Caulking Hardie Board And Batten Siding

Begin caulking on a dry day when you don t expect rain as rain and damp conditions can interfere with the curing process.

Caulking hardie board and batten siding.

Combine with hardietrim boards for a rustic board and batten look. Ensure that the board and batten siding is also dry. Works well with farmhouse style or modern homes. Do not use stains or oil based alkyd paints on james hardie products.

2 house built before 2008 so has no flashing okay to caulk. 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. Obviously if using hardi board material allow the system to expand and contract is much less important. A high quality paintable caulk is recommended.

This from installation instructions. Re applying caulking when it has begun to show signs of wear can help keep moisture from getting into the wall cavity. For best results use caulks that comply with either astm c 834 or astm c 920. Traditionally board and batten siding starts with wide vertical planks boards which are then joined together by thin vertical strips battens to cover the seams.

One of the main concepts of board and batten siding is to allow the boards to move under the battens and caulk would limit the ability of the system to expand and contract. 1 i chose this caulk because it has 25 flexibility compared to silicone based caulk. Re siding your house with hardiepanel vertical siding or combining it with hardieplank lap siding is sure to add visual punch to your design. For additional information on finishing james hardie products download technical bulletin 22 from here.

Homesteaders and farmers would use sawmills to cut the long boards and the battens were put in place to make the structure as airtight as possible. Caulking around windows doors eaves and trim edges gives added insurance that leaks will not occur. Wherever hardie siding meets a trim board the company recommends you leave a 1 8 gap between the siding and the trim and apply a 3 8 bead of approved caulking to protect and seal the edge of the siding.