How To Extend Roof Rafters

These rafters require extra measurement to mesh the hip gable to the ridge beam properly.

How to extend roof rafters.

Set up scaffolding. You could simply support it on the existing wall and install it without a splice. If the main rafter is only sticking out a short distance i e. Secure each tile with two large head roofing nails.

Figure the rafter depth needed to provide the desired r value. Lay 10 or 12 inch tiles with 1 inch head lap on the sides of dormers. For instance if the roof has 2 by 6 rafters and. Then this is not an extension to the rafter but a separate rafter.

The two rafters would not have to line up but that would be simpler for installation. You need to get up to the area that you are going to extend. If you re using a 2x4 it ll measure 1 5 inches 3 8 cm. If you are.

If the existing rafters have bird s mouth cuts where they sit on the exterior wall plate use. Measure the width of the ridge beam. Remove the drip edge and the facia trim. How to extend rafters determining rafter length.

Attach 1 2 inch wood cleats to both sides of the existing rafter. At the beam end the rafters are fastened with a 10 inch structural screw through the top of the rafter into the beam. Lay all tiles within 1 foot of hips ridges and abutting vertical surfaces in roofer s cement. Strip off the first 3 layers or more of shingles going up the roof the length of the work area.

They extend diagonally so that one end or both of a rectangular shed roof is slanted perpendicularly to the gable roof in the midsection of the shed. 1 or 2 ft. The roof deck is 1x6 attached to the top of the rafters with 1 4 inch space between boards. Use cleats the same length as the width of the.

To get a visual idea of what the new overhang will look like take a photo of the house from. The ridge beam is the vertical piece of plywood which will form the peak of the gable and to which you ll fasten the rafters on either sides. Follow safe working procedure falling. The blocking is held low to hide the roof wall intersection and to provide a 1 inch air space at the top for a ventilation channel.