Roof Flashing Under Siding

Galvanized sheet metal bent at a 90 degree angle i e.

Roof flashing under siding.

Cement or roof caulk. This w shaped channel is placed over the top of building felt before the roof. Roof and siding install. How to install step flashing under siding.

Valley flashing protects the valleys where two roof planes meet. 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 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.

Otherwise the siding installer will need to be extra cautious. On the other hand you ll find some siding parts need to be nailed down under the roof shingles. Some roofing components such as the flashing are easier to install without the siding. While some skylight manufacturers include flashing in their products sometimes roofing professionals have to create it or purchase it separately.

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. Keep water out of your home and running down the roof where it belongs with appropriate use of step flashing. How to install step flashing. Open valleys have metal flashing to protect this critical area of the roof.

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. Step flashing is used where a roof meets a. This flashing is typically field fabricated from a sheet of 26 ga. With the flashing in place let s see what happens.

The water then runs off the flashing because it can t go up the flashing as it extends up behind the siding. I made this video this morning and i hope it help explain the flashing wall detail where the siding meets the roof. Roof side flashing should be folded down over facing boards along roof lines. Slipping sticky roof membrane under existing step flashing.

Take the first flashing piece at roof bottom and slice it at around 4 inches with tin snips. Videos roofing wrb flashing siding exterior trim. Bent into an l shape. In this sense it seems more practical to install the siding first.