Bottom Of Wall Siding Flashing Details

This intersection is critical.

Bottom of wall siding flashing details.

Slide the widest edge of a z flashing strip behind the upper siding panel. The bottom edges of each siding course are clipped together often including vent openings. It should tuck under the sheathing wrap above and over the flashing below. Wind blown rain can easily enter the wall at all sides of the windows as well as between siding segments and possibly at the wall bottom near those corner posts.

Flashing and trim always begin flashing installation from the bottom and work up so that upper flashings are lapped on top of lower flashings. 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. 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. In all cases make sure to detail the flashing membrane so that it sheds water.

The siding gets held up 1 8 or so above the head flashing which should have end dams formed on both sides. The z flashing resembles the letter z from the side and comes in strips about 10 feet long. Reinstall new wood shingles keeping the bottom of the shingle 1 2 above the roof surface below. Endlap flashings a minimum of 6 and seal the lap joints with sealant.

This will prevent moisture from leaking under the flashings and into the structure. Inspect the sidewall around and underneath the fascia and inside the house for signs of moisture damage and repair any rotted areas. The same drip flashing that you typically use at the bottom of the wall gets used at the head and is shown on your drawing. Nail it to the sidewall or glue it if nailing isn t possible.

When the upper part of the. Thats a long way of saying. Install flashing under the bottom edge of the house wrap or other weather resistant barrier shingle fashion to direct water out of the wall. Overlap the flashing onto the row of siding just below the window.

If installed along the foundation the membrane should cover the joint where the sill meets the foundation. Lift the bottom shingle and slip in the kickout flashing. Installing a strip of self healing bituthane membrane like ice and water shield under the siding at the bottom of the wall may be a worthwhile investment. Stucco cladding install self adhesive flashing behind the weep screed a perforated metal strip at the base of the exterior walls at the height above grade specified by the local building code.

Aluminum wall siding is not a waterproof building skin.