Crawl Space Waterproofing
A wet crawl space causes mold, structural damage, and high energy bills. Find local waterproofing specialists who can keep water out for good.
$1,200–$4,000
Basic Barrier
$1,500–$5,000
Drainage System
$5,000–$12,000
Full System
Waterproofing Methods
Vapor Barrier
$1,200–$4,000A heavy-duty poly barrier on the floor stops ground moisture from evaporating into the space. The first and most important step.
Interior Drainage System
$1,500–$4,000A perforated drainage channel around the perimeter collects water seeping in and directs it to a sump pit.
Sump Pump
$500–$1,500Automatically pumps collected water out of the crawl space. Essential when groundwater or flooding is a recurring issue.
Exterior Grading
$200–$800Regrading soil to slope away from your foundation stops surface runoff before it enters. Often the most overlooked fix.
Crawl Space Encapsulation
$3,000–$8,000The complete solution: seals walls and floor with vapor barrier, closes vents, adds dehumidifier. Best for ongoing moisture problems.
FAQs
How much does crawl space waterproofing cost?
Crawl space waterproofing costs $1,500–$5,000 for most homes. A basic vapor barrier runs $1,200–$4,000. A full drainage system with sump pump adds $1,500–$5,000. Full encapsulation with drainage runs $5,000–$12,000.
What is the best way to waterproof a crawl space?
The most effective approach combines exterior grading improvements (to redirect surface water), an interior drainage channel, a sump pump, a heavy-duty vapor barrier, and full encapsulation. For minor moisture, a vapor barrier alone may suffice.
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