Heavy-gauge vapor barriers, sealed foundation vents, and a dedicated sump discharge line so your Portland, OR crawl space stops feeding moisture into the floor joists above it.
Portland, OR crawl spaces vary a lot in how they were originally built, and a liner that's correct for one home can be undersized for another depending on foot traffic and storage use. We size thickness to how the space is actually used.
We follow manufacturer specs on liner overlap and seam tape so the barrier actually holds up over time.
Portland, OR crawl space calls get scheduled fast, especially when there's standing water or an active mold smell involved.
No hourly billing — the number we quote is the number on the final invoice.
We measure relative humidity before and after installation to confirm the space is actually staying below the threshold where mold and wood rot take hold.
We scope every Crawl Space Encapsulation job in person before quoting it, since two properties with the same symptom rarely need the same fix.
Extraction equipment includes submersible pumps sized for tight crawl space access points.
Liner thickness is selected based on foot traffic and how the space will be used going forward, not a flat default.
Sealed vents are paired with mechanical dehumidification so the space doesn't just trap humidity instead of venting it.
A crawl space needs its own sump basin and discharge line separate from any basement system, since the two spaces drain differently.
Exposed ductwork inside an unencapsulated crawl space collects condensation, which we address by insulating and sealing ducts while the space is open.
This helps us bring the right liner thickness and dehumidifier size on the first visit.
We take humidity and moisture readings to establish a baseline before recommending a system.
We explain trade-offs between liner thickness options so you can choose what fits your budget and goals.
We re-test humidity after installation to confirm the space is holding at a healthy level before we consider the job done.
"Found out our old vapor barrier had huge gaps at every seam. They redid it properly and sealed the vents too."
— Portland Homeowner
"Wood floors upstairs were starting to cup from crawl space humidity. Encapsulation plus a dehumidifier stopped it before we had to replace flooring."
— Portland Customer
"Access to our crawl space is tight and awkward, but the crew didn't seem bothered by it at all."
— Portland Homeowner
"Humidity reading before was over 80%. After encapsulation it's holding steady in the 50s."
— Portland Customer
A vapor barrier is just the liner on the ground; full encapsulation seals vents, walls, and often adds a dehumidifier for complete moisture control.
Most residential spaces do well with a 12-15 mil liner; spaces used for storage or with foot traffic often need 20 mil for durability.
Some jurisdictions have code requirements around vent sealing, which we'll flag during the inspection if relevant.
If the smell persists after encapsulation, that usually points to a separate moisture source we'd need to investigate.
Yes — we extract existing water first, then proceed with liner and vent sealing once the space is dry enough to work safely.
Spaces with extensive prior water damage or debris may take longer — we'll give you a realistic estimate up front.
We encapsulate crawl spaces throughout Portland and the surrounding Portland, OR service area, including the zip codes listed below.
Zip codes we serve in Portland, OR: 97227 97221 97220 97229 97203 97202 97201 97206 97205 97204 97209 97208 97258 97266 97218 97236 97232 97233 97230 97239 97219 97214 97215 97216 97217 97210 97211 97212 97213 97207 97228 97238 97240 97242 97250 97251 97252 97253 97254 97256 97280 97282 97283 97286 97290 97291 97292 97293 97294 97222 97223 97224 97225 97267
Call now for a free inspection and a flat-rate quote before anything gets worse.
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