CALGreen Section: 5.407.1 Weather protection. Provide a weather-resistant exterior wall and foundation envelope as required by California Building Code Section 1403.2 (Weather Protection) andCalifornia Energy Code Section 150, (Mandatory Features and Devices), manufacturer’s installation instructions, or local ordinance, whichever is more stringent.
Intent:
The intent of this code provision is to provide a weather-resistant exterior wall and foundation envelope as currently required by California Building Codes. This measure is to spotlight those existing code provisions and increase the integrity and longevity of the structure.
Existing Law or Regulation:
Currently this code provision is regulated by California Building Code Section 1403.2 (Weather Protection) and California Energy Code Section 150, (Mandatory Features and Devices for low-rise residential) and some local ordinances.
Compliance Method:
Design Team: Determine local conditions that may affect the amount of moisture that might penetrate the envelope due to weather, wind-driven rain or exposure to salt spray, etc. For example, the protection measures in Section 150 of the energy code are required for Climate Zones 14 & 16, in the mountains. Design and detail exterior wall systems to reflect local findings, specifying appropriate materials and vapor retardance. Show on the plans and specifications.
Suggestion: Pay particular attention to openings and changes of material in detailing exterior wall systems.
Contractor: Install any exterior wall system in accordance with architectural details and manufacturer’s installation instructions.
Suggestion: Systems like exterior insulation and finish systems, if not installed to manufacturer’s installation instructions, have the potential for moisture penetration and condensation that may lead to mold, structural failure, and increased liability.
Enforcement:
Plan Intake: The reviewer and/or plan checker should review the construction documents to confirm that the exterior wall and foundation envelope meets the California Building Code Section 1403.2 (Weather Protection) and California Energy Code Section 150, (Mandatory Features and Devices for low-rise residential) and/or local ordinances are being met.
On-Site Enforcement: The inspector should review the permit set of plans to verify that the exterior wall and foundation envelope as specified on the approved plans and specifications are installed.
SECTION 5.713 – MATERIAL CONSERVATION AND RESOURCE EFFICIENCY
CALGreen Section: 5.713.7.1 Weather protection. Provide a weather-resistant exterior wall and foundation envelope as required by California Building Code Section 1403.2 (Weather Protection) andCalifornia Energy Code Section 150, (Mandatory Features and Devices), manufacturer’s installation instructions, or local ordinance, whichever is more stringent.
Intent:
CBSC adopted this section from the new construction section to provide clarity to the code user requiring weather protection to additions and alterations, preventing damage to the structure and mold contamination. The section refers to regulations already in place.
Compliance and Enforcement: See § 5.407.1 of this guide
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