How To Extend Roof Rafters

How to increase rafters for insulation step 1.

How to extend roof rafters.

If the main rafter is only sticking out a short distance i e. How to extend rafters determining rafter length. Set up scaffolding. Strip off the first 3 layers or more of shingles going up the roof the length of the work area.

For instance if the roof has 2 by 6 rafters and. 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. Double the tiles at eaves and project them 1 inch over the rear edge of gutters.

If the existing rafters have bird s mouth cuts where they sit on the exterior wall plate use. The two rafters would not have to line up but that would be simpler for installation. Secure each tile with two large head roofing nails. If you are.

Lay 10 or 12 inch tiles with 1 inch head lap on the sides of dormers. Remove the drip edge and the facia trim. You need to get up to the area that you are going to extend. Subtract the width of your ridge beam.

To get a visual idea of what the new overhang will look like take a photo of the house from. 1 or 2 ft. Use cleats the same length as the width of the. Figure the rafter depth needed to provide the desired r value.

Lay all tiles within 1 foot of hips ridges and abutting vertical surfaces in roofer s cement. Measure the width of the ridge beam. You could simply support it on the existing wall and install it without a splice. 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.

The roof deck is 1x6 attached to the top of the rafters with 1 4 inch space between boards. Then this is not an extension to the rafter but a separate rafter. At the beam end the rafters are fastened with a 10 inch structural screw through the top of the rafter into the beam. Follow safe working procedure falling.