Air Gap Siding

Rainscreen between flat to wall siding and the water resistive barrier as a best practice.

Air gap siding.

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. The r 0 87 value for the first value in this air r value table subsection. With the air gap we get drainage and the control of hydrostatic pressure. Click here to see an animation of the rain screen principle and other links to more details of this critical air space that helps walls to stay dry throughout canada.

The air space between siding and sheathing should also allow humid air to escape. Back vent fiber cement siding to prevent swelling reduce maintenance and extend its life. James hardie recommends that you consult with your design professional if you have questions regarding exterior wall drainage on your single family project. Lightweight 50ft rolls of corrugated lath strip create a rainscreen air gap in both horizontal and vertical siding applications.

An air gap prevents hydrostatic pressure in the wall assembly lets gravity drain liquid moisture and water vapor to exit at ventilated terminations. 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. Synthetic stucco photograph 8. Ventilation air follows exactly the opposite path.

An air gap between the siding and sheathing. Individual buildings all exterior cladding products including hard siding. Common siding installation mistakes to avoid. Purlins at a 45 degree angle still provide sufficient support for installation of the metal roof panels.

An air gap between the siding and. Most siding in canada is installed with an air space between the siding and the wall itself. A 3 8 inch air gap i e. That air space is a key element of building what we call a rain screen wall.

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.