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.
Flashing for wood siding.
In certain instances flashing may need to be installed on the exterior of siding.
Siding nails should not be caulked another item that needs room to play is siding boards themselves.
Install the kickout flashing underneath the first shingle photo 1.
The best solution is a preformed or custom bent kick out flashing to divert the water away from the siding.
Otherwise dripping water will leave its mark along the siding.
Where the step flashing terminates along a sidewall is a common trouble spot for moisture problems.
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.
But unlike fiber cement siding wood is almost sure to rot.
However in most instances step flashing should be installed behind siding.
For a wood window unit drip cap flashing can be installed over the trim piece often called brick molding that comes.
Continue installing the z flashing at the top edge of the siding panels across the full length of wall.
It is used to protect the horizontal joints between sheets of siding from water infiltration.
It is always recommended to install step flashing behind stucco dryvit wood panel lap siding vinyl siding cedar shingle siding etc.
Metal flashing or any metal to wood joint should not be caulked another water exit pathway that should never be sealed.
Galvanized steel z flashing is made from 28 gauge galvanized steel.
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.
Also avoid caulking tongue and groove siding boards together.
The seat dimension 3 8 in corresponds to the siding thickness.
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.
The large leg of the metal goes against the wall leaving the seat and face covering the top edge of the siding.
The type and location of the flashings will vary depending on the type of windows and doors.
And when those corners start to decay they become.
The nails holding up the siding should not be caulked.
