Flat Roof Detail Construction

Trada and approved document part a give guidance on sizes of joists for flat roofs relating to spans and loading.

Flat roof detail construction.

Known technically as elastomeric or plastomeric roof membrane depending on the material single ply roofs come in a few different varieties including. A roof is defined in bs 6229 as a flat roof if it has a pitch of 10 degrees or less. 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. So any timber joists that are used need to be strong enough to support this weight.

A flat roof must be strong durable and stable throughout its lifetime. May 9 2017 explore bernice ohene s board flat roof construction on pinterest. 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. The membrane roof is the latest roofing technology and is also the roof of choice in commercial construction.

Going back about 120 years the grandfather of flat roofs is the built up roof. Joists are placed on edge spaced at 400 600mm centres supported by external and internal load bearing walls. Flat roofs aren t architecturally logical as rain and snow will shed much more quickly off a sloped roof. As you may imagine there is a fair amount of weight involved here in terms of boards felt etc.

Sizes of joists needed for flat roof construction. It must provide adequate protection against the elements keeping the buildings structure and interior dry. The construction of the flat roof is similar to that of the timber upper floor. That will help you remember certain factors and details to build the best possible flat roof.

See more ideas about flat roof roof roof construction. It is for that reason that the flat roof construction manual focuses on the subject of designing energy saving flat roofs free from damage. It dealt in detail with flat roof constructions and. Yet for historic modern style buildings like this old house s cambridge tv project flat roofs are at the core of the architecture meant to reflect the broad horizontal lines of the natural landscape.

A note to consider before construction. Flat roof types. If insulation is installed below the flat roof deck this is called a cold roof. Old asbestos roofs are often replaced with flat roofs.