Gaps Between Hardy Plank Siding

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.

Gaps between hardy plank siding.

1 8 there should be a gap between dissimilar materials. Plank top stud figure 1 3 8 from plank edge leave 1 8 gap between plank and trim then caulk weather resistive barrier plywood or osb sheathing double wall construction single wall construction 16 or 24 on center let in bracing weather resistive barrier fastener 1 4 thick lath strip moderate contact or maximum 1 8 gap. But the siding should never hang below the trim. You have to consider the amount of siding you ll need how long it will take and any additional fees for equipment and materials.

Run the siding to the hardietrim board leaving a 1 8 in. Fiber cement should be separated from other materials such as brick stone wood and metal. When installing the first course make. Fiber cement problems are rare but do happen from time to time.

James hardie recommends the use of caulks and sealants that remain permanently flexible. 4 42 dissimilar materials. 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. H jointers also age differently that finished siding and can become more visible over time.

1 8 gap between siding and trim surrounding windows and doors always if trim boards. For the same reason james hardie does not recommend applying caulk to field butt joints and exposed nailheads on products with colorplus technology. 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. Achieve the specified gap in the horizontal overlap.

Joining hardie boards together is actually very easy but there are a number of ways that contractors get it wrong. Fiber cement is a siding material that was first introduced in the 1980 s as a replacement for asbestos cement wood aluminum and vinyl siding products. Hardie siding problems a k a. Gap between the siding and trim.

Ours developed about 1 4 inches gaps between the boards which needed to be caulked it james hardieplank siding was installed in august of 97 and there is some shrinkage but only 1 8 inch gap or so in some seams 3 and hardieplank is not the only fiber wood cement board siding product with shrinkage questions reported in 2008.