Caulking Cement Siding

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

Caulking cement siding.

James hardie believes it is good building practice to seal the joints to prevent moisture such as wind driven rain and snow from penetrating the wall cavity. Caulking around windows doors eaves and trim edges gives added insurance that leaks will not occur. Flashing acts as a waterproofing layer for this type of siding and caulking will prevent the flashing from doing its job. What you want to use is a silicone caulk because it s the most permanent one.

Do not caulk fiber cement siding butt joints edges. 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. Bottom of siding boards should not be caulked. Big stretch acrylic latex caulking sealant by sashco.

Butt end joints should be installed with factory sealed or factory prefinished ends butted together in moderate contact. 2 house built before 2008 so has no flashing okay to caulk. 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. But you are correct that it is very difficult to paint.

So what i would tell you to do is to use a colored caulk to choose the caulk in the color of the siding. 1 i chose this caulk because it has 25 flexibility compared to silicone based caulk. While paint does tend to somewhat glue these pieces together caulking them is never advised and can cause permanent damage. Water is meant to exit through the bottom of each board.

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. That is why we are showing you some other products for various surfaces along with our top pick. For pricing and availability. Siding caulk.

Also avoid caulking tongue and groove siding boards together. For pricing and availability. It is never acceptable to leave a gap of any size at a butt end joint. Ge silicone 1 10 1 oz clear silicone caulk.

It s got good adhesion and expands and contracts.