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.

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. 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. But you are correct that it is very difficult to paint.

Flashing acts as a waterproofing layer for this type of siding and caulking will prevent the flashing from doing its job. Item 157140 model 11532. 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. What you want to use is a silicone caulk because it s the most permanent one.

Trim boards wood windows. 15 gauge stainless steel or galvanized finish nails. 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 only caulk butt joints on cedar siding if previously caulked.

Dap alex plus 12 pack 10 1 oz white paintable latex caulk. Fiber cement boards are caulked only when there is no metal flashing behind them. Big stretch acrylic latex caulking sealant by sashco. Avoid last minute shopping trips by having all your materials ready ahead of time.

You ll also need siding gauges a fiber cement circular saw blade a siding nailer and a 15 gauge trim nailer. 1 i chose this caulk because it has 25 flexibility compared to silicone based caulk. 2 house built before 2008 so has no flashing okay to caulk. Some manufacturers do not require the metal flashing therefore we caulk the butt joint to keep the pieces together and also prevent moisture.

The following information is adapted expanded a bit from certainteed corporations installation instructions for the company s fiber cement siding products as this is the most comprehensive guide we could find for caulking clearance instructions when installing fiber cement siding.