How To Seal Hardie Board Siding Joints

Hardie plank joints butt joints james hardie siding is 12 feet long which means that siding on your longer walls will need to join together.

How to seal hardie board siding joints.

A common problem with cement board siding products and some other types of horizontal lap siding is that older installation guidelines called for caulking the joint instead of flashing the joint. 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. Hardieplank is a brand of fiber cement board that is used for exterior siding projects. If you use sashco s acrylic latex caulking sealant you can have any interior or exterior as good as new.

Caulking around windows doors eaves and trim edges gives added insurance that leaks will not occur. Apparently no one here read the technical bulletin 9 that james hardie released in 2008. Hardie no longer recommends the caulking of any joint in their lap siding colorplus or primed. It is similar to traditional beveled wood lap siding.

Joint flashing is recommended for all hardie lap siding now. 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. If you have loose hardieplank siding on your home it is important to fix it. Improved appearance when installed properly flashing at a field butt joint creates a better looking joint.

Laps will need to be periodically removed and or reapplied to maintain the seal over the life of the building. But here the main problem is people usually don t find the right type of caulk for their works. Joining hardie boards together is actually very easy but there are a number of ways that contractors get it wrong. 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. James hardie recommends butting field joints together in moderate contact to achieve a continuous looking joint. Deterioration of the caulking in the joint has become a maintenance issue for home owners over time.