California Residential Code – Stucco Drainage
dan_saa
| Posted in Building Code Questions on
I just noticed addition of requirement to 2022 California Residential Code for stucco to have 3/16″ drainage plane in Marine areas. What is strange is that I believe the map under “Figure N1101.7″ is under Chapter 11 of the IRC, which California did not adopt. Does anyone know if California Building Officials are enforcing this?
R703.7.3.2 Moist or marine climates. In the Moist (A) or Marine (C)
climate zones indicated in Figure N1101.7, water-resistive barriers shall
comply with one of the following:
1. In addition to complying with Section R703.7.3.1, a space or drainage
material not less than 3⁄16 inch (5 mm) in depth shall be added
to the exterior side of the water-resistive barrier.
2. In addition to complying with Section R703.7.3.1, Item 2, drainage
on the exterior side of the water-resistive barrier shall have
a drainage efficiency of not less than 90 percent, as measured in
accordance with ASTM E2273 or Annex A2 of ASTM E2925.
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