Framing Flat Roof Construction

Flat roofs are hard to replace.

Framing flat roof construction.

Below is an easy to follow manual for building flat roofs including a guide to flat roof framing and installation with plenty of details and specifications about the frame. This article describes and illustrates the different types of support that prevents roof sagging and wall bulging at buildings including definitions of collar ties rafter ties and structural ridge beams. While most home builders will outsource the construction of roofing trusses the rafter supports of the roof itself learning to frame a roof yourself is one of the true arts of carpentry and a basic primer is covered below. If you want a diy flat roof here are the steps to follow.

The framing of a basic gable roof is based on a right angle triangle and the various roof framing components fit the triangle. So any timber joists that are used need to be strong enough to support this weight. Collar ties rafter ties tension beams structural ridge beams. Flat roofs aren t architecturally logical as rain and snow will shed much more quickly off a sloped roof.

The run or half the building span is the base of the triangle. 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. Sizes of joists needed for flat roof construction. This is a completion video of a flat roof framing.

But now flat roofs often are constructed with fewer layers because of improved waterproofing technology. Some of these can support the roof and prevent ridge sagging and wall spreading. The rise or height of the roof at its peak is the altitude of the triangle. A skillion roof is made up of a single flat plane which slopes gradually from top to bottom.

This could mean flat roofs may not raise the same red flags they used to. Skillion roofs are one of the simplest roof styles used in shed building. Of course you don t need to live in a modern house to deal with a flat roof. Old asbestos roofs are often replaced with flat roofs.

This is a completion video of a flat roof framing. Framing a roof is the last step in framing new construction. Some observers suggest it s harder to replace a flat roof than a traditional pitched shingle roof because of the labor required to remove its layers especially on older flat roofs.