How To Seal Hardie Board Siding Joints

If you have loose hardieplank siding on your home it is important to fix it.

How to seal hardie board siding joints. You need to have the best caulk for hardie siding to help your walls and wooden surfaces to get rid of open cracks and thin spaces between joints. Hardie boards should be joined in moderate contact. Caulking around windows doors eaves and trim edges gives added insurance that leaks will not occur. James hardie recommends butting field joints together in moderate contact to achieve a continuous looking joint.

Joining hardie boards together is actually very easy but there are a number of ways that contractors get it wrong. Improved appearance when installed properly flashing at a field butt joint creates a better looking joint. But here the main problem is people usually don t find the right type of caulk for their works. This has proven problematic over time as caulking the joint results in unsightly surface appearances due to the different textures as well as resulted.

If you use sashco s acrylic latex caulking sealant you can have any interior or exterior as good as new. Joint flashing is recommended for all hardie lap siding now. Loose siding can leave your home unprotected from weather and insects. It is similar to traditional beveled wood lap siding.

Butt joints are a perfect example of poor joint design they re too small to accommodate a bond breaker so the caulk can t stretch properly once applied but they re also too large to simply leave alone. Apparently no one here read the technical bulletin 9 that james hardie released in 2008. Hardieplank is a brand of fiber cement board that is used for exterior siding projects. A lot of moisture from rain snow misdirected sprinklers or exuberant water fights can get in there enough to do some serious and expensive damage.

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. Hardie no longer recommends the caulking of any joint in their lap siding colorplus or primed. Laps will need to be periodically removed and or reapplied to maintain the seal over the life of the building.