Home of the old Rock Island shops
Spray Foam Insulation in Silvis, IL
A railroad town's homes, with basements and attics that need sealing.
- Free on-site estimates
- Written quote with foam type, thickness and R-value per area
- Leaks, wiring and damp spots flagged before anything gets covered
A Railroad Town's Houses
Spray Foam Insulation in Silvis serves a small city shaped by the railroad. In 1902 the Rock Island Line built its largest locomotive repair shop here on a 900-acre site between its main line and the Burlington's Rock Island branch. The shops now house Railroading Heritage of Midwest America, which bought the facility in late 2021. Silvis had 8,003 residents at the 2020 census.
The housing
The 2020 census counted 3,893 housing units in Silvis, with 9.1% vacant. Many homes are modest one- and two-story houses, some dating to the railroad years and many from the decades after. Hero Street, renamed in 1967 to honor the men from the two-block street who served in the U.S. military, is one of the city's best-known places, lined with small older homes.
Where heat escapes
In older and mid-century houses like these, the usual leaks are at the attic floor, around chimneys and plumbing stacks, and at the rim joist. We seal the attic, add insulation to depth and foam the rim. If walls are empty, dense-pack cellulose can fill them without tearing out plaster.
Climate and code
Rock Island County is in Climate Zone 5A. Illinois' energy code, now the 2024 IECC as amended, took effect on November 30, 2025. For an existing home, we use those targets to set the R-value on the quote.
What a visit covers
A visit in Silvis usually takes about an hour. We go into the attic to measure depth and find the leaks, check the basement rim and walls for moisture and drafts, and look at any garage or shop you want done. Then we send a written quote that lists each area separately, so you can decide what to do first.
Costs
HomeGuide's national numbers put an average attic job at $1,000 to $2,700, rim joist foam at about $2,000 to $2,500, and air sealing at $350 to $3,000. Older houses usually need more sealing. We give you a firm number in writing after we see the house.
Outbuildings
Detached garages and small shops are common. Closed-cell foam on the walls and ceiling stops drafts and condensation, and a garage you can heat is useful through a Quad Cities winter. Get a free estimate
Silvis Facts
- Railroad shops. In 1902 the Rock Island Line built its largest locomotive repair shop in Silvis on a 900-acre site.
- Housing. The 2020 census counted 3,893 housing units in Silvis, 9.1% of them vacant, with a 3.3% homeowner vacancy rate.
- Hero Street. Second Street was renamed Hero Street in 1967 to honor residents who served in the U.S. military.
- Climate zone. Rock Island County is in Climate Zone 5A on OpenEI's county list.
Silvis Questions
Where do older Silvis houses lose the most heat?
At the attic floor and the rim joist. Sealing those two areas makes a noticeable difference.
Can you add insulation without opening walls?
Yes, we can dense-pack walls through small holes, after checking the wiring.
Do you insulate small garages?
Yes. We size the job to how you use the space.
How much does it cost to foam a rim joist?
HomeGuide's range is about $2,000 to $2,500 for a typical house. It depends on the length of the rim and access.
How long does it take?
Most attic and rim jobs take a day or two.
Free Estimates in Silvis, IL
Silvis homeowners: ask for a written quote.
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