Flashing Against Existing Panel Siding

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.

Flashing against existing panel siding.

But the j cap also creates a consistent line. Install the kickout flashing underneath the first shingle photo 1. In certain instances flashing may need to be installed on the exterior of siding. Since newer installation guidelines do not recommend caulking this joint but instead recommend leaving a small gap and flashing behind the ends of the siding i think it is more prudent to add flashings when it is possible to do so.

Flashing is a strip of metal usually aluminum about 8 inches long and bent at 90 degrees with each side at least 5 inches wide. Again allow for a 1 4 inch gap. It is always recommended to install step flashing behind stucco dryvit wood panel lap siding vinyl siding cedar shingle siding etc. Hold a panel at the correct height and against a window or other obstruction to mark for the horizontal part s of a cutout.

However in most instances step flashing should be installed behind siding. Cut 1 4 inch above the flashing or window. 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. 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.

Measure over from the other panel to mark the top and bottom of the vertical cut and snap a line between the marks. On a wall to be covered with wood cement board vinyl or metal. Flush the end of the flashing length with the wall corner and secure the flashing to the framing with an 8d nail at each wall stud.