Crack Repair + Crawl Seal, Montavilla
Water arriving through a single crack under real pressure, plus a crawl space at 74% humidity feeding the whole house.
Location
Montavilla, Portland
Service
Crack Repair + Crawl Space Encapsulation
Duration
4 days
Completed
June 11, 2025
The situation
Once the ground was saturated, water did not seep through the uphill wall, it sprayed, through one vertical crack. Separately, the crawl space under the rear extension sat at 74% humidity with visible growth on the joists.
What we did
Structural epoxy (opens in a new tab) injection sealed the crack full-depth, confirmed by resin at the exterior face. The crawl space was cleaned out, treated, sealed with a 20-mil vapor barrier (opens in a new tab) and put on a dehumidifier, both jobs scheduled in a single mobilization.
The outcome
Inflow at the wall dropped to zero and has stayed there through two wet seasons. Crawl humidity holds at 48%, and the owners report the rear rooms no longer smell damp, which is the stack effect (opens in a new tab) working in the other direction.
Combining basement crack repair with crawl space encapsulation in one visit is common here. The nine signs list is a good way to check whether your house has both.
By the numbers
| Metric | Result |
|---|---|
| Cracks injected | 1 |
| Crawl area sealed | 620 sq ft |
| Crawl humidity | 74% to 48% |
| Mobilizations | 1 |
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