Drainage, vapor barriers, and sump systems that keep the space under your home dry year-round
Crawl space waterproofing stops the cycle of standing water, damp soil, and humid air under your home: drainage to move water out, a sealed vapor barrier to stop soil moisture, and dehumidification to control the air. Wet crawl spaces feed mold on joists, rot in subfloors, and musty air upstairs — waterproofing addresses the water at its entry point instead of treating symptoms above. If the space has standing water today, removal and drying come first, then the system that keeps it out.
Average cost
$1,500–$9,000
Typical completion
2 days
Not sure who to call first? See the correct call order guide →
A certified local pro will call within 15 minutes.
Quick answer
Crawl space waterproofing combines drainage and a sump system to move water out with a sealed vapor barrier and dehumidification to control what remains. Typical cost is $1,500–$9,000 over about two days. Waterproofing handles liquid water while encapsulation handles vapor and air — a chronically wet crawl space normally needs the drainage first.
HearthDry is an independent resource. We do not perform restoration work. We connect homeowners with licensed, IICRC-certified third-party contractors. Cost ranges are estimates only. Verify contractor licensing before hiring.
