Dehumidifiers
Crawl space dehumidifier installation in Louisville, KY
Commercial-grade dehumidifiers sized to the space, installed properly and plumbed to drain, so the air under your house stays below the line where mold grows. Usually the last step of an encapsulation and sometimes the first thing a house needs.
Signs you need it
When the air is the problem
Humidity above 60 percent under the house
Louisville summers push crawl space humidity into the 70s and 80s. Mold starts at 60.
A sealed space that still feels damp
Sealing stops new moisture. It does not remove what is already there or what migrates through concrete.
A portable unit that runs constantly and never catches up
Household dehumidifiers are not built for a crawl space and do not last in one.
Cupping floors and sticky doors in summer
Wood upstairs is absorbing moisture from the air below.
What we do
The right unit, sized right, drained right
We install commercial crawl space dehumidifiers built for low, dirty, cool spaces: units that pull far more water per day than a household machine, run on a humidistat, and drain by gravity or condensate pump so nobody has to empty a bucket. Sizing matters: too small and it runs forever without reaching the set point; too big and it short-cycles. We size to the cubic footage and the moisture load, mount or set the unit for airflow and service access, and run the drain properly.
In a sealed crawl space a dehumidifier is the control system (the humidity guide has the numbers it holds). In an unsealed one it is a losing battle, which is why we usually pair it with a vapor barrier or a full encapsulation.
- Commercial units rated for crawl spaces, not portable household machines
- Sized to the space and the moisture load
- Gravity drain or condensate pump, no buckets
- Humidistat control, filter access, manufacturer warranty registered
See the work
A dehumidifier in a sealed crawl space
Footage from a Watertight job. Short and silent, so it plays anywhere.
How the job goes
A half day when the space is already sealed
Measure
Cubic footage, current humidity, whether the space is sealed, where the drain can go.
Place
Mounted or set on a stand at the best point for airflow and service.
Drain and power
Condensate routed to a drain or pump; a dedicated outlet where needed.
Set and verify
Humidistat set, readings taken, filter schedule explained, warranty in hand.
On the job
From the crew's own photos
Real Watertight jobs. Nothing staged, nothing stock.
What it costs
Price your crawl space dehumidifier installation in a minute
A few questions give a planning range from the same calculator as the cost guide. See every line, or book a free inspection with your numbers attached.
Why Watertight
Part of the moisture system, not a gadget
If your space needs draining or sealing first, we will say so, because a dehumidifier in a wet, vented crawl space is money down the drain.
- Honest about when a dehumidifier alone will not work
- Units we service and stand behind
- Installed as part of the whole moisture system, with its manufacturer warranty
4 weeks agoThis company Water Tight did a great job, they removed all of my insulation that was moisture soaked. Installed a new crawl space dehumidifier and treated for any existing mold problems. They added some steel shims to floor supports. They were very…
a month agoThese guys are great. We just had a total encapsulation of our crawlspace. We had standing water underneath our house and it was causing problems. WaterTight Waterproofing came in and encapsulated everything. They put in a drain field and installed a…
3 months agoThe guys were very professional and on top of their game! Everything was explained to me and all my questions were answered and left me with no doubt that they knew what they were doing. I have already given them as a recommendation to someone asking about…
Questions
Crawl space dehumidifier installation: what people ask
Still have a question? Call the office, Monday to Saturday, 9:00 AM to 5:00 PM.
How much does a crawl space dehumidifier cost installed?
It depends on the unit the space needs and where the drain can run, and it is often included in an encapsulation price. Every job is priced in writing after a free inspection, and the cost guide has typical Louisville ranges and a calculator for planning.
Can I use a regular dehumidifier from the hardware store?
You can, briefly. They are not rated for crawl space conditions, they need emptying, and they tend to wear out early. A crawl space unit costs more and is built for the job.
Does it need a sealed crawl space to work?
It works far better in one. In a vented space it fights an endless supply of outdoor air. We usually recommend sealing first.
How much does it cost to run?
A properly sized unit in a sealed space cycles on and off rather than running constantly. Most homeowners see a modest change on the electric bill and a bigger change in comfort and cooling costs upstairs.
Projects
Related jobs, before and after
Each pair is one Watertight job, photographed before and after. Nothing staged, nothing stock.
A cluttered crawl space, cleared and lined
A flexible duct lying on old sheeting and debris, then lifted clear over a clean liner across the floor.
Read the story
A crawl space drain trench, dug then graveled
The drainage that goes in before any liner: a trench with drain pipe along the wall, then filled with clean gravel.
Read the story
Crawl space encapsulation, start to finish
Bare dirt and rubble under the joists, now covered by a white liner from the floor up the block wall.
Read the storyWhere we do this work
Crawl space dehumidifier installation across Louisville and Kentuckiana
Every area has its own page on the houses and ground in that part of town.
Free estimate
Dehumidifiers: get a written price
Tell us what you are seeing. A technician calls back during business hours and books a time to look. No cost, no obligation.
- Photos and a plain explanation of the cause
- Written scope and price
- Our own crew, not a subcontractor
- We beat any reputable company's price on the same scope
