Frequently Asked Questions (FAQs)
Crawl Spaces
A wet crawl space is usually caused by poor drainage, high humidity, plumbing leaks, groundwater intrusion, or open vents that allow moist air to enter. Over time, moisture leads to mold, wood rot, and structural damage. A professional crawl space inspection identifies the exact cause so it can be repaired permanently.
Yes. Crawl space mold releases airborne spores that can rise into the home through the “stack effect,” causing allergies, asthma symptoms, and musty odors. Mold is a sign of excess moisture and should be addressed with encapsulation, a dehumidifier, and proper drainage.
Common warning signs include sagging floors, high humidity, standing water, mold, wet insulation, wood rot, condensation on HVAC ducts, and pest activity. If you see any of these, repairs should be made quickly to prevent structural deterioration.
Crawl space repair typically ranges from $2,500–$25,000, depending on whether you need drainage, vapor barrier, structural repairs, or full encapsulation. Homes with severe water issues or wood rot may be on the higher end.
Modern building science recommends keeping crawl space vents closed. Open vents let in moist air, causing mold growth, condensation, and structural issues. Encaping the crawl space seals it and keeps humidity under control.
Sagging floors are usually caused by rotted floor joists, failing support beams, inadequate piers, moisture damage, or termite activity. A structural repair contractor can lift and stabilize the floors permanently.
Yes — pests enter through open vents, gaps, or foundation cracks. Encapsulation seals the crawl space and makes it much harder for rodents, ants, and insects to get in.
Home Foundations
Look for cracks in brick or block walls, uneven floors, sticking windows/doors, stair-step cracks, bowing walls, gaps around trim, and sinking or settling areas of the home. The sooner foundation issues are addressed, the less expensive the repair.
Hairline cracks are often harmless shrinkage cracks. However, horizontal cracks, wide vertical cracks, stair-step cracks, or cracks accompanied by bowing or water intrusion usually indicate structural movement and need professional evaluation.
Settlement typically occurs due to unstable soil, erosion, expansive clay, poor drainage, tree root activity, or improper compaction during construction. Helical piers or push piers are often required to stabilize the home.
The most effective method is installing helical piers or steel push piers beneath the foundation to transfer the home’s weight to stable soil. This lifts, levels, and permanently stabilizes the structure.
Foundation repair can range from $3,000–$40,000+, depending on the number of piers needed, the type of settlement, and whether additional structural repairs are required.
In most cases, standard homeowners insurance does not cover foundation issues unless caused by a sudden event (like a busted pipe). Most settlement is considered normal wear and tear.
Most foundation problems worsen over time, but immediate danger is rare. However, the longer repairs are delayed, the more expensive and severe they become.
Slab Foundations
Slab cracks are usually caused by soil settlement, moisture changes, expansive clay, plumbing leaks, poor construction, or heavy loads. A foundation specialist can determine if the crack is structural.
Yes — hairline shrinkage cracks are common and typically cosmetic. Cracks wider than 1/8 inch or cracks that grow over time may indicate foundation movement.
The most effective repairs include slab piers, foam injection (polyjacking), or mudjacking, depending on the soil conditions and severity of settlement.
Yes — slab piers or polyurethane foam injection can lift and stabilize sinking concrete slabs.
Yes. Poor drainage around a slab allows water to pool around the foundation, causing cracking and settlement. Proper grading and downspout extensions help protect the slab.
Most slab repairs are completed in 1–3 days, depending on the size of the home and number of piers required.
Home Structural Repair
Sagging floors are typically caused by rot, moisture damage, weakened joists, failing beams, termite activity, or inadequate support in the crawl space.
Repairs may include sistering joists, installing steel beams, replacing rotten wood, adding support piers, or using adjustable jacks to level the floor.
Yes. Wood rot weakens support beams and floor joists, compromising the stability of the home. It must be repaired immediately to prevent collapse or costly reconstruction.
Most structural floor repairs range from $3,500–$15,000, depending on the severity of the damage and how much wood must be replaced or reinforced.
Yes — most structural repairs can be completed while you remain in your home, though areas being repaired may be temporarily inaccessible.
Keep your crawl space dry, maintain proper drainage, repair leaks quickly, and schedule regular foundation inspections.
Crawl Space Encapsulation
Encapsulation involves sealing the crawl space with a 20-mil vapor barrier, closing vents, installing a commercial dehumidifier, and adding drainage if needed. This creates a dry, conditioned environment that protects the home’s structure.
Encapsulation eliminates moisture, prevents mold growth, stops odors, improves air quality, reduces energy bills, and protects floor joists from rot or termites. It is the most effective long-term crawl space solution.
Most homes fall between $8,000–$20,000, depending on size, drainage needs, and the condition of the crawl space.
Yes. By controlling humidity below 60%, encapsulation stops mold from growing and prevents moisture from damaging the wood structure.
Yes — a high-capacity crawl space dehumidifier keeps moisture levels stable year-round and protects your foundation from long-term humidity damage.
Yes. A sealed crawl space keeps conditioned air inside the home, improving HVAC efficiency and reducing heating/cooling costs.
A properly installed encapsulation system with a 20-mil liner can last 20–30 years or longer with minimal maintenance.
Get Started Today
Don’t wait for foundation problems to get worse. Schedule a free inspection and get expert solutions from Atlantic Foundation and Crawl Space Repair.