Roof Framing Plan For Flat Roof

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.

Roof framing plan for flat roof.

Supported by lally columns. Ridge board v s beam. The run or half the building span is the base of the triangle. 02 filling the 2x10 rafter bays with a nice blanket of insulation.

Flat roofs aren t architecturally logical as rain and snow will shed much more quickly off a sloped roof. The 8 step process for diy installation step 1. The framing of a basic gable roof is based on a right angle triangle and the various roof framing components fit the triangle. Parts of a roof.

Of course you don t need to live in a modern house to deal with a flat roof. For an existing addition on a circa 1912 residence in newport ri part i. Part iii you are here 01 thats me hauling the r 38 insulation up the ladder. Re framing a flat roof in preparation for a new rubber membrane.

Ridge board ridge beam. It is not ideal for snow or heavy rain but modern materials and proper drainage have helped. Think of a flattened hip 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.

Add the plywood once you ve added the framing it s time to add a layer of 5 8 inch plywood sheathing. The point at which all the raftersare attached to. If you build a flat roof try to have it slope in multiple directions to drains or gutters. Frame the roof one important and perhaps not so obvious fact is that a flat roof is not actually flat.

A ridge board is a horizontal member of the roof frame. From there the flat roof system you choose will determine the materials you apply. The rise or height of the roof at its peak is the altitude 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.

A flat roof has a slope of 1 8 per foot to 2 12. Ridge beam sits below the rafters. 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.