Foundation Repair & Basement Waterproofing Services in Chattanooga, TN

Foundation Repair in Chattanooga

Settling foundations are common across Chattanooga’s hillside neighborhoods and neighborhoods built on fill soils near the river. Olshan uses proven pier systems and underpinning methods to stabilize and, where possible, lift settling foundations back toward their original position. If your home is showing cracks in brick veneer, stair-step cracking in mortar joints, or uneven floors, a structural assessment from Olshan is the right first step.

Our Approach: Cable Lock ST+ vs. Helical Piers

If you have been researching foundation repair, you may have come across contractors recommending helical piers. Helical piers are a legitimate repair method, and Olshan can install them when the situation calls for it. But in most residential foundation repair scenarios, they are not the most practical choice for the homeowner. Installation requires heavy equipment that can damage landscaping and hardscaping, the process is disruptive, and the cost is significantly higher than comparable alternatives.

Olshan’s primary pier solution is the Cable Lock ST+ system – a patented, push-pier design engineered specifically for residential foundation stabilization. It is installed with minimal excavation, causes far less disruption to the yard and surrounding areas, and delivers the same goal: a stable, supported foundation. The Cable Lock ST+ is backed by Olshan’s available warranty, so you are not just getting a repair – you are getting long-term protection and accountability. Our evaluators will recommend the right system for your home’s specific conditions, and we will explain why.

Crawl Space Repair and Encapsulation

A large portion of Chattanooga’s housing stock – particularly homes built before 1980 – sits on crawl spaces. Left unprotected, crawl spaces in this region become collection points for moisture, mold, and wood rot due to the humidity that rolls through the Tennessee Valley from spring through fall. Olshan’s crawl space encapsulation system addresses this at every level:

• Heavy-duty vapor barriers installed across the ground and up the walls to block ground moisture
• Crawl space dehumidifiers sized for the actual cubic footage of your space
• Antimicrobial wood sealant coating applied to joists and beams to stop mold at the surface
• Sump pumps and interior drainage channels for spaces with active water intrusion

If your crawl space has standing water, visible mold, or insulation hanging from the floor joists, it is already affecting your indoor air quality.

Roughly 40 percent of the air inside a crawl space home migrates upward into the living areas.

Olshan’s encapsulation process transforms an open, vented crawl space into a clean, controlled environment.

Subfloor Repair and Replacement

Older Chattanooga homes built in neighborhoods like Ridgedale, Avondale, and the North Shore often have wood subfloor systems that have seen decades of humidity exposure. When the crawl space moisture problem goes unaddressed long enough, the floor joists, rim joists, and subfloor decking begin to rot – and eventually the floor above becomes spongy, sagging, or structurally unsafe.

Olshan’s crews perform complete subfloor rebuilds: removing compromised lumber, sistering or replacing floor joists, installing new subfloor decking, and treating the new structure before encapsulating the crawl space to prevent the problem from returning. If your floors have soft spots or bounce noticeably when you walk, this service is worth evaluating before the damage spreads further.

Basement Waterproofing to End Leaky Basements

Chattanooga’s annual rainfall averages around 54 inches per year – well above the national average – and the area’s ridge-and-valley topography means water moves aggressively across and through sloped lots. Homes with basements in East Chattanooga, Hixson, and along the ridges above the city frequently deal with water intrusion through wall cracks, floor cracks, and around window wells after heavy rain events.

Olshan installs basement waterproofing systems designed to intercept water before it pools:

• Interior drainage systems along the perimeter footing that direct water to a sump
• Sump pump installation with battery backup options for storm events
• Exterior wall drainage where site conditions allow

Basement waterproofing is not just about keeping the space dry. Persistent moisture accelerates structural deterioration, promotes mold growth, and reduces the usable life of mechanical systems located in the basement. Addressing the source of water entry protects the whole home.

Basement Wall Repair – Solves Cracks, Bowing, and Structural Movement

Basement walls that are bowing inward, showing horizontal cracking, or separating at the corners are under active lateral pressure from the soil outside. This is particularly common in Chattanooga homes where basement walls are bordered by heavy clay soils that retain moisture and expand against the wall. Left unaddressed, bowing walls can progress to the point where they become a collapse risk.

Olshan stabilizes and repairs damaged basement walls using several methods depending on severity:

• Wall anchors driven into stable soil outside and tensioned against the wall – effective for walls with room to work on the exterior
• Adjustable wall braces that run floor-to-ceiling and can be incrementally tightened over time to gradually straighten the wall
• Carbon fiber straps bonded to the wall surface to prevent further inward movement – a low-profile solution with minimal footprint
• Epoxy crack injection for non-structural cracks that are allowing water entry

Learn more.

Exterior Water Management (Superior Drainage Alternative)

Sometimes the most effective fix starts outside the home. For Chattanooga properties with grading problems, inadequate drainage, or downspout discharge that pools near the foundation, Olshan designs and installs exterior water management systems that redirect surface water away before it reaches the structure. These range from corrected grading and extended downspout runs to French drain systems and channel drainage on heavily sloped lots. Exterior water management is often paired with interior waterproofing for a comprehensive solution.

Commercial Foundation Repair – Including Houses of Worship

Olshan serves commercial property owners throughout the Chattanooga area, including a significant number of churches and historic religious buildings. Many of Chattanooga’s oldest churches – built on stone foundations or unreinforced masonry in the late 1800s and early 1900s – are now showing the effects of soil movement, moisture intrusion, and decades of deferred maintenance. Olshan understands the importance of minimal operational disruption for commercial clients and the preservation priorities that come with historic structures. We provide commercial evaluations and custom repair plans at no charge.