Flashing For Wood Siding

In certain instances flashing may need to be installed on the exterior of siding.

Flashing for wood siding.

This article series discusses best practices construction details for building exteriors including water and air barriers building flashing products installation wood siding material choices installation vinyl siding stucco exteriors building trim exterior caulks and sealants. It is always recommended to install step flashing behind stucco dryvit wood panel lap siding vinyl siding cedar shingle siding etc. 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. Continue installing the z flashing at the top edge of the siding panels across the full length of wall.

But unlike fiber cement siding wood is almost sure to rot. Position the flashing lengths as defined in step 2 overlapping the ends a minimum of 2 inches onto the previous flashing piece and securing the flashing with 8d nails at each wall stud. And when those corners start to decay they become. Where the step flashing terminates along a sidewall is a common trouble spot for moisture problems.

Galvanized steel z flashing is made from 28 gauge galvanized steel. If you have vinyl or metal flanged windows for instance you can install drip cap flashing 4 the home depot over the window itself or over the top trim piece that you install. Metal flashing or any metal to wood joint should not be caulked another water exit pathway that should never be sealed. The seat dimension 3 8 in corresponds to the siding thickness.

Siding nails should not be caulked another item that needs room to play is siding boards themselves. The large leg of the metal goes against the wall leaving the seat and face covering the top edge of the siding. However in most instances step flashing should be installed behind siding. It is used to protect the horizontal joints between sheets of siding from water infiltration.

When it comes to flashing siding corners many builders simply use a 1x wood corner. The type and location of the flashings will vary depending on the type of windows and doors. Install the kickout flashing underneath the first shingle photo 1. On a wall to be covered with wood cement board vinyl or metal siding the step flashing and associated roofing must be installed first so the siding can cover the top of the step flashing on.

The nails holding up the siding should not be caulked. Also avoid caulking tongue and groove siding boards together. Wood siding flashing details at joints corners. Otherwise dripping water will leave its mark along the siding.