Mid-century Oakland County

Spray Foam Insulation in Southfield, MI

Homes from the 1950s and 1960s suburban build-out, sealed for today's comfort.

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A Suburb Built in Two Decades

Spray foam insulation in Southfield mostly means working on homes from the city's rapid suburbanization in the 1950s and 1960s, which Wikipedia describes as the period when many families moved out from northwest Detroit. Southfield is an inner-ring suburb in Oakland County with 76,618 residents in 2020 and 37,650 housing units, 7.3% of them vacant.

Mid-century construction

Homes from that era usually have some original attic insulation, but well short of what Climate Zone 5A homes need today. Oakland County is in Zone 5A in Michigan's energy code, and the Department of Energy suggests adding R-49 over a few inches of existing attic insulation in Zone 5. Many mid-century houses also have flat or low-slope roof sections, cathedral ceilings in living rooms, or split-level layouts that leave odd attic spaces.

Low-slope roofs and cathedral ceilings

Where there is no room for venting between the ceiling and the roof, closed-cell spray foam can insulate and seal in a thin layer. That usually happens during a re-roof, when the deck can be accessed, or from inside during a remodel. We tell you what is practical for your house.

Split-levels

Split-level homes have several short attic areas, a garage under or beside living space, and rim joists at more than one height. Each needs attention.

Attached garages and bonus space

Mid-century homes often have an attached garage, sometimes with a room above or beside it. The shared wall and the floor over the garage are frequent leaks and cold spots. Closed-cell foam seals and insulates those surfaces in one pass, and it also keeps garage fumes out of living space. We check the door between the garage and the house too.

Older flat-roof additions

Family rooms and porches added in the 1960s and 1970s were sometimes built with flat or nearly flat roofs and almost no insulation. Those rooms are cold in winter and hot in summer. The fix depends on whether the roof is due for replacement.

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What to Know in Southfield

Suburban boom. Southfield saw rapid suburbanization in the 1950s and 1960s as residents moved out from northwest Detroit (Wikipedia).
Housing count. 37,650 housing units in 2020, 7.3% vacant, homeowner vacancy rate 1.4% (Wikipedia, 2020 census).
Code zone. Oakland County is in Climate Zone 5A in Michigan's energy code climate table.

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Southfield Questions

Can you insulate a cathedral ceiling without tearing it out?

Sometimes, with dense-pack through small holes if there is a cavity. Otherwise the best time is during a re-roof, when closed-cell foam or rigid board can go on the deck.

What should I insulate first in a Southfield split-level?

Usually the attic areas and the rim joists, then the floor or ceiling between the garage and living space.

Is there a rebate?

If DTE is your primary heat provider, its 2026 page lists insulation rebates by area. Check the page for current terms.

Can you insulate a flat-roof addition?

Often the best time is during a roof replacement, when insulation can go on the deck. From inside, dense-pack or foam may work if there is a cavity. We look first.

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