Caulking Fiber Cement Siding

Best caulk for fiber cement siding or hardiplank siding lets you have the perfect sealing your surface needs.

Caulking fiber cement siding.

Jaime prefers to use the vinyl mounting blocks typically used with vinyl siding. They re cheaper and easy to install and you can cut the proper size hole in a plastic mounting block with a utility knife or a snips. Most fiber cement manufacturers make mounting blocks for lights electrical receptacles a c lines pvc venting etc. That is why we are showing you some other products for various surfaces along with our top pick.

Instead we snug the joints up tight and. Fiber cement boards are caulked only when there is no metal flashing behind them. 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. 2 house built before 2008 so has no flashing okay to caulk.

Caulking around windows doors eaves and trim edges gives added insurance that leaks will not occur. We only caulk butt joints on cedar siding if previously caulked. 1 i chose this caulk because it has 25 flexibility compared to silicone based caulk. A mark parlee a general contractor in des moines iowa responds.

Dap alex plus 12 pack 10 1 oz white paintable latex caulk. On our jobs we typically don t leave gaps for caulk at butt joints because this detail can contribute to the problem. Flashing acts as a. 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.

When james hardie siding products butt into wood based materials a 1 8 gap will allow for expansion and contraction of the wood based product. Item 157140 model 11532. Natural siding boards are designed to expand and contract with the elements and we do not want any adhesive to prevent their natural movement.