Flashing Behind Hardie Board Siding

Remember one of the main hardie siding problems is water damage however it s also one of the easiest to prevent with proper installation.

Flashing behind hardie board siding.

James hardie also does not recommend applying caulk to the horizontal overlap between siding planks see figure 2. Hardiplank lap siding is a fantastic siding material that we ve been using for years on both residential and light commercial building projects. Use to reduce moisture penetration behind the joint where two planks butt together and drain water over the top edge of the last full course of siding. This is a 6 wide piece of weather resistive material to make sure that no water gets through.

Coating eliminates any reaction with fiber cement. Bearskin joint flashing is a plastic sheet for use as a joint flashing behind every butt joint in the siding. Pre cut for quick and easy installation. Joint flashing butt joint horizontal lap treatment june 2014 james hardie does not recommend caulking butt joints or the horizontal overlaps joint flashing 6 in.

During the course of any siding installation it will be necessary to install two pieces of siding against each other in a course. James hardie recommends that a slip sheet joint flashing is installed behind each butt joint in the siding. Failed caulk joint with no flashing behind. Hardiplank lap siding field butt joint treatment.

This is a butt joint and it. Flashing behind butt joints is an effective low maintenance way to comply with building code and help protect against water intrusion. In this first picture we see what a typical siding joint looks like on a home that was sided with cement board siding and there is no flashing behind the butt joints. Water which makes it s way behind the hardie siding should hit the flashing layer.

Quick and easy. The caulk has failed and water can find its way behind the siding. Hardiplank lap siding is a fiber cement siding product that looks like wood clapboards but outperforms it when it comes to weather resistance and finish performance. The product is a proprietary plastic 20 year uv rated sheet 4 ml thick that is basically a six by twelve post it note.

Hardieplank siding with colorplus technology. Each sheet is pre cut with a stick it adhesive for the fastest application available. James hardie recommends 6 inch wide flashing that overlaps the course below by 1 inch.