
Eaton County's largest community
Spray Foam Insulation in Delta Township, MI
1970s houses that are ready for an upgrade.
- Free in-home estimates with measurements
- Itemized written quote: material, thickness and R-value per area
- Leaks, damp spots and old insulation checked before we cover anything
Built Mostly in the 1970s
Spray Foam Insulation in Delta Township deals mostly with houses from the 1960s through the 1990s. Delta is the most populous community in Eaton County, with 33,119 people in 2020, and its Waverly area holds most of the township's urbanized population. Waverly's median home was built in 1979, and fewer than 5% of homes there predate 1950.
What 1970s houses need
Houses from this era usually have some insulation everywhere, but not much. Attics with six inches of fiberglass that has since compacted. 2x4 walls with R-11 batts. Basements with uninsulated block walls and bare rim joists. Aluminum or early vinyl windows that have been replaced, while the walls and attic were left alone. The biggest returns usually come from sealing the attic floor and the rim joist, then adding attic depth.
Split-levels and tri-levels
Delta has plenty of split-level houses. Their weak spots are the rooms over the garage, the band joist between levels, and the short kneewalls and crawl spaces under the half-flights. Foam fits these awkward spaces well.
Many rentals
About 44% of occupied homes in the Waverly area are rented. Landlords call us to reduce heating complaints and to stop frozen pipes on outside walls.
Block basements in 1970s homes
Many homes from the 1970s sit on concrete block basements. Block walls can let moisture wick through, and their hollow cores and the rim joist above them leak air. Closed-cell foam on the rim and upper block walls seals both. We check for efflorescence, the white mineral deposit that shows water moving through the block, before recommending foam on the walls.
Split-level crawl spaces
Some split-levels have a crawl space under one wing instead of a full basement. Closed-cell foam on the crawl walls and rim, plus a ground vapor barrier, warms the floor above.
Utilities and history
Delta Township is in the Lansing Board of Water & Light's electric territory, which lists insulation and air sealing rebates of up to $100 when standards are met. The township's oldest settlement, Delta Mills on the Grand River, was first settled in 1836, and the first township hall stood at Delta Center from the 1870s until 1955. Get a free estimate
Delta Township Facts
- Population. Delta Township had 33,119 residents in 2020, the most of any municipality in Eaton County; it counted 15,186 housing units in 2010 (Wikipedia).
- Housing age. In the Waverly area, the median home was built in 1979; only 2.6% of homes date from 1939 or earlier (2019-2023 ACS via Point2).
- Renters. Of 11,368 occupied homes in the Waverly area, 55.7% are owner-occupied and 44.3% rented (2019-2023 ACS via Point2).
- Utility. BWL supplies electricity to Delta Township (Wikipedia) and lists insulation and air sealing rebates of up to $100 when performance standards are met.
- Climate zone. Eaton County is in Climate Zone 5A (OpenEI).

Delta Township Questions
What is the first thing to fix in a 1970s Delta Township house?
Usually the attic floor leaks and the rim joist. Sealing those two areas and adding attic depth tends to give the biggest change in comfort for the money.
Can you insulate the room over my garage in a split-level?
Yes. We fill the floor framing over the garage with foam and seal where the garage meets the house, which also helps keep fumes out.
Does BWL give a rebate for insulation in Delta Township?
BWL lists insulation and air sealing rebates of up to $100 when performance standards are met. Check its current terms before you schedule.
What does it cost to foam a 1970s basement?
National guides put closed-cell foam at about $3.00 to $5.00 per square foot installed, and a rim joist job around $2,000 to $2,500. We measure your basement and write the price.
Do you work in Millett and Delta Mills too?
Yes. We cover the whole township, from Delta Mills on the Grand River to Millett in the southwest corner.
Free Estimates in Delta Township, MI
Delta Township homeowners: request a written estimate.
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