Air Gap Siding
Back vent fiber cement siding to prevent swelling reduce maintenance and extend its life.
Air gap siding. The air space between siding and sheathing should also allow humid air to escape. An air gap between the siding and. Synthetic stucco photograph 8. Most siding in canada is installed with an air space between the siding and the wall itself.
Purlins at a 45 degree angle still provide sufficient support for installation of the metal roof panels. With the air gap we get drainage and the control of hydrostatic pressure. That air space is a key element of building what we call a rain screen wall. James hardie recommends that you consult with your design professional if you have questions regarding exterior wall drainage on your single family project.
The r 0 87 value for the first value in this air r value table subsection. A predictable rainscreen air gap behind fiber cement sidings like james hardie plank and hardie shingle adds durability to the exterior. Common siding installation mistakes to avoid. Individual buildings all exterior cladding products including hard siding.
Providing an air gap between the stucco cladding and the exterior face of the foam sheathing prevents the debacle we got with face sealed exterior insulated finish systems a k a. Lightweight 50ft rolls of corrugated lath strip create a rainscreen air gap in both horizontal and vertical siding applications. Mti s sure cavity and corrugated lath strip create a capillary break that prevents entrapped water and promotes airflow to dry out the siding and substrate. Does not consider internal convection effects does not consider presence absence of reflective barriers does not consider directions of heat flow up or down nor winter summer conditions.
Air gap or air film 3 4 air space insulating properties. Ventilation air follows exactly the opposite path. A 3 8 inch air gap i e. Rainscreen between flat to wall siding and the water resistive barrier as a best practice.
In order for both of these actions to take place when siding is installed correctly there needs to be a continuous space behind siding where water can drain and air can flow. An air gap between the siding and sheathing.