Flashing Behind Hardie Board Siding

Hardiplank lap siding field butt joint treatment.

Flashing behind hardie board siding.

James hardie recommends 6 inch wide flashing that overlaps the course below by 1 inch. James hardie also does not recommend applying caulk to the horizontal overlap between siding planks see figure 2. Failed caulk joint with no flashing behind. James hardie recommends that a slip sheet joint flashing is installed behind each butt joint in the siding.

Coating eliminates any reaction with fiber cement. Water which makes it s way behind the hardie siding should hit the flashing layer. 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. The caulk has failed and water can find its way behind the siding.

This is a butt joint and it. Quick and easy. Hardiplank lap siding is a fantastic siding material that we ve been using for years on both residential and light commercial building projects. Hardieplank siding with colorplus technology.

During the course of any siding installation it will be necessary to install two pieces of siding against each other in a course. Coating paint means no reflective flashback as found using regular metal flashing. 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. The product is a proprietary plastic 20 year uv rated sheet 4 ml thick that is basically a six by twelve post it note.

Bearskin joint flashing is a plastic sheet for use as a joint flashing behind every butt joint in the 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. Pre cut for quick and easy installation. Most contractors will remember to do this but some of them try to save a buck by cutting squares of building paper for.

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. The flashing keeps water off the sheathing and drains water properly which prevents water damage. This is a 6 wide piece of weather resistive material to make sure that no water gets through.