Climate & Durability

West Coast construction spans marine rain, inland heat, wildfire exposure, seismic risk, salt air, and large regional differences in drying potential. Durable work begins by identifying the exposure that controls the design.

What this section covers

• Wet-climate wall and roof decisions
• Coastal corrosion and salt-air exposure
• Wildfire-resistant exterior assemblies
• Seismic retrofit fundamentals
• Moisture control and mold prevention
• Drainage, flashing, and drying potential
• Energy-efficient and durable envelopes

The first guide, building for rainy climates, explains the four control layers and the transitions where failures often begin. It connects directly to building envelope basics.

Rain, moisture, and coastal guides

• Rainy-climate construction — plan drainage, drying, wet-weather construction, and verification for exposed sites.
• Moisture control in buildings — manage rain, groundwater, air leakage, vapor, plumbing, construction moisture, and maintenance.
• Coastal construction — coordinate salt exposure, corrosion, wind-driven rain, flood context, exterior systems, and recurring care.
• Rainscreen wall systems — design the drained cavity and the wall behind the finish as one assembly.
• Exterior cladding guide — compare finish families after exposure and control-layer requirements are established.

For regional context, continue to the Pacific Northwest construction guide, then confirm current local hazards and adopted requirements for the project jurisdiction.

Climate is a design input

Regional labels are not specifications. A site near the Oregon coast, an inland valley, a mountain snow zone, and a California wildland-urban interface require different priorities. Each guide states its assumptions and directs readers to local code, hazard, and permitting sources.

Safety-critical decisions require qualified design professionals and current local requirements.