1. Wind-Driven Rain & Building Envelope Penetrations
Inland Western Washington sees steady drizzle, but the Washington Coast faces sustained 50–70 mph Pacific gales where rain travels horizontally. On homes in Grays Harbor (Ocean Shores, Westport, Aberdeen) and Pacific County (Long Beach, Ilwaco, Raymond), standard residential caulking is quickly overwhelmed.
What We Inspect on Coastal Exteriors:
- Window Head Flashing & Z-Bar Detailing: Coastal wind forces water up under window trim. Proper metal drip caps with taped weather-resistive barriers (WRBs) are essential.
- Roof Shingle Wind Ratings & Fastener Spacing: Coastal codes require high-wind shingles nailed with six nails per shingle rather than the standard inland four.
- Siding Butt Joints & Corner Caps: Fiber cement and cedar lap siding must maintain proper expansion gaps and back-flashing to prevent moisture entrapment behind the cladding.
2. Salt-Air Atmospheric Corrosion
Within 5 to 10 miles of the Pacific Ocean, salt aerosols settle on every exposed metal surface. Salt is hygroscopic—it attracts atmospheric moisture and forms an electrolyte solution that speeds galvanic corrosion.
Components Most Vulnerable to Salt Corrosion:
- Heat Pump Outdoor Condensers: Standard aluminum heat pump fins corrode into white powder within 3 to 5 years unless ordered with coastal epoxy coatings (like BlueFin or Phenolic coatings).
- Exterior Electrical Service Panels & Masts: We inspect meter bases and weatherheads for internal rust and copper terminal pitting that could cause electrical fires or arc faults.
- Deck Hardware & Framing Connectors: Standard galvanized Simpson joist hangers and ledger bolts rust rapidly in marine air. Marine-grade 316 stainless steel is the golden standard.
3. Coastal Crawl Spaces: High Water Tables & Sandy Loam
Communities on the Long Beach Peninsula and Ocean Shores spit were built on sand dunes and low coastal plains. In winter, the saltwater and freshwater tables rise together.
During an inspection, it is common to find several inches of standing water in an improperly detailed coastal crawl space. If vapor barriers are torn or missing, thousands of gallons of moisture evaporate into the sub-floor structure every month, creating conditions ripe for wood-decay fungi, dry rot, and wood-boring beetles.
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4. Septic Systems in Coastal Sandy Soils
In Pacific County and unincorporated Grays Harbor, sandy soils create unique challenges for drain fields. Because sand filters water very quickly, advanced pressurized mound systems or sand filter treatment units are commonly required by local health departments to prevent untreated wastewater from reaching coastal aquifers.
We inspect the accessible components of the septic tank, verify alarm panels on lift pumps, and recommend specialized transfer testing when purchasing coastal rural properties.
5. Second Homes & Vacation Rentals: The Hidden Damage
Many coastal homes are short-term rentals or secondary vacation properties. Unlike owner-occupied homes, minor plumbing leaks beneath vanities, water heater pressure valve failures, or minor roof leaks can go unnoticed for entire off-seasons.
Our thermal imaging infrared scanning detects hidden wet insulation inside ceiling cavities and behind bathroom tile before mold spreads unchecked.
Book an Independent Coastal Inspection
Don't buy on the Washington Coast without knowing exactly how the home weathered the last storm season. We provide unbiased, detailed inspection reports across Grays Harbor and Pacific counties.