Spray Foam Insulation in St. Johns, MI

Spray Foam Insulation in St. Johns covers older homes in town and outbuildings in the farm country around it. St. Johns began in 1853 as a planned station on the Detroit and Milwaukee Railway, was settled by 1854, and became the Clinton County seat. The city's oldest brick residence, now the Paine-Gillam-Scott Museum, was built in 1858.

Older in-town homes

Houses near downtown and the old rail corridor tend to be older frame homes with partly insulated walls, thin attic fill and open rim joists. Sealing the attic floor and the rim, then adding depth and filling walls where they are empty, is the usual sequence.

Farms and pole barns

St. Johns calls itself the Mint Capital of the World, and the land around it is farm country. Pole barns, machine sheds and shops are common. Closed-cell foam on steel walls and roofs stops condensation and lets a building hold heat.

Housing

The 2020 census counted 3,545 housing units in St. Johns, with a 2.1% homeowner vacancy rate and 7.1% for rentals.

Historic houses

St. Johns has several Michigan State Historic Sites among its older homes, including the Roswell C. Dexter House and the Henry M. Perrin-Dr. Henry Palmer House. Houses of that age need careful work: walls blown from inside to protect exterior finishes, and foam on sloped ceilings where finished attics leave no room for loose fill.

Basements and crawl spaces

Older St. Johns homes often have a full basement under the main house and a crawl space under a later kitchen or back addition. The basement rim gets closed-cell foam. The crawl gets its vents sealed, foam on the walls and a vapor barrier on the ground, so the floor above stops feeling like it sits over the outdoors.

Code

Clinton County is in Climate Zone 5A. For an addition or a finished basement, check which energy code edition your permit falls under, since Michigan's 2021-based update was paused by the Court of Claims in 2025. Get a free estimate