Roseburg Crawl Space Sealed to Stop Mold and Moisture

When a homeowner in Roseburg, OR started noticing a musty smell coming from their vents, they didn’t think much of it. But after weeks of worsening air quality and rising humidity inside the house, especially in the early mornings, they decided it was time to look under the home.

What they found was alarming: visible mold growth on the floor joists and a crawl space that was damp, musty, and full of moisture-laden air. Concerned about their health and the long-term value of their property, they reached out to TerraFirma for a professional crawl space inspection.

The Problem: Moisture and Mold in a Ventilated Crawl Space

Like many homes in Days Creek, this property was built in the early 1980s and featured a vented crawl space with a thin vapor barrier and minimal drainage. Over time, this created the perfect environment for mold and mildew to thrive.

The crawl space had:

• High humidity levels from Southern Oregon’s wet winters
• Standing water pooling in low areas
• Wood rot and mold spreading along floor joists
• Unsealed vents and gaps, allowing in outdoor air and pests

Worse, the moist air was being pulled into the rest of the home via the stack effect, making indoor air quality noticeably worse. Learn more about how moisture enters crawl spaces here.

Our Solution: A Full Crawl Space Encapsulation System

After a thorough inspection by System Design Specialist Emily J., we recommended a comprehensive crawl space encapsulation approach designed to keep the space clean, dry, and energy-efficient.

Here’s the solution TerraFirma installed:

VaporLoc Elite Bundle: A durable, 20-mil liner that completely seals the floor and walls of the crawl space, blocking moisture from the ground.

• MoistureLoc: A key component of the liner system, MoistureLoc is a multi-layer barrier designed to withstand wear and tear from long-term exposure to humidity and foot traffic.

• EverLast Crawl Space Door: We replaced the old, rotted wooden hatch with a new EverLast door, which seals tightly to prevent outdoor air and moisture from entering.

• TripleSafe Sump Pump: This three-pump system offers redundant protection, automatically removing any groundwater that enters the crawl space—even during power outages.

• Drainage System with Drain Tile: A full perimeter of Drain Tile piping was installed to collect and redirect water to the sump pump basin.

Curious about what goes into a crawl space system? Explore our crawl space encapsulation services.

The Result: A Healthier, Energy-Efficient Home

The transformation was significant, and immediate.

Within 24 hours of installation, the moisture readings in the crawl space dropped dramatically. The mold was professionally remediated, and the home began to feel fresher and more comfortable.

Benefits reported by the homeowner:

• Noticeably cleaner air throughout the home
• Lower heating costs, especially in the early mornings
• No more musty odors
• A sealed crawl space that can now serve as a clean storage area

They were also relieved to learn that the new encapsulation would help protect their home’s foundation from long-term moisture-related damage,especially important in regions like Elkton, where winter rains can saturate the soil for weeks at a time.