Crawl spaces
Crawl space repair
Crawl space repair controls moisture under the house: sealing the ground with a vapor barrier or full encapsulation, adding drainage and a sump where water collects, closing vents, and running a dehumidifier. A dry crawl space means warmer floors, less mold and fewer pests.
By calling, you agree to be connected with an independent waterproofing contractor, who may call or text you back about your request at the number you call from. Calls may be recorded for quality and routing. Consent is not a condition of any purchase; you can opt out at any time, and message and data rates may apply. Privacy policy.
- Typical time
- One to three days.
- Repair or replace
- Drain and seal; replace rotted wood if found.
Call about crawl space repair
(833) 460-4463By calling, you agree to be connected with an independent waterproofing contractor, who may call or text you back about your request at the number you call from. Calls may be recorded for quality and routing. Consent is not a condition of any purchase; you can opt out at any time, and message and data rates may apply. Privacy policy.
Mention damp crawl space and your ZIP.
Additions, porches and some older homes in the valley sit over crawl spaces rather than full basements. Open vents let humid summer air in, where it condenses on cool surfaces.
Wet insulation falling from the joists, musty smells upstairs and cold floors in winter are common complaints.
Crawl Space Repair at a glance
- What it is
- Crawl space repair controls moisture under the house: sealing the ground with a vapor barrier or full encapsulation, adding drainage and a sump where water collects, closing vents, and running a dehumidifier.
- Service category
- Crawl spaces
What are the signs you need damp crawl space help?
- Musty smell in rooms over the crawl space
- Sagging or wet insulation
- Standing water or mud
- Mold on joists
- Cold floors
Quick answers
What should you know about crawl space repair first?
How long crawl space repair takes
One to three days.
When damp crawl space can wait, and when it can't
Planned, sooner with standing water.
Fix or replace damp crawl space?
Drain and seal; replace rotted wood if found.
Why damp crawl space happens
Humid air, ground moisture, poor drainage.
Crawl Space Repair
Which crawl space repair services are there?
Each page covers one problem in depth: signs, what the waterproofing contractor does, timing and cost drivers.
- Crawl Space EncapsulationCrawl space encapsulation seals the crawl space from outside air and ground moisture with a heavy vapor barrier on the floor and walls, closed vents, insulated walls and a dehumidifier, turning it into a dry, conditioned space..
- Crawl Space DrainageCrawl space drainage removes standing water under the house with a perimeter drain and a crawl space sump pump, plus outside fixes like downspouts and grading so less water arrives in the first place..
The work
How is crawl space repair done, step by step?
- 1
Inspect
Moisture, drainage, insulation and structure.
- 2
Drain
Perimeter drain and sump if water collects.
- 3
Seal
Heavy vapor barrier on floor and walls, vents sealed.
- 4
Condition
Dehumidifier to hold humidity down.
What affects the cost of crawl space repair?
Driven by size, drainage and barrier.
- Square footage
- Standing water and drainage
- Barrier thickness
- Insulation removal
- Dehumidifier
Is this service available near me?
Location is only used to find the service area nearest you. It stays on your device and isn't stored.
Happening right now? 24-hour emergency service is the faster route than a scheduled visit.
What do homeowners ask about crawl space repair?
Is encapsulation worth it?
It usually improves comfort, air quality and floor temperatures, and protects wood framing from moisture.
What are signs of crawl space problems?
Musty smells upstairs, sagging or bouncy floors, high humidity, standing water, mold on joists and insulation falling from the subfloor all point to crawl space problems.
What affects the cost of crawl space repair?
Crawl space size and height, whether drainage or a sump is needed, structural repairs to joists or piers, insulation removal and the type of vapor barrier.
Can a crawl space cause mold in the house?
Yes. Air from the crawl space moves up into living areas, carrying moisture and mold spores. Controlling crawl space moisture improves indoor air.
How do I fix sagging floors over a crawl space?
Common fixes include adding support piers or jacks, sistering damaged joists and replacing rotted beams, combined with moisture control.
Do crawl space repairs need permits?
Structural work and electrical for sumps or dehumidifiers may require permits; your contractor should confirm local requirements.
Should I remove old crawl space insulation?
Wet, sagging or moldy fiberglass insulation is usually removed during repairs, and insulation is often moved to the walls in encapsulated crawl spaces.
Where can I verify this information about your area?
- 1U.S. Environmental Protection Agency: MoldGuidance on moisture control and keeping indoor humidity low to prevent mold.
- 2USDA Natural Resources Conservation Service: Web Soil SurveyLook up soil drainage class and shrink-swell potential for any lot in your area.
- 3FEMA: Flood Map Service CenterCheck whether a property in your area is in a mapped flood zone before finishing a basement.
- 4U.S. Environmental Protection Agency: RadonWhy basements in your area should be tested for radon, and how sealed sumps fit with mitigation.
- 5Federal Trade Commission: Hiring a ContractorWhat to check before hiring: licensing, insurance, written estimates and payment terms.
Service area
Where is crawl space repair available?
Available in every state
Calls are connected with an independent contractor that serves your ZIP code, anywhere in the U.S.
Northeast & Mid-Atlantic
Connecticut · Delaware · Maine · Maryland · Massachusetts · New Hampshire · New Jersey · New York · Pennsylvania · Rhode Island · Vermont · Washington, DC
Midwest & Great Lakes
Illinois · Indiana · Iowa · Michigan · Minnesota · Missouri · Nebraska · North Dakota · Ohio · South Dakota · Wisconsin
Southeast & Gulf Coast
Alabama · Florida · Georgia · Kentucky · Louisiana · Mississippi · North Carolina · South Carolina · Tennessee · Virginia · West Virginia
Mountain West & Southwest
Arizona · Colorado · Idaho · Montana · Nevada · New Mexico · Utah · Wyoming
Pacific Coast & Northwest
Alaska · California · Hawaii · Oregon · Washington
Related
Which services are often paired with crawl space repair?
Crawl Space Encapsulation
Crawl space encapsulation seals the crawl space from outside air and ground moisture with a heavy vapor barrier on the floor and walls, closed vents, insulated walls and a dehumidifier, turning it into a dry, conditioned space..
Learn more
Crawl Space Drainage
Crawl space drainage removes standing water under the house with a perimeter drain and a crawl space sump pump, plus outside fixes like downspouts and grading so less water arrives in the first place..
Learn more
Basement Dehumidifiers
A basement dehumidifier removes moisture from basement air to keep humidity below about 50–60%, preventing musty odors, mold and condensation.
Learn moreGuides
What should you read before calling?
Call about a damp crawl space
Humid air, ground moisture, poor drainage.
By calling, you agree to be connected with an independent waterproofing contractor, who may call or text you back about your request at the number you call from. Calls may be recorded for quality and routing. Consent is not a condition of any purchase; you can opt out at any time, and message and data rates may apply. Privacy policy.