Flashing Siding Installation

This helps ensure water has no chance to seep behind and damage the sheathing.

Flashing siding installation.

The first half of window flashing occurs when you or your builder preps the rough opening for the window s installation. This has proven problematic over time as caulking the joint results in unsightly surface appearances due to the different textures as well as resulted in failure of the caulk joint and associated ongoing maintenance. Install the first length of z flashing. Typically flashing a window is a two part process.

Now any water that runs inside the j channels will come out on top of the siding and out the weep holes designed for this purpose. 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. Align the step flashing with the leading edge of the starter course and nail it in place using one nail in the upper corner. If you were going to remove all of the siding for this repair you d install new housewrap and bring it down over the outside of the top of the zee flashing.

Leave a 1 4 inch gap between the step flashing and wood siding or cement board. It is always recommended to install step flashing behind stucco dryvit wood panel lap siding vinyl siding cedar shingle siding etc. If you are just removing bottom courses of siding then you might get away with gooey flashing tape image at left that is taped over the top of the flashing and whose upper half is well bonded to the plywood or board wall sheathing. A common problem with cement board siding products and some other types of horizontal lap siding is that older installation guidelines called for caulking the joint instead of flashing the joint.

Overlap the flashing onto the row of siding just below the window. The second half of window flashing occurs once the window unit is secured and squared within the rough opening. In certain instances flashing may need to be installed on the exterior of siding. Install the kickout flashing underneath the first shingle photo 1.

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. 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. Cut a piece of flashing out of felt paper and install it at the bottom corners of the windows before you install the side j channels. Add felt if needed before nailing the new wood on and prime the new wood on all four sides before installing it.

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. Nail j channel for vinyl or metal siding onto the flashing. To install the flashing cut pieces of building paper and self adhesive flashing to fit and install them in the correct order bottom sides top around the opening.