Flat Roof Construction Detail

When building a flat roof it is vital that a degree of falls is built into the construction to ensure rainwater run off.

Flat roof construction detail.

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. Others would treat even steeper pitches as flat roofs. Insulation for the warm flat roof only the basic construction process.

Old asbestos roofs are often replaced with flat roofs. Flat roof construction for residential. It must provide adequate protection against the elements keeping the buildings structure and interior dry. Generally roofers discourage this method for cold climates because it can promote condensation and requires ventilating the roof which may be difficult to do in small or tight spaces.

A roof is considered to be flat when it is of a slope of 1 5 o to the horizontal. It dealt in detail with flat roof constructions and. A typical flat roof repair costs at least 350 400 and involves locating sources of leaks and patching the seams or holes. So any timber joists that are used need to be strong enough to support this weight.

If insulation is installed below the flat roof deck this is called a cold roof. A roof is defined in bs 6229 as a flat roof if it has a pitch of 10 degrees or less. Flat roof types. Flat roofs aren t architecturally logical as rain and snow will shed much more quickly off a sloped roof.

However depending on the severity of the damage and the type of material installed repairing a flat roof can cost as much as 600 800. As you may imagine there is a fair amount of weight involved here in terms of boards felt etc. Flat roof details and information relating to insulating a flat roof. It is for that reason that the flat roof construction manual focuses on the subject of designing energy saving flat roofs free from damage.

Cad details document name pdf dwg download all cad construction details 37 1 mb 3 4 mb mc01 identification of roof areas 694 kb 167 kb mc01a single layer underlayment 678 kb 302 kb mc01b double layer underlayment 711 kb 322 kb mc02 vent pipe flashing 626 kb 349 kb mc03 valley. Pvc membranes are easy to maintain and repair. Sizes of joists needed for flat roof construction. That will help you remember certain factors and details to build the best possible flat roof.

The definition of a flat roof according to bs 6229 is having a pitch less than 10 o to the horizontal however some in the industry would consider up to 15 o as their definition of a flat roof. To build a flat roof you ll want to have a thorough understanding of how the process of constructing the flat roof works and the different methods available. Details both in 2d and 3d to give a clear understanding.