Roof Framing Plan For Flat Roof

Flat roofs aren t architecturally logical as rain and snow will shed much more quickly off a sloped roof.

Roof framing plan for 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 framing of a basic gable roof is based on a right angle triangle and the various roof framing components fit the triangle. Frame the roof one important and perhaps not so obvious fact is that a flat roof is not actually flat. Add the plywood once you ve added the framing it s time to add a layer of 5 8 inch plywood sheathing.

Transfers the loadof the roof through the raftersto walls below. If you build a flat roof try to have it slope in multiple directions to drains or gutters. The run or half the building span is the base of the triangle. A flat roof has a slope of 1 8 per foot to 2 12.

The rise or height of the roof at its peak is the altitude of the triangle. Part iii you are here 01 thats me hauling the r 38 insulation up the ladder. Think of a flattened hip roof. For an existing addition on a circa 1912 residence in newport ri part i.

Of course you don t need to live in a modern house to deal with a flat roof. Roof framing simply describes how a group of rafters and beams are fitted or joined together in order to provide support for the roof covering. The point at which all the raftersare attached to. A roof framing plan shows the size and direction of the construction 425 figure 20 1 the shape of the roof can play an important role in the design of the structure as seen in this home by the architect robert roloson.

It is not ideal for snow or heavy rain but modern materials and proper drainage have helped. The 8 step process for diy installation step 1. Ridge board ridge beam. Parts of a roof.

A ridge board is a horizontal member of the roof frame. And the line length measurement from the roof peak to the building wall is the hypotenuse. Roof framing plans are usually required for complicated residential roof shapes and for most commercial projects. 02 filling the 2x10 rafter bays with a nice blanket of insulation.

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. From there the flat roof system you choose will determine the materials you apply. Ridge board v s beam. Re framing a flat roof in preparation for a new rubber membrane.