WHEATON HOMEOWNERS
Your Crawlspace Is Failing—
And It’s Affecting Everything Above It
Wheaton's biggest building boom hit in the 1950s and '60s, when families were pouring out of the city faster than local builders could put up subdivisions. Here's what that means for your home — and what to do about it.
Serving Wheaton & the
Northwest Suburbs
True Seamless Encapsulation
100-Year Life Expectancy
Wheaton Grew Fast After the War. Your Crawlspace Grew With It.
Wheaton had already been around for a century by the time its biggest growth spurt hit. The city was founded in the 1830s by Erastus Gary and the Wheaton brothers, who gave land to the railroad in exchange for a stop — and the name stuck. But it was the 1950s and '60s that changed the town's shape for good, as families moved out of Chicago in droves and local builders like Graeme Stewart turned old farmland and even a defunct country club (what's now Kelly Park) into new single-family subdivisions almost overnight.
Homes went up fast to keep pace with demand, and the crawlspace systems built underneath them were built for that decade, not this one. Basic plastic sheeting over clay, minimal drain tile, sump systems sized for average rainfall — not for the freeze-thaw cycles and heavier storms DuPage County sees now. Sixty-plus years of Illinois clay expanding and contracting under those homes has pushed a lot of those original systems well past their limits.
Your home has held up. It’s time to update what’s underneath it.
If You’re Seeing Any of These Signs, Your
Crawlspace Is Already in Trouble
If two or more of those apply, your crawlspace is actively working against your home’s comfort, air quality, and energy efficiency. And it’s not going to fix itself.
Musty Smells
In your basement or first-floor rooms.
Cold Floors
In winter, even with the heat running.
High Energy Bills
Higher-than-expected heating and cooling costs.
Humidity & Condensation
Issues inside the home
Foundation Cracks
Visible cracks on the foundation walls.
Standing Water
Or soft, spongy ground in the crawlspace after rain
Original Rockwool Insulation?
If you have the old black tar-sprayed over fiber kind, it needs addressing immediately.
There’s a Reason Standard Vapor Barriers Keep Failing Here
Most contractors will quote you plastic sheeting and tape. It’s cheap, it goes in fast, and it looks fine in photos. But a few years down the road in an Illinois climate, the tape peels, the plastic shifts, and moisture finds every gap. Anyone who comes in to service your HVAC or plumbing punches right through it.
Concrete sounds more permanent, but it’s porous, it cracks and the curing process releases significant moisture for weeks — exactly the opposite of what you’re trying to achieve.
Neither of those approaches was designed for the specific conditions under a Wheaton home. Ours was.
The True Seamless Nu-Crawl Encapsulation Method—Built for Homes Like Yours
We don’t install vapor barriers. We install a system. The Nu-Crawl encapsulation method starts with a custom-fabricated liner — pre-measured to the exact dimensions of your crawlspace, 40 to 60 mils thick (several times heavier than standard plastic sheeting), and spray-seamed on-site into one continuous, unbroken surface.
The complete system includes:
Custom-fabricated seamless liner — spray-seamed on-site into one continuous surface
Reflective insulation on foundation walls — sealed to the liner without tape
Closed-cell spray foam in the sill boxes — seals the gap where foundation meets framing
All penetrations permanently sealed — sewer pipes, footings, columns, everything
Optional foam board underlayment for added insulation value
HVAC integration — your existing system conditions the crawlspace like a basement
Nu-Crawl vs. What You’ve Probably Been Quoted:
Nu-Crawl
Plastic & Tape
Concrete
True seamless installation
Puncture-resistant
Bonds to pipes & columns
No ongoing maintenance
Life expectancy
100 Years
Unknown
Unknown
What Changes After Crawlspace Encapsulation?
Your Air Quality Improves
Research consistently shows that a significant portion of the air circulating through your living space comes up from the crawlspace — the stack effect. Seal it, and you stop sending moisture, mold spores, and rockwool fibers upward into your home.
Your Floors Stop Being Cold
A conditioned crawlspace keeps the temperature under your subfloor consistent with the rest of the house. Many homeowners notice the difference in their first winter.
Your Energy Bills Come Down
Cut off the crawlspace as a path for outside air infiltration and your heating and cooling system runs less to hold temperature.
Your Radon Exposure Drops
Radon is a soil gas. The seamless Nu-Crawl liner acts as a passive radon barrier — and we can install a draw point for an active mitigation system if needed.
Flooding Doesn't Ruin Your Investment
Unlike plastic sheeting that lifts and separates when water comes in, the Nu-Crawl system is completely unaffected by flooding. After a heavy Illinois rain, your encapsulation is exactly as it was the day we installed it.
We Know Wheaton Homes
Wheaton has a character that's hard to find in newer suburbs — the historic downtown, Wheaton College anchoring the east side of town, streets full of ranch and split-level homes built in that same postwar rush. A lot of those homes share the same builders, the same era, and the same crawlspace problems.
We've been under enough of those original 1950s and '60s crawlspaces to know exactly what decades of Illinois clay does to an old sump system, and what it looks like when insulation from that era has broken down and started dropping fibers into the air below your floors. We know the difference between patching it and actually fixing it.
Your home's held up fine for 60-plus years. It's time to make sure what's underneath it can say the same.
Questions We Hear From Wheaton Homeowners
How is this different from a regular vapor barrier?
A vapor barrier is plastic sheeting cut to fit, taped at the seams, and pinned to the walls. Nu-Crawl is a custom-fabricated liner spray-seamed into one continuous surface — no seams, no tape, no adhesive. It’s significantly thicker and bonds directly to structural surfaces.
What happens to my existing rockwool insulation?
We remove it as part of the installation. That material should come out anyway — it’s a health risk and it’s no longer performing effectively. The Nu-Crawl system replaces it with a properly sealed, insulated crawlspace that actually works..
How long does installation take?
Most installs are completed in one to two days. The liner is ready immediately — no curing time, no waiting, unlike concrete.
Do I have to maintain it after installation?
No. It’s bonded in place. Nothing to check, retape, or re-seal. No other crawlspace system we’re aware of carries a 100-year life expectancy.
Will this help with my energy bills?
In most cases, yes. When you cut off outside air infiltration through the crawlspace, your HVAC system runs less. It’s one of the most consistent benefits homeowners report after installation.
Ready to Stop Guessing What’s Going On Down There?
A cheap quote and a roll of plastic might look like a fix. But if your Wheaton home dates back to that original postwar building boom, that approach is going to cost you more down the line — in energy, in comfort, and eventually in repairs. We offer free estimates with a straight answer from people who've been doing this a long time. No pressure, no obligation.
(630) 360-2206 | crawlspaces.com
Serving Wheaton and the surrounding Northwest Suburbs of Chicago