Flashing Under Cedar Siding

The top of the step flashing is still under the siding or plaster.

Flashing under cedar siding.

How to install step flashing under siding. 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. Use a felt paper spline wrapped around the corner and extending 6 inches beyond the corner board to protect the joints where the siding meets the corner boards see figure 1 5 at left. Flashing intercepts and directs the flow of water away from the building to designed drainage paths.

Fiber cement boards are caulked only when there is no metal flashing behind them. Before installing siding make sure that flashings are installed to prevent moisture from entering wall and roof spaces. Building siding flashing finish details for building corners use overlapping 1x4s or 1x6s at outside corners or use 5 4 stock for a heavier look. Put the bottom step flashing on the starter course then bend the bottom of the step flashing out about 1 to 1 away from the wall.

It is always recommended to install step flashing behind stucco dryvit wood panel lap siding vinyl siding cedar shingle siding etc. Flashing should be made from a non corrosive material and should extend a minimum of 2 vertically up the wall. This has proven problematic over time as caulking the joint results in unsightly surface appearances due to the different textures as well as resulted. Add felt if needed before nailing the new wood on and prime the new wood on all.

Otherwise it is possible for water to wick up the shingles and into the wall. Natural siding boards are designed to expand and contract with the elements and we do not want any adhesive to prevent their natural movement. Step flashing is used where a roof meets a. Flashing is an important line of defense in controlling moisture in wall assemblies.

Inspect the sidewall around and underneath the fascia and inside the house for signs of moisture damage and repair any rotted areas. We only caulk butt joints on cedar siding if previously caulked. You do have to trim the top starter course shingle with a triangle shaped cut to allow this. Step flashings on a cedar shake roof are typically installed every 10 inches.

Install the flashing before you finish the top of the brick wall as the flashing must go behind the siding as well as behind and under the top row of bricks that angle outward to cover the top. Flashing must be overlapped by the moisture barrier. Keep water out of your home and running down the roof where it belongs with appropriate use of step flashing.