How To Install Roof Flashing Against Wood Siding

Bent into an l shape.

How to install roof flashing against wood siding.

How to install step flashing under siding 1. Align the step flashing with the leading edge of the starter course and nail it in place using one nail in the upper corner. Galvanized sheet metal bent at a 90 degree angle i e. Use a square length of 5 4 stock at inside corners with a spline underneath.

Cover with cap flashing. Nail it to the sidewall or glue it if nailing isn t possible. Roof and deck flashing recommendations for coastal areas always lap flashing and other moisture barriers properly. A common problem area is the point where a gutter dies into an adjoining wall as the photo below illustrates.

Slip in the flashing. Lift the bottom shingle and slip in the kickout flashing. Do not rely on sealant as a substitute for proper lapping. This flashing is typically field fabricated from a sheet of 26 ga.

All end grain in the siding should be sealed after cutting with a water repellent preservative wrp or primer. A key part of my approach is using a special piece of flashing at this. Fasten that shingle with two galvanized nails at the. Imo and that is all it is.

Begin at either end of the wall and set the level middle section of the z flashing onto the top edge of the siding panel with the wider flange upward and against the wall framing. Cut a piece. If the kick out and step flashing can t tuck behind the siding screw on cap flashing to cover it then caulk along the top. Unless you re careful step flashing can allow water from the roof to slip behind the gutter and get behind the siding and even the housewrap.

Install the step flashing before running the first row of shingles install a piece of step flashing along the sidewall so that it sits tightly against the roof. With no caulk the joint is free to dry out when wet. The exterior of a house presents plenty of opportunity for leaks. Step flashing is used to provide a water tight connection where roofing adjoins a vertical juncture.

Use increased lap lengths for added protection. With the spline there is no need to caulk the joint. Install the first length of z flashing. Or pull the nails out of the closest layer of siding and slip the flashing up under it and hopefully under the moisture barrier.

Slice along the bend line about 4 inches into the first piece of flashing at the bottom of the roof with tin snips. Posted march 4 2017 filed under roof installation roof repair maintenance. Water penetration at deck ledgers can cause wood dry rot and corrosion of connectors leading to deck collapse.