Typical job One day for most crawl spaces
Material Heavy polyethylene, seams lapped and taped, mechanically fastened at the wall
Scheduling Monday through Friday, 8 a.m. to 4 p.m.
Service area Six counties across Southeast Michigan
Where the moisture actually comes from
Bare soil under a house is never dry. Water moves up through it by capillary action and evaporates into the crawl space continuously, and the volume is larger than most owners expect. That vapor does not stay put. It rises through the floor system into the rooms above, carrying whatever smell the crawl space has with it.
What it does on the way up is the damage. Framing and subfloor take on moisture, fasteners corrode, and floors above an untreated crawl space develop soft spots and movement that get blamed on the flooring. The humidity also lands on the coldest surface it can find, which in a Michigan summer is the ductwork, and in winter is the rim joist.
A ground barrier stops the evaporation at the source, which is cheaper and more permanent than trying to remove the moisture afterward with equipment. It is a sheet of heavy polyethylene over the whole floor, lapped and taped at the seams and run up the foundation wall, fastened so it stays put. Simple, and it is the single highest-value thing most crawl spaces are missing.
Signs the crawl space is feeding the house
A smell that follows the seasons
Musty air in the house that gets stronger in humid weather, and strongest near floor registers or a hatch, usually starts below. Air moves upward through a house, so the crawl space is effectively the first room the air passes through on its way to the rest of the floors. Candles and filters do nothing about the source.
Cupped or soft flooring above
Boards that cup across their width, or a floor that feels springy in one area, point at moisture reaching the underside of the subfloor. The finish gets replaced, the problem stays, and the new floor does the same thing two years later. Any flooring installer worth hiring will ask what is under the house before quoting.
Condensation on ducts and pipes
Beads of water on ductwork in July, or damp insulation hanging loose, mean the air down there is holding more moisture than the surfaces can handle. Wet insulation stops working and stays wet, and batts that have fallen out of the joist bays are usually the last stage of that.
The dry months are the right months
Late summer and early fall are the best window in Southeast Michigan. The ground is at its driest, the access is easier and the material lies flat. Spring, when groundwater is high, is the worst time to judge what a crawl space normally looks like.
If there is standing water rather than damp soil, the barrier is the second step and not the first. Water has to be kept away from the foundation before anything gets covered, which usually starts outside with downspout and drainage work rather than under the house.
What the job covers
The same order on every crawl space. Anything found outside this list gets documented and quoted separately rather than decided while the crew is already under the floor.
- Inspect for standing water, pests, active leaks and damaged framing before any material goes in
- Clear debris, old torn sheeting and construction leftovers from the floor
- Lay heavy polyethylene across the full floor with seams lapped and taped
- Run the barrier up the foundation wall and fasten it mechanically rather than leaving it loose
- Seal around piers and penetrations, then photograph the finished floor so you have a record of what is under there
Where the rim joist is bare we can seal and insulate it in the same visit, the same detail covered in draft sealing.
Where our work stops
This is the page in the catalog where the boundary matters most, because crawl space work is sold under a lot of names that mean very different things.
Work we take on
- Ground vapor barrier, taped seams and wall attachment
- Debris clearing and old sheeting removal
- Rim joist sealing and insulation while we are under there
Work we do not take on
- Waterproofing systems, interior drain tile and crack injection
- Foundation repair, piering and structural underpinning
- Mold remediation and any air quality testing or treatment
Wright’s Repairs does not sell waterproofing, foundation repair or mold remediation, and a vapor barrier is none of those. If what you have is water entering the crawl space, a foundation that has moved, or growth on the joists, we will say so plainly and route it to the right specialist rather than covering it with plastic. Framing that has already suffered is a separate scope, usually subfloor repair.
Questions homeowners ask
Related repair and maintenance work
Crawl space work almost always arrives with other moisture questions. These are the services homeowners most often book alongside it.
Keeping water away from the house comes first, which is the water damage prevention package and, in the fall, winterizing the house. Above the crawl space the same envelope logic applies to attic insulation. Owners planning to use the space below grade look at basement work, and the annual walkthrough is the annual home check.
The full catalog sits under Wright’s Repairs. View our Portfolio or contact us now for a free quote.
