Crawl Space Repairs in Washington County, TN

Crawl Space Repair Contractors Serving Washington County, TN

Crawl space foundations are common in homes throughout Washington County, TN—from historic houses in Jonesborough to newer builds on the outskirts of Johnson City. But while crawl spaces were originally designed for ventilation, they often do more harm than good in today’s damp climate. Left untreated, moisture under the house can lead to sagging floors, high humidity, mold growth, and wood rot that threaten the structure of your home.

At '58 Foundations & Waterproofing, we specialize in solving these problems at the source. Whether your crawl space needs structural repairs, moisture control, or full encapsulation, our team delivers trusted results backed by a Life-of-the-Structure Warranty. If you’re looking for a crawl space repair contractor near Washington County, we’re the company homeowners have turned to for over 65 years.

Signs Your Crawl Space Needs Professional Repair

In Washington County, crawl space damage usually reveals itself gradually, often starting with soft, uneven flooring. Homeowners might notice strange odors coming from below the house or worsening allergy symptoms during rainy months. Over time, wood joists begin to sag, insulation becomes saturated and falls, and musty air starts to creep into living spaces. Even energy bills can increase, as humidity from the crawl space affects the home’s comfort and efficiency.

In areas like Telford and throughout the hills surrounding Johnson City, groundwater and runoff are common issues. If left unaddressed, excess moisture can create ideal conditions for mold, mildew, and pests to thrive beneath your home, causing long-term damage that can cost far more to fix later.

Crawl Space Repair Services in Washington County, TN

Our crawl space repair contractors begin with a full inspection to determine how water and humidity are entering, what structural damage has occurred, and which solutions are needed to stop the cycle. Every home is different, especially across the varied soil and moisture conditions in Washington County. That’s why we tailor each repair plan to your exact layout, using proven systems that address both immediate damage and long-term risks.

Our Washington County crawl space services include:

• Support beam and floor joist repair – When wooden beams and joists begin to rot or sag from moisture exposure, the floors above them become bouncy, uneven, or dangerously soft. We reinforce or replace the damaged wood and use steel supports where needed to restore full stability across your crawl space and living areas.
  
• Crawl space waterproofing systems – We install interior drain channels, sump pumps, and discharge lines designed to move water out of the crawl space before it causes structural harm. This is often the first step in stopping mold, rot, and ongoing foundation problems from worsening over time.
  
• High-performance dehumidifier installation – Moisture doesn't only come from flooding—it lingers in the air. Our commercial-grade dehumidifiers maintain a controlled environment beneath your home, protecting wood, insulation, and indoor air quality year-round.
  
• Mold and mildew remediation – We remove mold colonies at the source and apply professional-grade treatments that prevent regrowth. For homes with long-term moisture problems, this service restores safety and odor control, especially in closed crawl spaces.
  
• Crawl space insulation replacement – Wet or falling insulation drives up energy bills and reduces comfort. We remove old, ineffective materials and install insulation that resists moisture and supports your HVAC system’s performance.
  
• Vent sealing and air gap closure – Open vents and gaps allow humidity, cold air, and pests to enter. We seal off these intrusion points with airtight materials to support full encapsulation or hybrid systems, depending on your crawl space layout.
  

When your home shows signs of sagging floors or trapped moisture, these services aren’t just cosmetic—they’re critical to protecting the structure, comfort, and air quality of your living space. Our solutions are designed for Tennessee’s unique challenges, and every job is backed by the Life-of-the-Structure Warranty that defines '58 Foundations.

Learn more about our crawl space services ›

Crawl Space Encapsulation in Washington County

For homes facing chronic humidity, repeated moisture intrusion, or structural deterioration, crawl space encapsulation offers the most complete protection. Encapsulation seals off the crawl space from outside air, ground vapor, and water intrusion—creating a dry, conditioned space beneath your home.

At '58 Foundations & Waterproofing, our encapsulation system includes a thick vapor barrier across floors and walls, sealed vents, reinforced liners, and a commercial-grade dehumidifier. In areas like Jonesborough and rural parts of Washington County, where groundwater pressure and seasonal humidity are high, this system helps protect your home’s structure and air quality long-term.

Encapsulation may cost more up front, but it eliminates the ongoing expenses and damage risks that come with untreated crawl spaces—making it a smart, permanent investment.

Why Homeowners in Washington County Choose '58 Foundations

We’ve spent over six decades helping homeowners fix crawl space problems the right way. Our crews are trained, certified, and familiar with the unique soil and moisture conditions across Washington County. From homes near the Holston River to the rolling terrain outside Johnson City, we know how to protect your crawl space and strengthen your foundation.

With no high-pressure sales and a Life-of-the-Structure Warranty on our work, we’ve earned the trust of thousands of families throughout East Tennessee.

Schedule Your Free Crawl Space Inspection Today

If you’re noticing signs of crawl space damage—or want a professional opinion before problems get worse—reach out to the team homeowners in Washington County trust most. Whether you need simple repairs or full crawl space encapsulation, we’ll inspect your home, explain the cost of crawl space repair, and deliver a plan that works.

Schedule your free estimate today and take the first step toward a safer, healthier home.

Other Services We Offer in Washington County, TN

Foundation Repair in Washington County, TN

Basement Waterproofing in Washington County, TN