Foundation Repair FAQ — Cobb County Homeowners' Questions Answered
Are you a foundation repair contractor, or how does this referral service work?
We are not a contractor. Marietta Foundation Repair is a disclosed lead-referral service operated by Stratum Relay LLC. We connect Cobb County homeowners with one vetted, licensed, and insured local foundation repair partner. The contractor we connect you with performs all physical work. We do not perform the work — we do the vetting.
Our role is straightforward: when you call (678) 329-9460 or submit a request, we pass your information to the vetted local partner we have screened for licensing, insurance, and workmanship standards in the Cobb County market. That partner contacts you directly to schedule a free inspection.
The referral is free to you. The contractor we connect you with pays the referral fee — not the homeowner. You pay nothing to use this service; you only pay the contractor if you decide to move forward with repair after reviewing their written estimate.
If you want to understand how to evaluate any contractor you speak with — including ours — see our guide to how to vet a foundation contractor in Cobb County before you commit to any work.
How much does foundation repair cost in Cobb County?
Foundation repair in Cobb County typically ranges from $3,500 to $25,000 depending on the problem type, severity, and repair method. Crack injection starts around $300. Helical or push piers run $1,400 to $3,500 per pier. The only way to get an accurate number is a site inspection — which is free.
Costs vary widely because foundation problems are not one-size-fits-all. A single hairline crack injected with epoxy or polyurethane may cost $300 to $3,000. A settling home that needs eight helical piers at $1,400 to $3,500 each will land at the higher end of the overall $3,500 to $25,000 range. Use our cost estimator to get a rough range before your inspection.
Other common cost benchmarks in the Marietta area: slab leveling or mudjacking runs $600 to $2,500; crawl space encapsulation typically costs $5,000 to $12,000; bowing wall repair with carbon fiber straps or anchors falls in the $1,750 to $6,000 range; and basement waterproofing generally runs $2,000 to $10,000. These are ranges — site conditions in ZIP codes like 30062 or 30064 affect every quote.
For a full cost breakdown by repair type and neighborhood, see our detailed foundation repair cost guide for Marietta.
- Crack injection: $300 – $3,000
- Helical or push piers: $1,400 – $3,500 per pier
- Slab leveling / mudjacking: $600 – $2,500
- Crawl space encapsulation: $5,000 – $12,000
- Bowing wall (carbon fiber or anchors): $1,750 – $6,000
- Basement waterproofing: $2,000 – $10,000
- Inspection: FREE
What are the warning signs that I need foundation repair?
The most common warning signs in Cobb County homes are stair-step cracks in brick or block, diagonal drywall cracks at door and window corners, doors or windows that stick or no longer close flush, sloping or bouncy floors, gaps at baseboards or trim, and water intrusion in the basement or crawl space.
Stair-step cracking along mortar joints in brick or block is one of the clearest signs of differential settlement — the foundation is moving unevenly under different sections of the home. Diagonal cracks running from the corners of door frames or window openings at roughly 45 degrees indicate the wall is racking, a direct result of shifting footings. See the full list on our warning signs page.
Sloping or bouncy floors in a pier-and-beam or crawl space home point to deteriorating girders, posts, or settlement of the piers themselves. In slab homes, a noticeable tilt across a room — measurable with a simple level — indicates the slab has heaved or sunk in a localized area. Even a slope of one inch over ten feet can stress interior walls enough to crack drywall.
Horizontal cracks in a block or poured-concrete basement wall are a more urgent signal than vertical or stair-step cracks because they indicate lateral pressure from soil — the wall may be actively bowing. If you see a horizontal crack, schedule a free foundation inspection promptly rather than waiting to see if it grows.
- Stair-step cracks in brick mortar joints
- Diagonal drywall cracks at door and window corners
- Doors or windows sticking or no longer latching
- Sloping, bouncy, or sagging floors
- Gaps appearing at trim, baseboards, or crown molding
- Water seeping into basement or crawl space after rain
- Tilting chimney or exterior steps pulling away from the house
Why do Cobb County foundations have more problems than other parts of Georgia?
Cobb County sits on the Piedmont region's expansive Cecil red clay — a smectite-bearing soil that swells significantly when wet and shrinks 6 to 8 percent seasonally, up to 10 to 15 percent in a hard drought. That repeated expansion and contraction pulls footings apart over years, especially during Atlanta's wet springs and dry late summers.
