Rain Screen Behind Hardiplan Lapp Siding

Rainscreen behind hardie panel b amp b hardy plank came out with a new furring strip.

Rain screen behind hardiplan lapp siding.

For single family construction james hardie recommends installing a 90 efficient drainage plane or a 3 8 inch air gap i e. It is a much tougher product and easy to install. James hardie recommends that you consult with your design professional if you have questions regarding. It is used for its new commercial lap siding panel.

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. Tips for durable fiber cement exteriors. 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. 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. Corrugated lath strip crea. Mti s corrugated lath strip creates a capillary break that prevents entrapped water and promotes airflow to dry out the siding and substrate.

In most jurisdictions including alberta a rainscreen system is not required for james hardie lap siding. 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. We re using benjamin obdyke home slicker a plastic mesh matrix that spaces siding about 1 4 in. 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.

Rainscreen between flat to wall siding and the water resistive barrier as a best practice. Off the wall surface. A predictable rainscreen air gap behind fiber cement sidings like hardie plank and hardie shingle adds durability to the exterior.