Framing Rafters Into Existing Roof For A Covered Porch

Then attach drip edge over the roofing paper.

Framing rafters into existing roof for a covered porch.

Frame your porch roof by continually adding rafters until it extends one foot past your porch walls or support columns. A fascia board which is a roofing material that helps compensate when there are inevitable inconsistencies in rafter length will mount on the front and on the sides of your porch roof frame. Once completed roofing paper will be installed. When building a porch roof asphalt shingles or other roofing material are then attached over the roofing paper and drip edge.

Now you can begin assembling the outer rafters and attaching the rafter beam to the edge of the roof of the house. After installing the rafters we still had to extend the porch roof back over the shed roof creating a valley on either side. When a shed roof ties into an existing roof the new roof could be a simple lean to that covers a deck or porch or it could be the shed roof of a substantial addition. On a two story house you can usually tie the ledger into a band joist also called a rim joist located between the floors as shown below.

After that to make it flush with the roof of the existing house cut the two outer rafters. Sheathing 1 2 inch plywood or osb is nailed to the rafters. In this video you will learn about figuring the angle for a top cut on porch rafters that are going over another roof surface and also about a useful jig to. Attach the horizontal beam by using a nail gun.