Southwest of Cedar Rapids on U.S. 151
Spray Foam Insulation in Fairfax, IA
Tightening up homes built during Fairfax's growth spurt.
- Free on-site estimates
- Written quotes that list R-value and depth for each area
- Air leaks sealed before new insulation covers them

A Town That Tripled in Twenty Years
Spray foam insulation in Fairfax is mostly about homes built in the last two decades. Fairfax went from 889 residents in 2000 to 2,828 in 2020, and its housing units rose from 336 to 1,127. The median year built is 2004, with 38.9% of homes built from 2000 to 2009, and 92.4% are owner-occupied.
Common weak spots in 2000s homes
Houses from this era usually meet the code of their time but miss a few areas: the rim joist, the attic hatch, ceilings below bonus rooms, and the wall between the house and an attached garage. Those are quick, targeted jobs for closed-cell foam.
Owners who plan to stay
With nearly every home owner-occupied, Fairfax households tend to make long-term upgrades: finishing the basement, adding a workshop in the garage, or replacing a furnace. Air sealing first makes the most of whatever comes next, including a smaller, more efficient heating system.
Railroad roots
Fairfax was laid out in 1863 when the railroad reached the site and was named for Fairfax County, Virginia. U.S. Route 151 runs through town, about 7 miles southwest of downtown Cedar Rapids, so it is a short trip for us from Iowa City as well.
Climate
Linn County is in Climate Zone 5A. For new homes, Iowa's adopted code sets R-49 ceilings and R-20 walls or R-13 plus R-5 continuous insulation. Get a free estimate
Fairfax Facts
- Tripled since 2000. Fairfax grew from 889 residents in 2000 to 2,828 in 2020, and housing units went from 336 to 1,127.
- Mostly 2000s homes. Median year built is 2004, with 38.9% of homes built from 2000 to 2009 and 92.4% owner-occupied (2019 to 2023 ACS).
- Commuter location. U.S. Route 151 runs through Fairfax, about 7 miles southwest of downtown Cedar Rapids.
- Railroad-era origins. The town was laid out in 1863 when the railroad reached the site and was named after Fairfax County, Virginia.

Fairfax Questions
Should I air seal before replacing my furnace?
If you can, yes. A tighter house may need a smaller furnace. Ask your HVAC contractor to size it after the sealing is done.
Can you foam the wall between my garage and house?
If it is open, yes. If it is drywalled, we can often reach the top from the attic and the bottom from the basement rim, or use dense-pack.
How much does a rim joist job cost?
HomeGuide lists about $2,000 to $2,500 for a house. Your price depends on the perimeter and access, and we quote it in writing.
Free Estimates in Fairfax, IA
Fairfax homeowners: request a free estimate.
Spray Foam Insulation Near Fairfax
- Spray Foam Insulation in Iowa City, IA
- Spray Foam Insulation in Coralville, IA
- Spray Foam Insulation in North Liberty, IA
- Spray Foam Insulation in Tiffin, IA
- Spray Foam Insulation in Solon, IA
- Spray Foam Insulation in West Branch, IA
- Spray Foam Insulation in Kalona, IA
- Spray Foam Insulation in West Liberty, IA
- Spray Foam Insulation in Cedar Rapids, IA
- Spray Foam Insulation in Marion, IA
- Spray Foam Insulation in Hiawatha, IA
- Spray Foam Insulation in Ely, IA
- Spray Foam Insulation in Mount Vernon, IA
- Spray Foam Insulation in Lisbon, IA