Flashing Under Cedar Siding

It is always recommended to install step flashing behind stucco dryvit wood panel lap siding vinyl siding cedar shingle siding etc.

Flashing under cedar siding. If your house has a roof line that extends past a corner of two walls make the first piece of step flashing a corner. If the sidewall is stucco or solid wood like ours and you can t open it to get flashing behind it continue the step flashing to the peak of the roof then cover the step flashing with cap flashing photo 2. The objective of flashing around doors windows and other junctures is to keep water flowing down and out to the surface of the wall. 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.

Failing to replace step flashings when a cedar shake roof is replaced with a composition shingle roof. Use overlapping 1x4s or 1x6s at outside corners or use 5 4 stock for a heavier look. Improper flashing and excessive caulking can force and trap water in the wall. Install roofing felt before starting step flashing.

Run roofing felt up the wall about an inch higher than the wall side. If the shingle already has flashing on it the kickout flashing has to slip beneath it and you ll have to loosen or remove siding to do this. Step flashings on a cedar shake roof are typically installed every 10 inches. Building siding flashing finish details for building corners.