Siding Joint Flashing

H jointer covers james hardie recommends 6 inch 152 4 mm wide joint flashing that overlaps the course below by 1 inch 25 4 mm.

Siding joint flashing.

The caulk has failed and water can find its way behind the siding. Vertical and plywood siding butt joint details avoid horizontal butt joints in vertical siding. Some local building codes may require different size flashing. The product is a proprietary plastic 20 year uv rated sheet 4 ml thick that is basically a six by twelve post it note.

Pre cut for quick and easy installation. With plywood sidings use a z flashing at horizontal joints to shed water to the outside see figure 1 13 at above left. Jointflash is a safe and economical solution for flashing both fiber cement and wood lap siding. Bear skin is a durable non corrosive flashing material used to prevent water and wind driven rain from infiltrating the butt joints of lap siding.

The easy to use joint flashing sheet that will change the way siding is installed. The following series of pictures will detail how to make a simple flashing that can be slid up behind the joint. Coating paint means no reflective flashback as found using regular metal flashing. Coating eliminates any reaction with fiber cement.

How to flash siding butt joints after the siding is installed. Joint flashing material must be durable waterproof material that does not react with cement based products. 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. The backflash product is used for the protection of moisture intrusion.

Bearskin joint flashing is a plastic sheet for use as a joint flashing behind every butt joint in the siding. The appleton supply aluminum seam backer plate is used to flash behind fiber cement and smartside siding. The user friendly polyethylene flashing system is perfect for both residential and commercial siding applications. Depending on your reveal of your siding the flashing length will be inch less than the reveal.

Where a butt joint is necessary use a scarf joint sloped down toward the building s exterior. Each sheet is pre cut with a stick it adhesive for the fastest application available. This has proven problematic over time as caulking the joint results in unsightly surface appearances due to the different textures as well as resulted in failure of the caulk joint and associated ongoing maintenance. 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.

Product overview 6 in.