On the edge of Horicon Marsh
Spray Foam Insulation in Waupun, WI
A two-county city that grew quickly in the 1990s.
- Free on-site estimates
- Written quote by area with R-values
- Damp basements and roof leaks flagged before work

Homes Near the Marsh
Spray foam insulation in Waupun covers homes from a long history and a 1990s growth spurt. The population rose from 8,207 in 1990 to 10,718 in 2000 and stood at 11,344 in 2020. Waupun sits near the edge of the Horicon Marsh, the largest cattail marsh in the United States, with land rising from about 870 feet at the Rock River to 941 feet.
Low ground
Homes near the river and marsh can have high water tables and damp basements. We check for moisture before any below-grade insulation and use closed-cell foam where it is dry.
1990s homes
Houses from that growth period usually need rim joist foam, a sealed attic hatch and help with rooms over garages.
Older homes
The older core needs attic sealing, depth and often wall insulation.
Costs
HomeGuide lists rim joist foam at about $2,000 to $2,500 and attic jobs at $1,000 to $2,700. Written estimates after a visit.
Garages and shops
Many Waupun homes have attached garages with rooms above, which tend to run cold. Foam in the floor over the garage and on the kneewalls fixes most of it. Detached shops and pole buildings around the city get closed-cell foam on the steel to stop dripping and hold heat. Each space is listed separately on the quote.
What the visit covers
We start in the basement with a moisture check and measure the rim joist, then look at the attic depth, bypasses and hatch. For homes near the marsh we pay close attention to water marks and sump activity. You get a written quote listing each area with material and R-value.
About Waupun
- Next to the marsh. Waupun lies near the edge of the Horicon Marsh, the largest cattail marsh in the U.S.; elevations range from 870 feet at the Rock River to 941 feet.
- Two counties. In 2020, 7,795 residents lived in the Dodge County part and 3,549 in the Fond du Lac County part.
- 1990s growth. The population rose from 8,207 in 1990 to 10,718 in 2000 and was 11,344 in 2020.

Waupun Questions
Do you travel to Waupun?
Yes, it is at the southern edge of our service area.
Can you insulate a damp basement near the marsh?
After the water is handled, closed-cell foam works well.
What does a 1990s Waupun home need?
Rim joist foam and attention to bonus rooms.
Do you work in both county parts?
Yes.
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