. For additional stability you can also use steel joists that are built into one or both of the walls.

Flat roof construction for residential. As a mass rebuild of housing got underway it was discovered to be a cheaper alternative to the traditional pitched roof style. What pitch is a flat roof. There is also the scope to incorporate a green roof onto the flat structure.

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. Of course flat roofs are not flat but have a very slight roof pitch of between 1 4 to 1 2 per foot. A flat roof must be strong durable and stable throughout its lifetime. Flat roofs are exceedingly popular with those looking to create a cool modern home.

Just enough slope to drain water but also flat enough to be a problem if not constructed properly.