To tie into existing roof shingles use a cut valley. Install trusses to meet the eave of the house and nail 2 valley boards into place, securing with roofing cement. Frame and sheathe the addition roof, and snap a line on the existing shingles 2 inches above the valley.

Start by measuring and marking where the new rafters will be attached to the existing roof. Then, carefully cut away any roofing material that may obstruct proper integration. Install flashing to prevent water leakage and apply roofing cement for added protection.

To attach the lean-to roof to an existing roof, we recommend using metal brackets or beams for added support. These should be securely fastened to both roofs, ensuring a tight fit and preventing any movement or sagging. Additionally, it is important to seal all seams and joints with appropriate roofing sealant or flashing tape.

There are several ways to attach a patio roof to an existing house, including ledger boards, anchor bolts or lag screws. The most common method is using a ledger board that attaches directly onto the exterior wall of your home. When selecting an attachment method, it’s important to consider factors such as wind loads and snow loads in your area.