Rainscreen Requirements in Building Code

Add to TwitterOn January 1st of this year, the state of Oregon began enforcement of Section R703.1.1 of their 2008 Oregon Residential Specialty Code. This section regards the “Exterior Wall Envelope” and requires that a minimum 1/8″ gap be allowed between the weather-resistive barrier and exterior cladding.

The air space accommodates the required drainage plane which, as you well know, will greatly increase the life of the building and the health of its occupants by removing moisture! All contractors in Oregon were to be in compliance with this code by April 1st, 2010.

Section R703.1.1 Exterior Wall Envelope

To promote building durability, the exterior wall envelope shall be installed in a manner that water that enters the assembly can drain to the exterior. The envelope shall consist of an exterior veneer, a water-resistive barrier as required in R703.2, a minimum 1/8 inch (3 mm) space between the water-resistive barrier and the exterior veneer, and integrated flashings as required in R703.8. The required space shall be formed by the use of any non-corrodible furring strip, drainage mat or drainage board. The envelope shall provide proper integration of flashings with the water-resistive barrier, the space provided and the exterior veneer. These components, in conjunction, shall provide a means of draining in water that enters the assembly to the exterior.

Talk to us at Masonry Technology, Inc. and let us help you meet the building code requirements efficiently and affordably.

**This article was published in the Spring 2010 edition of Moisture Matters™, MTI’s quarterly newsletter. If you missed out, contact us (sarah@mtidry.com or 800-879-3348) to receive a copy by email!

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