Flat Roof Extension Construction Details

Joists are placed on edge spaced at 400 600mm centres supported by external and internal load bearing walls.

Flat roof extension construction details.

Trada and approved document part a give guidance on sizes of joists for flat roofs relating to spans and loading. 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. The construction of the flat roof is similar to that of the timber upper floor. Additional construction details drawings as well as the small selection of foundation wall floor and roof construction detail drawings shown here many of the building notes have a related construction detail drawing with specific dimensions eg rafter sizes spans insulations types for purchase with the building specifications.

Flat roofs aren t architecturally logical as rain and snow will shed much more quickly off a sloped roof. Old asbestos roofs are often replaced with flat roofs. It is the standard method employed on flat roofed extensions but it is rarely used for new builds today. It must provide adequate protection against the elements keeping the buildings structure and interior dry.

Sizes of joists needed for flat roof construction. In general a warm roof is preferable from a construction angle but it does lead to a higher roof profile which isn t always acceptable. Insulation for the warm flat roof only the basic construction process. That will help you remember certain factors and details to build the best possible flat roof.

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. The excitement of starting a new construction project or building venture can lead you to forget about the finer details such as planning permission and local building. A flat roof must be strong durable and stable throughout its lifetime. Flat roof extensions can provide a simple cost effective solution that ticks all the right boxes especially for many smaller extensions.

They are common on extensions garages and commercial buildings. Flat roof types. As you may imagine there is a fair amount of weight involved here in terms of boards felt etc. Flat roof construction design flat roof construction detail flat roof construction detail dwg flat roof construction details australia flat roof construc.

Flat roof structures offer numerous advantages from design and material options through to cost. Of course you don t need to live in a modern house to deal with a flat roof. So any timber joists that are used need to be strong enough to support this weight.