The Cecil soil series dominates most of Cobb County. It is classified as a smectite clay, meaning its mineral structure absorbs water and physically expands — then releases it and contracts. Metro Atlanta averages more than 50 inches of rain per year, concentrated in spring (March through May). The wet season is followed by a dry spell in August through October when the clay pulls away from footings, leaving them unsupported on one side. That cycle repeats every year. See our full explanation at why foundations crack in Cobb County.
West Cobb — the areas near Kennesaw Mountain, Lake Acworth, and along Sandy Plains Road — adds a layer of complexity because the clay there often overlies saprolite, a deeply weathered granite that has a variable bearing capacity. A footing resting partly on saprolite and partly on clay settles unevenly almost by design. Newer post-tension slab homes built on this profile in the 30144 and 30101 ZIP codes can show cracking even before a decade of service.
The housing stock compounds the soil problem. Post-WWII slab-on-grade brick ranch homes — common along Johnson Ferry Road and Roswell Road corridors — were designed with shallower footings than modern standards require under IRC Section R401. Older footings have less bearing depth to weather the clay's seasonal movement, which is why homes built in the 1950s and 1960s account for a disproportionate share of the foundation calls we receive.
What repair methods are used and how do I know which one my home needs?
The right repair method depends on your foundation type, the problem's cause, and severity. Common methods include helical piers and push piers for settling, epoxy or polyurethane crack injection for cracks, slab leveling for sunken slabs, carbon fiber straps or wall anchors for bowing walls, and drainage or encapsulation for moisture. The free inspection determines which applies.
For homes with settling caused by soil movement or loss of bearing capacity, the vetted local partner we connect you with typically installs helical piers or push piers — steel sections driven or screwed to stable soil below the active clay layer, then connected to a steel bracket that transfers the load. Helical piers can be installed in tight crawl space conditions; push piers are driven hydraulically and work well on heavier slab or basement foundations. Most settling jobs require 3 to 12 piers.
Crack repair depends on whether the crack is active or dormant and whether it is leaking. The contractor we connect you with uses epoxy injection to structurally bond a dormant crack and polyurethane foam injection to seal an actively leaking crack while remaining flexible. See our comparison at /epoxy-vs-polyurethane-crack-injection. Bowing walls are addressed with carbon fiber reinforcing straps anchored to floor joists or with helical tiebacks driven into stable soil — method choice depends on how far the wall has deflected.
Crawl space problems — sagging floors, rot-prone posts, moisture intrusion — are addressed through a combination of structural repair (replacing girders or posts) and moisture control (vapor barriers, drainage, or full encapsulation). Basement moisture that enters through cracks or hydrostatic pressure through the floor is addressed through interior drainage systems and sump pumps. The free inspection is the only way to match the right method to your specific conditions.
Is the inspection really free, and what happens after I schedule one?
Yes — the inspection is completely free, with no obligation. When you call (678) 329-9460 or submit a request online, we connect you with the vetted local partner in Cobb County. They visit your home, assess the foundation, and provide a written estimate. You decide whether to proceed. There is no pressure and no cost for the inspection itself.
The inspection is performed by the licensed contractor we connect you with, not by us. During the visit, the contractor we connect you with evaluates the exterior foundation, checks the interior for wall cracks and floor slope, and inspects the crawl space or basement where accessible. They measure crack widths, check for water intrusion, and document what they find. You receive a written scope of work and itemized cost estimate before any commitment is made.
Most inspections in the Marietta area are scheduled within a few business days. Urgent situations — an active horizontal crack, visible wall bowing, or flooding — are typically prioritized. If you are dealing with an emergency, call (678) 329-9460 directly rather than submitting a web form so we can route you to the partner as quickly as possible.
After the inspection, you are under no obligation to use the contractor we introduced. You are free to get additional quotes. We encourage homeowners to read our guide on how to vet a foundation contractor in Cobb County so you can evaluate any estimate you receive — including the one from the partner we connect you with.
Frequently asked questions
What do stair-step cracks in my brick mean — are they serious?
Stair-step cracks running along mortar joints in brick or concrete block indicate differential settlement — one section of the foundation has moved more than another. A narrow stair-step crack (under 1/4 inch) is often stable, but a widening or offset crack where bricks shift out of plane signals active movement that warrants a free inspection soon.
