Flashing 2 Roofs Together

Finish by nailing osb sheathing metal flashing metal drip edge and overlap the new shingles between two joined roofs.

Flashing 2 roofs together.

Step 6 install the flashing. Place the 2 by 4 inch piece of lumber along the center of the flashing. At the low end of the valley the subfascias of the two roofs are mitered with a block filling in the roof framing. Roofs peel off from the edges so it is critical to hold them tight with the roof deck sealed on the outside we turn to flashing the edges with metal and membranes metal drip edge flashing image details roofing wrb flashing.

Well engineered and properly installed two part flashing can handle this movement with no problem. Here on this roof in sheffield one roof is spanish slate and the other is man made slate. Install valley battens on both ends of the roof valley then attach first flashing 3 4 inches over the roof flange and another 3 4 inches over the fascia if any is present. The base flashing or apron flashing is the bottom piece.

Next put the flashing between two roof pitches. Remember to caulk the underside of the flashing with a sealant. Sheathing blocking is added along the valley and the sheathing pieced in for both roof planes. This is where joining two pitched roofs together starts.

Below are the steps on how to join two roofs together if they have different pitch. Two part flashing systems consist of a base flashing often step flashing that is laced into the finished roof material. The flashing materials will continue to be leak proof if they can withstand this movement of the roofing materials. Slide the right edge of the flashing under the highest roof pitch.

There is another benefit to two part flashing. A quick video on joining two roofs together. Slide the flashing under the highest roof pitch first and followed by the lower pitch. To bend the flashing use a 2 by 4 lumber by pressing it gently until the flashing gets bent and matches the slope.

Joining two roofs with different pitches. To transition the eaves the horizontal fascia extends to the last rafter tail and a vertical return finishes the transition. Position the flashing between the two roof pitches.