Professional crawlspace waterproofing serving Des Moines and surrounding areas.
The crawlspace is the part of the house nobody sees until something upstairs smells wrong. Under half the metro’s older stock, ground moisture rises all year, vents breathe Iowa’s humid summers in and out, and the joists drink it quietly for years. Crawlspace waterproofing in Des Moines, Iowa treats the space as what it is — the house’s foundation-side lung: drainage where water enters, encapsulation where humidity lives, and dehumidification that keeps the air the whole home breathes clean.
| Layer | What it does | Typical range | |—|—| | Vapor barrier | Soil sealed with 10–20 mil liner | $1,200 – $2,500 | | Full encapsulation | Sealed vents + walls + drainage + dehu | $4,000 – $10,000 | | Interior drainage + sump | Water intercepted before it pools | $2,000 – $5,000 | | Dehumidifier | Space held at 50–55% RH | $1,200 – $2,500 | | Joist mold treatment | Existing growth cleaned and sealed | $800 – $3,000 | | Vent sealing + door | Vents closed for good, insulated door | $400 – $1,000 |
The crawlspace tells you how it’s doing — you just have to look. Musty smell at the floor registers, hardwood that cups every summer, baseboards that gap in winter, higher energy bills than the neighbor’s identical floor plan: each is the crawlspace reporting through the floor. Encapsulation costs thousands; the warped hardwood, the recurring mold remediation, and the decade of conditioned air leaking into an open vent cost more. The inspection is free, and it reads the joists like a history book.
Des Moines’ crawlspace stock spans eras and geography: century homes with vented dirt-floor spaces in the older neighborhoods, mid-century ranches with gravel and open vents, and infill builds with conditioned-space aspirations that were never finished. The metro’s river bottoms hold shallow groundwater; the clay uplands hold surface water against every perimeter. Summers pump humidity through open vents; winters freeze whatever pipes run through. The encapsulation that knows the metro seals for all four seasons.
Serving Des Moines, Polk County, and the metro — inspections, encapsulation, drainage, and the air-quality difference upstairs.
Musty air from the registers? Call — inspection, encapsulation quote, and the crawlspace handled for good.
Fast, professional water damage restoration for homes and businesses — extraction, drying, and full repair.
Complete flood cleanup and restoration after rising water, storms, and overflow.
24/7 water extraction with truck-mounted pumps to remove standing water fast and limit damage.
Full structural repair and reconstruction after water damage — drywall, floors, and framing.
Detailed moisture inspection and assessment with thermal imaging to find hidden water damage.
Cut out, replace, and repaint water-damaged drywall so walls look new again.
Stack effect: the house pulls air upward from the lowest space, so crawlspace air — humidity, soil gas, mold spores — becomes the air the family breathes on every floor. A crawlspace at 80% humidity loads the whole home's air; the musty smell upstairs is the signature. It also warps the hardwood above it, feeds the mold on the joists, and costs real money in heating and cooling. The crawlspace isn't separate from the house; it's the house's basement-side lung.
A plain vapor barrier ($1,200 to $2,500) covers the soil and slows ground moisture — the right call for a healthy crawlspace that needs a step up. Encapsulation goes further: sealed vents, walls wrapped, drainage handled, and a dehumidifier holding the space at controlled humidity ($4,000 to $10,000). Metro crawlspaces with recurring water, mold on the joists, or a history of problems need the full system; dry crawlspaces with one damp corner don't. The inspection tells you which one yours is.
Vapor barrier $1,200 to $2,500; full encapsulation $4,000 to $10,000 by size; interior drainage + sump $2,000 to $5,000; dehumidifier $1,200 to $2,500; joist mold treatment $800 to $3,000; sump pump replacement $500 to $1,200. Diagnostics free with any work.
After encapsulation, yes — sealed, dehumidified crawlspaces hold safe storage and even conditioned storage in many homes. What you can't do is finish it as living space; code and practicality both treat a crawlspace as a service space. But the boxes that sat on pallets waiting for a dry corner move down the first month after encapsulation, and the garage gets its floor back.
Our certified technicians respond fast, assess the damage, and give you a clear plan — with no obligation and no up-front cost.