Hardie Siding But Joints

Joint covers are primed on the outside for easy painting and coated on the inside with an epoxy backer to.

Hardie siding but joints. It s best to stagger the joints in each successive course to avoid noticeable patterns. 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. 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. Hardiplank lap siding field butt joint flashing detail.

How to flash siding butt joints after the siding is installed 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. 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. Hardie boards should be joined in moderate contact. Butt joints in adjacent courses should be spaced apart by at least two stud bays for 16 inch o c.

A gap of up to 1 8 and caulked at the joint was an option in 2001 edition of the james hardie installation manual as shown below. Flashing under field butt joints is necessary to keep water and weather away jharrison john harrison cmi june 19 2013 11 45pm 16. I think personally with the different methods of install on this product from. 152 4 mm wide 1 in.

Coating eliminates any reaction with fiber cement. Joining hardie boards together is actually very easy but there are a number of ways that contractors get it wrong. James hardie also does not recommend applying caulk to the horizontal overlap between siding planks see figure 2. Framing or one bay for 24 inch o c.

The joint covers protect the butt joint where two siding planks meet and provide an expansion joint to help prevent siding buckling. James hardie recommends the use of caulks and sealants that remain permanently flexible. A wraparound lower lip hooks the siding and requires one nail to hold it in place. Pre cut for quick and easy installation.

Hardiplank lap siding must be installed correctly to perform properly. 25 4 mm on overlap no caulk figure 1. Coating paint means no reflective flashback as found using regular metal flashing.