Caulking Cement Fiber Siding

Fiber cement boards don t expand and contract much but leave a little room for expansion at the end joints and then fill the gap with caulk.

Caulking cement fiber siding.

Natural siding boards are designed to expand and contract with the elements and we do not want any adhesive to prevent their natural movement. Caulk is usually used with fiber cement siding to prevent water intrusion at the butt joints. We provide a table of all fiber cement siding installation clearance or gap specifications caulking requirements storage or moisture requirements. Flashing acts as a waterproofing layer for this type of siding and caulking will prevent the flashing from doing its job.

Many professionals like those at james hardie also agree that you should not use caulk on fiber cement siding unless there is no metal flashing underneath. Caulking around windows doors eaves and trim edges gives added insurance that leaks will not occur. Best caulk for fiber cement siding or hardiplank siding lets you have the perfect sealing your surface needs. Butt joints however should be nailed tightly together and should not be caulked.

So what i would tell you to do is to use a colored caulk to choose the caulk in the color of the siding. We organize include fiber cement siding gap repair advice from the manufacturer as well as from builders and building inspectors. What you want to use is a silicone caulk because it s the most permanent one. That is why we are showing you some other products for various surfaces along with our top pick.

It s got good adhesion and expands and contracts. Placing caulk over large portions of wood siding prohibits the natural movement of the wooden panels and can cause extensive damage to the exterior of your home. But you are correct that it is very difficult to paint. We only caulk butt joints on cedar siding if previously caulked.