Gaps Between Hardi Plank Siding

Hardie boards should be joined in moderate contact.

Gaps between hardi plank siding. 1 8 there should be a gap between dissimilar materials. Joining hardie boards together is actually very easy but there are a number of ways that contractors get it wrong. Gap between the siding and trim. The bottom of the siding should be kept even with the bottom of the trim or if desired the trim may extend below the bottom of the siding.

James hardie siding is 12 feet long which means that siding on your longer walls will need to join together. James hardie s seal of approval indicates products recommended for use by james hardie building products circular saw with dust collector circular saw blade with carbide tipped teeth framing requirements. Or directly to minimum 7 16 thick. Flashing installed incorrectly or siding installed without the proper gap between the siding and flashing will both result in water damage and a voided warranty.

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. Joint flashing butt joint horizontal lap treatment june 2014 james hardie does not. Look for the words permanent flexibility or permanently flexible written on the label. When installing the first course make.

Look for the words permanent flexibility or permanently flexible written on the label. This technical bulletin is an explanation supporting the announcement made by james hardie on september 8th 2008 withdrawing its recommendation on the use of caulk at field butt joints for hardieplank lap siding. This is a common mistake and so easy to avid. Hardiplank lap siding can be installed over braced wood or steel studs spaced a maximum of 24 o c.

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. 4 42 dissimilar materials. James hardie also does not recommend applying caulk to the horizontal overlap between siding planks see figure 2. 12 hardiplank james hardie warranty claims information tel.

James hardie recommends the use of caulks and sealants that remain permanently flexible. Remember that most hardie siding problems are caused by improper installation. James hardie recommends the use of caulks and sealants that remain permanently flexible. Fiber cement should be separated from other materials such as brick stone wood and metal.

Run the siding to the hardietrim board leaving a 1 8 in.