How To Frame A Roof Opening

It s easy for the contractor to build and easy on the homeowner s budget says schultz but it makes the new space look like an obvious add on.

How to frame a roof opening.

Header and trimmer joists shall be fabricated from joist and track members having a minimum size and thickness equivalent to the adjacent ceiling joists or roof rafters and shall be installed in accordance with figures r804 3 5 1 and r804 3 5 2. Next use these calculations to determine how many rafters you ll need for your roof and cut them to size. Whatever your choice make sure to take the regional climate into consideration. Measure down y height from the long point of the rafter cut and make a mark.

This will the first point of the rafter measurement line. For example you may want a steep pitched roof or perhaps a flat one. And the line length measurement from the roof peak to the building wall is the hypotenuse. This is the simplest solution a single slope that s attached to the original house at the high point and slants down to the outer wall of the addition.

In this video i teach you how to frame a 16 o c. The rise or height of the roof at its peak is the altitude of the triangle. The framing of a basic gable roof is based on a right angle triangle and the various roof framing components fit the triangle. The run or half the building span is the base of the triangle.

From one end of the rafter material using a speed square or framing square mark an x in 12 angle on the rafter and cut it. From bottom plates to top plates crowning studs and blocking for added rigidity. Then gather your measurements by calculating the run rise and length of each rafter segment in feet and the pitch of your roof in inches. Openings in roofs and ceilings shall be framed with header and trimmer joists.

To frame a roof start by choosing a roof style like a frame or gabled. Flat roofs are great in climates with little rain but if you have a pitched roof you ll have the advantage of water draining away more easily. Header joist spans shall not exceed 4 feet 1219 mm in length.