Are horizontal cracks in my basement wall an emergency?
Horizontal cracks in a block or poured-concrete basement wall are more urgent than other crack types because they indicate lateral soil pressure that may be bowing the wall inward. A wall deflection greater than 2 inches is often beyond carbon fiber repair and may require helical tiebacks or partial wall replacement. Do not wait — schedule an inspection promptly.
What is the difference between helical piers and push piers, and which do I need?
Helical piers are screwed into the ground like a large bolt and work in almost any soil condition and tight spaces. Push piers are hydraulically driven using the home's weight as resistance and are best suited to heavier structures on slab or basement foundations. The choice depends on your foundation type, load, and site access — the contractor we connect you with determines the right fit during the free inspection. Both methods run $1,400 to $3,500 per pier installed.
Does homeowner's insurance cover foundation repair in Georgia?
Standard homeowner's policies in Georgia almost never cover foundation settlement caused by soil movement, shrinkage, or poor compaction — those are classified as earth movement exclusions. Coverage may apply if a sudden, accidental event (like a ruptured water line under the slab) caused the damage. Review your policy's earth movement and exclusion clauses, and see our overview at /foundation-repair-insurance-georgia.
Is financing available for foundation repair?
Yes. The contractor we connect you with typically offers financing options that allow you to spread a $3,500 to $25,000 repair across monthly payments rather than paying the full amount upfront. Terms vary by lender and creditworthiness. Ask about financing during the free inspection so you have all options in front of you when reviewing the written estimate.
What warranty does foundation repair come with?
The vetted local partner we connect you with provides a written warranty on their structural work — typically covering the pier installation or crack repair for a defined period. Warranty scope, duration, and transferability vary by repair type and contractor. Ask for the warranty in writing before signing any contract. See our explainer at /foundation-repair-warranty-explained for what to look for.
How long does foundation repair take to complete?
A helical or push pier job on a Marietta-area home typically takes one to three days depending on pier count and access. Crack injection is usually completed in a few hours. Crawl space encapsulation with drainage can take two to four days. Basement waterproofing with an interior drain system generally takes one to three days. The contractor we connect you with will give you a project timeline in the written estimate.
Do you serve all of Cobb County, including Kennesaw, Acworth, and Powder Springs?
Yes. Our service area covers the full Cobb County and NW Atlanta metro footprint: Marietta (30060, 30062, 30064, 30066, 30067, 30068), East Cobb, Smyrna (30080, 30082), Kennesaw (30144, 30152), Acworth (30101), and Powder Springs (30127). Call (678) 329-9460 to confirm coverage for your specific address.
What is crawl space encapsulation and do I need it?
Crawl space encapsulation seals the crawl space with a heavy-duty vapor barrier on the floor and walls, often combined with a drainage system and dehumidifier, to block moisture from entering the structure. In Cobb County's humid climate, an unencapsulated crawl space can lead to wood rot, mold, and sagging floors over time. Encapsulation typically runs $5,000 to $12,000 depending on size and drainage needs.
Can a cracked foundation be a dealbreaker when selling a home in Marietta?
Foundation issues disclosed on a Georgia Seller's Disclosure form can reduce buyer offers or trigger repair contingencies. A professionally repaired foundation with a transferable warranty is far more attractive to buyers — and their lenders — than an unrepaired one. Getting a free inspection and written repair scope before listing gives you accurate information to present to buyers.
What is the difference between basement waterproofing and crawl space encapsulation?
Basement waterproofing addresses water intrusion in below-grade finished or unfinished basement spaces — typically through interior drain tile, sump pumps, and wall sealants — and runs $2,000 to $10,000. Crawl space encapsulation applies to the unfinished low-clearance space under a pier-and-beam or crawl-foundation home, sealing ground moisture before it affects floor framing, and costs $5,000 to $12,000. Both are moisture control strategies but for structurally different spaces.
What happens if I ignore foundation cracks and do nothing?
Small cracks in Cobb County's expansive Cecil clay rarely stay small. A $300 crack left unaddressed can allow water infiltration that weakens the surrounding concrete, widens the crack through freeze-thaw and seasonal clay movement, and — over several years — creates conditions requiring $12,000 or more in structural repair. Early intervention is almost always less expensive than deferred repair.