Roof Flashing Under Siding

This flashing is typically field fabricated from a sheet of 26 ga.

Roof flashing under siding.

Take the first flashing piece at roof bottom and slice it at around 4 inches with tin snips. Step flashing is used where a roof meets a. Keep water out of your home and running down the roof where it belongs with appropriate use of step flashing. Bent into an l shape.

Roof side flashing should be folded down over facing boards along roof lines. Drip edge metal valley flashing dormer chimney and kickout flashing are types of roof flashing that shed water away from the connections between roofs walls chimneys and other building assemblies. Even if the roof has been properly flashed against the sidewall this one hasn t water can still run down the side of the house and behind the siding causing rot. Step flashing is used to provide a water tight connection where roofing adjoins a vertical juncture.

The edge of the roof has thin metal flashing that helps water drip off the roof without damaging the home or causing a leak. With the flashing in place let s see what happens. On the other hand you ll find some siding parts need to be nailed down under the roof shingles. Galvanized sheet metal bent at a 90 degree angle i e.

Valley flashing protects the valleys where two roof planes meet. The flashing s vertical edge is usually tucked under siding or capped with a second counter flashing that is mortared into the chimney or caulked along a skylight so water can t sneak in behind it. In this sense it seems more practical to install the siding first. The water runs down the siding and at the bottom of the first row of vinyl siding it drips off and contacts the metal flashing as it runs across the top of the fascia board.

Otherwise the siding installer will need to be extra cautious. Some roofing components such as the flashing are easier to install without the siding. Cement or roof caulk. This w shaped channel is placed over the top of building felt before the roof.

How to install step flashing. How to install step flashing under siding. While some skylight manufacturers include flashing in their products sometimes roofing professionals have to create it or purchase it separately. The solution to rotting sidewalls is a small piece of bent metal called a kickout flashing at roofing suppliers which simply directs all that water away from the wall.

Open valleys have metal flashing to protect this critical area of the roof. Slipping sticky roof membrane under existing step flashing. Videos roofing wrb flashing siding exterior trim. I made this video this morning and i hope it help explain the flashing wall detail where the siding meets the roof.