Roof Flashing Under Siding

How to install step flashing.

Roof flashing under siding.

Keep water out of your home and running down the roof where it belongs with appropriate use of step flashing. Take the first flashing piece at roof bottom and slice it at around 4 inches with tin snips. 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. 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.

Roof side flashing should be folded down over facing boards along roof lines. 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. Posted march 4 2017 filed under roof installation roof repair maintenance.

Slipping sticky roof membrane under existing step flashing. Galvanized sheet metal bent at a 90 degree angle i e. 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. This flashing is typically field fabricated from a sheet of 26 ga.

With the flashing in place let s see what happens. Videos roofing wrb flashing siding exterior trim. Roof and siding install. Step flashing is used to provide a water tight connection where roofing adjoins a vertical juncture.

Bent into an l shape. Step flashing is used where a roof meets a. The edge of the roof has thin metal flashing that helps water drip off the roof without damaging the home or causing a leak. In this sense it seems more practical to install the siding first.

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. How to install step flashing under siding. Valley flashing protects the valleys where two roof planes meet.

Cement or roof caulk. While some skylight manufacturers include flashing in their products sometimes roofing professionals have to create it or purchase it separately. I made this video this morning and i hope it help explain the flashing wall detail where the siding meets the roof. Some roofing components such as the flashing are easier to install without the siding.