How To Extend Roof Rafters

Use cleats the same length as the width of the.

How to extend roof rafters.

These rafters require extra measurement to mesh the hip gable to the ridge beam properly. Attach 1 2 inch wood cleats to both sides of the existing rafter. 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. You need to get up to the area that you are going to extend.

How to increase rafters for insulation step 1. How to extend rafters determining rafter length. At the beam end the rafters are fastened with a 10 inch structural screw through the top of the rafter into the beam. 1 or 2 ft.

Lay 10 or 12 inch tiles with 1 inch head lap on the sides of dormers. Double the tiles at eaves and project them 1 inch over the rear edge of gutters. To get a visual idea of what the new overhang will look like take a photo of the house from. Measure the width of the ridge beam.

For instance if the roof has 2 by 6 rafters and. You could simply support it on the existing wall and install it without a splice. Subtract the width of your ridge beam. Lay all tiles within 1 foot of hips ridges and abutting vertical surfaces in roofer s cement.

Figure the rafter depth needed to provide the desired r value. If you are. Then this is not an extension to the rafter but a separate rafter. If the existing rafters have bird s mouth cuts where they sit on the exterior wall plate use.

The roof deck is 1x6 attached to the top of the rafters with 1 4 inch space between boards. Remove the drip edge and the facia trim. Strip off the first 3 layers or more of shingles going up the roof the length of the work area. 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.

If you re using a 2x4 it ll measure 1 5 inches 3 8 cm. 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. Follow safe working procedure falling. The two rafters would not have to line up but that would be simpler for installation.