Rain Screen Behind Hardiplan Lapp Siding

A predictable rainscreen air gap behind fiber cement sidings like hardie plank and hardie shingle adds durability to the exterior.

Rain screen behind hardiplan lapp siding.

Sidings like hardie board lp smartside and natural cedar benefit from a rainscreen air gap between the siding and the housewrap. In most jurisdictions including alberta a rainscreen system is not required for james hardie lap siding. Corrugated lath strip crea. Layered tar paper and flashings behind the furring strips create what is called a drainage plane which alone would protect the house from water even ifthere were no siding.

It is a much tougher product and easy to install. It is used for its new commercial lap siding panel. The air space behind the shingles allow moisture that soaks in the front of the shingles to dry to the backside as well as the front. We re using benjamin obdyke home slicker a plastic mesh matrix that spaces siding about 1 4 in.

Rainscreen behind hardie panel b amp b hardy plank came out with a new furring strip. My question is why is james hardy requiring these furring strips with their new panel and not their normal lap siding. It kind of seems that they should spec furring strips for both. Tips for durable fiber cement exteriors.

Off the wall surface. To rainscreen or not to rainscreen if you are worried about the hardi product breaking which can happen you might see if you can find lp smartside siding in your area. An air gap between the siding and sheathing. James hardie s installation instructions do not specify a rainscreen for hardieplank on any type of construction.

James hardie recommends that you consult with your design professional if you have questions regarding. Rainscreen between flat to wall siding and the water resistive barrier as a best practice. Detailing a rain screen wall furring strips space the clapboards away from the wall creating a vent space that helps to dry the back of the siding.