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Metro Detroit

Exterior Insulation in Metro Detroit

Compare verified contractors for rigid foam and insulated siding installed during a re-side. Get free quotes, check licenses, and hire with confidence.

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Local to Metro Detroit: Detroit, Wayne, Oakland, Macomb and more
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Before you hire

Exterior Insulation in Detroit: what to expect

Exterior insulation in Detroit is usually added when a house is re-sided: once the old siding is off, a contractor can install rigid foam board over the sheathing, or use insulated vinyl siding with a foam backer. Many older homes in Detroit, Ferndale, Royal Oak and Dearborn have little or no insulation in the walls, so a continuous layer outside the studs can cut drafts and cold spots.

Adding thickness to the wall changes the details. Window and door trim, sills and the roof edge need extensions or new flashing so water still drains to the outside. The foam, tape and house wrap must be lapped in the right order, and fasteners must be long enough to reach framing. Getting this wrong traps water behind the siding.

If you mainly want warmer walls without re-siding, compare wall insulation blown in from outside or inside. See all Detroit siding contractors for full re-side projects.

What a proper job includes

  • Check of existing wall assembly and sheathing after tear-off
  • Rigid foam board or insulated siding sized to the project
  • Seams taped and a water-resistive barrier lapped correctly
  • Window and door jamb extensions or new trim details
  • Flashing at sills, heads and the roof-to-wall joint
  • Fasteners long enough to reach framing through the foam
  • Siding installed over the new layer with proper clearances

What drives the price

  • Foam type and thickness, or insulated siding product
  • Wall area and number of stories
  • Number of windows and doors that need trim extensions
  • Sheathing repairs found after tear-off
  • Siding material installed over the insulation
  • Complex rooflines, bump-outs and porches

Rebuild Detroit does not publish price ranges. Get written quotes for the same scope and compare.

Permits and licensing in Michigan

Because exterior insulation is normally part of a re-side, it may fall under a building permit depending on the municipality and scope, and energy code details can apply. Confirm with the local building department (BSEED in Detroit). On homes built before 1978, a firm paid to disturb more than 20 square feet of exterior paint must be EPA RRP certified, follow lead-safe work practices, and give you the EPA Renovate Right pamphlet before work starts.

Paid residential work above a threshold set by state law requires a LARA license. Look for a Maintenance & Alteration Contractor license that lists Siding, or a Residential Builder license, and check the number on the LARA lookup. Insulation work is its own Maintenance & Alteration trade, so ask which trades the license lists.

Verify: LARA license lookup EPA lead-safe renovation (RRP) rules Detroit BSEED How We Vet

How to compare quotes

  1. Ask what product, thickness and facing they plan to use, and why.
  2. Ask how they will handle window and door trim with a thicker wall.
  3. Get the layer order in writing: sheathing, foam, barrier, siding.
  4. Check the license on the LARA lookup and ask for proof of insurance.
  5. Ask whether any utility energy rebates apply and who files them.

Ready to get started?

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Common questions

Exterior Insulation FAQ

It is usually the most practical moment to add it, since the old siding is already off. Whether it pays off depends on your existing wall insulation, heating costs and how long you plan to stay.
Cost depends on the foam type and thickness, wall area, the number of windows and doors that need new trim details, sheathing repairs, and the siding going over it. Ask for quotes that list the insulation separately.
No. Insulated vinyl has a contoured foam backer attached to each panel. Rigid foam is a separate continuous layer under any siding type. Ask each contractor to explain the tradeoffs for your house.
It can if the water-resistive barrier and flashing are installed out of order. A careful installer laps every layer so water drains outward and leaves room for the wall to dry.

Get exterior insulation quotes from local pros

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