Rain Screen Behind Hardiplan Lapp Siding

James hardie recommends that you consult with your design professional if you have questions regarding.

Rain screen behind hardiplan lapp siding.

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. Rainscreen between flat to wall siding and the water resistive barrier as a best practice. The devil is in the details in this case the air intake and flow behind the skirt board.

For single family construction james hardie recommends installing a 90 efficient drainage plane or a 3 8 inch air gap i e. It is used for its new commercial lap siding panel. 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. Sidings like hardie board lp smartside and natural cedar benefit from a rainscreen air gap between the siding and the housewrap.

Mti s corrugated lath strip creates a capillary break that prevents entrapped water and promotes airflow to dry out the siding and substrate. It kind of seems that they should spec furring strips for both. 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. In most jurisdictions including alberta a rainscreen system is not required for james hardie lap siding.

Tips for durable fiber cement exteriors. 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. Off the wall surface. It is a much tougher product and easy to install.

My question is why is james hardy requiring these furring strips with their new panel and not their normal lap siding. Corrugated lath strip crea. Rainscreen behind hardie panel b amp b hardy plank came out with a new furring strip.