Fiber cement boards are caulked only when there is no metal flashing behind them.
Flashing under cedar siding.
You do have to trim the top starter course shingle with a triangle shaped cut to allow this.
Flashing must be overlapped by the moisture barrier.
If the kick out and step flashing can t tuck behind the siding screw on cap flashing to cover it then caulk along the top.
Flashing intercepts and directs the flow of water away from the building to designed drainage paths.
The top of the step flashing is still under the siding or plaster.
Otherwise it is possible for water to wick up the shingles and into the wall.
It is always recommended to install step flashing behind stucco dryvit wood panel lap siding vinyl siding cedar shingle siding etc.
Step flashing is used where a roof meets a.
Use a felt paper spline wrapped around the corner and extending 6 inches beyond the corner board to protect the joints where the siding meets the corner boards see figure 1 5 at left.
Cedar shingle siding must never rest on the horizontal surface of flashing.
Inspect the sidewall around and underneath the fascia and inside the house for signs of moisture damage and repair any rotted areas.
Failing to replace step flashings when a cedar shake roof is replaced with a composition shingle roof.
Natural siding boards are designed to expand and contract with the elements and we do not want any adhesive to prevent their natural movement.
Step flashings on a cedar shake roof are typically installed every 10 inches.
Before installing siding make sure that flashings are installed to prevent moisture from entering wall and roof spaces.
Keep water out of your home and running down the roof where it belongs with appropriate use of step flashing.
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.
Add felt if needed before nailing the new wood on and prime the new wood on all.
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.
Put the bottom step flashing on the starter course then bend the bottom of the step flashing out about 1 to 1 away from the wall.
Flashing is an important line of defense in controlling moisture in wall assemblies.
This has proven problematic over time as caulking the joint results in unsightly surface appearances due to the different textures as well as resulted.
Flashing should be made from a non corrosive material and should extend a minimum of 2 vertically up the wall.
