Edmonds crawl spaces take in moist marine air for much of the year, and homes in low spots near the waterfront can also see surface water. Crawl space mold removal cleans the framing, replaces ruined insulation and ground cover, and deals with the moisture behind it. Call the number on this page to be connected with a local mold remediation company in Edmonds.
Local conditions in Edmonds
Edmonds sits on Puget Sound in southwest Snohomish County, about 14 miles north of Seattle, with its downtown in a valley locals call the bowl and a seawall and marina along the waterfront. On December 27, 2022, king tides pushed waves over the Edmonds seawall, put about a foot and a half of water over the marina area and closed Dayton Street between SR 104 and Railroad Avenue, with water one to two feet deep in places. Most homes are well above that, but houses on the slopes around the bowl often deal with groundwater moving downhill, and every Edmonds crawl space draws in humid air off the water from fall through spring.
Clean it or replace it?
| Material | Usual approach | Why |
|---|---|---|
| Solid joists and beams | Clean and dry | Surface growth on sound lumber can be scrubbed, sanded or blasted off |
| Plywood or OSB subfloor | Clean if firm, replace if soft or delaminated | Swollen or rotted panels lose strength and hold moisture |
| Fiberglass insulation | Remove | EPA says porous materials may need to be discarded once moldy |
| Plastic ground cover | Replace | Old sheeting is usually torn, dirty and under debris |
| Duct insulation | Inspect, often replace | EPA warns a contaminated system can spread spores |
Signs to watch for
- A musty smell near floor registers or in rooms over the crawl space
- White, gray or black growth on the edges of joists
- Insulation batts that have fallen or feel damp
- Standing water or mud on top of the plastic
- Rust on nails and metal hangers under the floor
Timing and seasonal notes
Crawl spaces here are wettest from October through April, so that is when growth spreads and smells are strongest. Late spring and summer are the easiest time to dry framing before new insulation goes in, but do not wait months if insulation is falling or water is standing. If repairs go beyond cleaning, the City of Edmonds Building Division issues permits. Renters should know the city's code enforcement says it does not get involved in tenant-landlord disputes, and the Snohomish County Health Department does not investigate mold in private homes; written notice to the landlord comes first.
Crawl Space Mold Removal questions in Edmonds
Does the insulation under my floor have to come out?
Should I close the crawl space vents in winter?
I rent. Who is responsible for mold under the house?
Who can answer health questions about mold in my house?
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