Rain Screen Behind Hardiplan Lapp Siding

A rainscreen designed to encourage air circulation behind the siding typically includes furring strips applied vertically.

Rain screen behind hardiplan lapp siding.

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. A builder wonders whether he d get the same benefits by applying furring horizontally. Sidings like hardie board lp smartside and natural cedar benefit from a rainscreen air gap between the siding and the housewrap. 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.

To download dwg siding vents cad files click here. Click here for the rainscreen siding ventilation guide. A predictable rainscreen air gap behind fiber cement sidings like hardie plank and hardie shingle adds durability to the exterior. We re using benjamin obdyke home slicker a plastic mesh matrix that spaces siding about 1 4 in.

Off the wall surface. Rainscreen between flat to wall siding and the water resistive barrier as a best practice. 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. An air gap between the siding and sheathing.

James hardie recommends that you consult with your design professional if you have questions regarding. Click here for our complete list of technical drawings. Architectural spec for cav siding vent system section. Click here to learn about oregon residiential specialty code r703 1 requiring a rain screen space behind siding.

Mti s corrugated lath strip creates a capillary break that prevents entrapped water and promotes airflow to dry out the siding and substrate. The devil is in the details in this case the air intake and flow behind the skirt board. 07 46 00. For single family construction james hardie recommends installing a 90 efficient drainage plane or a 3 8 inch air gap i e.