Posey County seat, Indiana's westernmost city
Spray Foam Insulation in Mount Vernon, IN
Insulation for historic homes in town and the farm buildings around it.
- Free on-site estimates
- Written quote with material, thickness and R-value for every area
- Basements, crawl spaces and attics checked for moisture and leaks first
Insulating Indiana's Westernmost City
Spray Foam Insulation in Mount Vernon serves the Posey County seat, the westernmost city in Indiana, on the Ohio River in the state's far southwest corner. Several of its historic areas are on the National Register, including the Posey County Courthouse Square, the Mount Vernon Downtown Historic District and the Welborn Historic District.
Older homes
Historic districts mean older houses: plaster walls, little wall insulation, shallow attics and old foundations. Those homes respond well to attic sealing, loose fill, rim joist foam and dense-pack walls where wiring allows.
Housing count
The 2020 census counted 3,095 housing units in Mount Vernon, 10.2% vacant. Mount Vernon has a humid subtropical climate with hot, humid summers and mild to cool winters.
Industry and farms
Mount Vernon is home to a CountryMark refinery built in 1940 and has had large ethanol plants. Surrounding Posey County is farm country, and pole barns and equipment buildings are common. Closed-cell foam on the steel stops condensation and holds heat.
Costs
HomeGuide lists closed-cell foam at $3.00 to $5.00 per square foot and rim joist foam at $2,000 to $2,500 nationally. The written estimate after our visit is your price.
Older and newer homes side by side
Mount Vernon's historic districts sit close to neighborhoods of mid-century ranches and newer homes. Mid-century houses typically need the attic sealed and topped up, the rim joist foamed, and the crawl space or basement checked for moisture. Those three steps usually bring the biggest comfort gain for the money.
Call (812) 965-6169 or get a free estimate to set up a visit.
Mount Vernon Facts
- Westernmost city. Mount Vernon is the westernmost city in Indiana and the Posey County seat (Wikipedia).
- Historic districts. The Posey County Courthouse Square, Mount Vernon Downtown Historic District and Welborn Historic District are on the National Register.
- Housing count. The 2020 census counted 3,095 housing units in Mount Vernon, 10.2% vacant.
- Refinery town. Mount Vernon is headquarters of a CountryMark refinery originally built in 1940.

Mount Vernon Questions
Do you travel to Mount Vernon?
Yes, it is part of our Tri-State service area west of Evansville.
Can you insulate an old house in the historic district?
Yes, carefully, with attention to wiring and plaster.
Can foam stop a pole barn from dripping?
Closed-cell bonded to the steel keeps warm, moist air off the metal, which stops the drip.
Free Estimates in Mount Vernon, IN
Ask for a free visit and written quote in Mount Vernon.
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