Framing A Flat Roof Addition

The framing of a basic gable roof is based on a right angle triangle and the various roof framing components fit the triangle.

Framing a flat roof addition.

To keep water from pooling at these inside corners tom rips 2x4s lengthwise on a 45 degree bevel with a table saw. The third tactic for your house addition is to expand an upper level out across an existing one story section such as a flat roof garage or porch. This will seal the parts of the roof together and reduce the risk of leaking. Roof overhang with a new cornice will make this building look like it was added on in 1900 not 1960.

On two sides the roof abuts a parapet a short wall common around flat roofs as well as a wall for the third floor. How to tie a additions roof to existing roof roof designs to attach to existing home how to construct a roof from an exsisting shead how to attach a deck roof to existing roof how to add a roof over porch cost to tie into existing roof attache porch roof on house attach shed roof to house adding a roof to screened in porch adding a roof to existing. If done properly the flat roof can be tied in so that it doesn t change the look of the house at all. Frame the roof one important and perhaps not so obvious fact is that a flat roof is not actually flat.

When matched to the angle and proportions of other rooflines on the house your gable roof will add visual interest and character to the home making the addition look like an asset that belongs with the house. The 8 step process for diy installation step 1. Rather than a single slope a gable roof consists of two slopes that meet at a peak running down the middle of the roof. Add the plywood once you ve added the framing it s time to add a layer of 5 8 inch plywood sheathing.

The run or half the building span is the base of the triangle. Connect a flat roof to a sloped or pitched roof with a ledger board. And the line length measurement from the roof peak to the building wall is the hypotenuse. Step 1 plan.

The original roof had no overhang. The rise or height of the roof at its peak is the altitude of the triangle. Remove siding from the house where the new roof will attach to expose rafters or other framing of the old roof. Here the rubber roof will need to run up the walls and glue to the sheathing.

This addition looks like a floating box.