How To Connect Patio Roof At Different Levels

Attaching a patio cover to an existing roof can be done in various ways depending on how you want it to look.

How to connect patio roof at different levels.

Attach the horizontal beam by using a nail gun. The piece that allows us to join the two different slopes is the pitch transition trim. Slide the right edge of the flashing under the highest roof pitch. This is the simplest way to attach a patio cover to your house.

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. Place the 2 by 4 inch piece of lumber along the center of the flashing. Make a cutting on one of the sides of the horizontal roof beam on an angle. This allows water to flow off the upper panels out over the trim onto the lower panels and exits the roof at the eaves.

To make the bottom cut i laid out a level cut for a 4 in 12 pitch. Remove siding from the house where the new roof will attach to expose rafters or other framing of the old roof. We re going to install it over top of the panels that have already been installed on the lower slope. Connect a flat roof to a sloped or pitched roof with a ledger board.

Ways to attach a patio roof to a house. Position the flashing between the two roof pitches. To let the jacks sit plumb on top of the sleepers we angled the level cuts to the 3 1 2 in 12 pitch of the shed roof setting the circular saw to a 16 degree bevel the degree equivalent of a 3 1 2 in 12 pitch. After that to make it flush with the roof of the existing house cut the two outer rafters.

You have to do it thoroughly so that the rafters sit flush on it.