
Johnson County's largest city
Spray Foam Insulation in Greenwood, IN
Greenwood grew from a small town to more than 63,000 people in seventy years, so its houses come from every decade since the 1950s.
- Free estimates after we see the space
- Itemized written quotes with foam type, depth and R-value
- Moisture and air leaks checked before anything gets covered
Seventy Years of Houses in One City
Spray foam insulation in Greenwood has to fit a housing stock built in waves. According to Wikipedia, the city had 3,066 residents in 1950 and 19,327 by 1980, then grew another 28.2% between 2010 and 2020 to reach 63,830. The 2020 census counted 25,980 housing units. That means a single street can hold a 1950s ranch, a 1970s tri-level and a house finished last year, and each one leaks in a different place.
Older ranches near the center
The homes closest to Madison Avenue and the old downtown tend to be small ranches over crawl spaces. Common problems are batts falling out of the floor, open foundation vents and an attic with a few inches of settled insulation. Closing the crawl space, foaming the rim joist and sealing and topping up the attic is the usual plan, and it is often done in that order.
Tri-levels and split-levels
Greenwood has many homes with a lower family room on a slab, bedrooms over a garage and a crawl space under one wing. The rim joist steps between levels and the garage ceiling under the bedrooms is a frequent cold spot. Closed-cell foam on the rim and the garage ceiling, plus a sealed crawl space, addresses the worst of it.
Newer subdivisions
Homes built since 2000 toward the south and west usually have reasonable attic insulation but still leak at rim joists, bonus room floors, attic hatches and can lights. These jobs tend to be targeted and smaller.
Code targets for Greenwood work
The 2020 Indiana Residential Code lists R-38 for ceilings and R-13 or R-10 continuous for crawl space walls in Climate Zone 5, which covers Johnson County. For existing attics the Department of Energy goes further, suggesting R-60 when the attic is bare. We measure what you have and show the target on the quote.
Creeks and wet ground
Pleasant Run crosses the northern half of the city for about five miles on its way to the White River, and Honey Creek, Grassy Creek and Tracy Ditch drain other parts of town. Lots near those streams, and the poorly drained till soils common in central Indiana, are good reasons to check a crawl space for moisture before insulating it. Get a free estimate
What to Know in Greenwood
- Population growth. Greenwood had 3,066 residents in 1950, 19,327 in 1980 and 63,830 in 2020, a 28.2% gain over 2010 (Wikipedia).
- Housing units. The 2020 census counted 25,980 housing units in Greenwood, with a homeowner vacancy rate of just 1.0% (Wikipedia).
- Weather. Wikipedia gives a January mean low of 22.9F, a July mean high of 85.2F and about 45 inches of precipitation a year, with May the wettest month.
- Code zone. Johnson County is in IECC Climate Zone 5A (OpenEI); the 2020 Indiana Residential Code lists R-38 ceilings and R-13 or R-10 continuous crawl space walls there (Insulation Institute).

Greenwood Questions
What is the most common fix in an older Greenwood ranch?
Closing a vented crawl space, foaming the rim joist and sealing the attic before adding insulation. Those three steps usually fix cold floors and a hot upstairs.
Does a newer Greenwood home need spray foam?
Sometimes, in targeted spots: the rim joist, the floor of a bonus room over the garage and the attic hatch. We check before recommending anything.
I live near Pleasant Run. Should I worry about my crawl space?
It is worth checking. We look for standing water and damp framing first, and point out any drainage issue before quoting insulation.
Free Estimates in Greenwood, IN
Free, measured estimates for Greenwood homes, garages and shops.
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