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Metro Detroit

Blown in Insulation in Metro Detroit

Compare verified contractors for blown-in cellulose and fiberglass in attics and closed walls. 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

Blown in Insulation in Detroit: what to expect

Blown in insulation in Detroit is loose-fill cellulose or fiberglass installed with a blowing machine, most often on attic floors and sometimes dense-packed into closed walls. It fills around joists, wiring and irregular framing better than batts, which suits the many older bungalows and colonials in Detroit, Livonia, Redford and Troy.

Cellulose is made from recycled paper treated for fire resistance and settles a bit over time; fiberglass loose-fill is lighter and does not absorb water in the same way. Either one works well when the attic is air sealed first, eave baffles protect soffit ventilation, and the installer blows to an even depth with markers you can check.

In walls, installers drill holes from outside or inside and dense-pack the cavity; see wall insulation. Before any attic work, check for vermiculite and treat it as possible asbestos. Compare Detroit insulation contractors for quotes.

What a proper job includes

  • Inspection of the attic or wall cavities and existing material
  • Check for vermiculite, knob and tube wiring and moisture
  • Air sealing of attic bypasses before blowing
  • Eave baffles and a dam around the attic hatch
  • Loose-fill blown to an even depth with depth markers
  • Dense-pack method and hole patching for closed walls
  • Cleanup and a written record of material and coverage

What drives the price

  • Area to cover and target depth
  • Cellulose vs fiberglass loose-fill
  • Attic access and framing obstacles
  • Air sealing done before blowing
  • Dense-pack walls: siding removal, drilling and patching
  • Removal of old or soiled material first
  • Rebate paperwork and any testing

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

Permits and licensing in Michigan

A blown-in attic top-up is often handled without a building permit, but rules vary by municipality and scope, so confirm with the local building department (BSEED in Detroit). Knob and tube wiring should be evaluated by a licensed electrician before insulation covers it. Vermiculite must not be disturbed; any removal belongs with an asbestos contractor licensed through the MIOSHA Asbestos Program.

Paid residential insulation work above a threshold set by state law requires a LARA license: a Maintenance & Alteration Contractor license that lists Insulation, or a Residential Builder license. Check the number on the LARA lookup.

Verify: LARA license lookup MIOSHA asbestos abatement contractor licensing Detroit BSEED How We Vet

How to compare quotes

  1. Ask which material they recommend and why.
  2. Compare installed depth, bag count or coverage in each quote.
  3. Confirm air sealing and eave baffles are included.
  4. Ask how they handle knob and tube wiring or vermiculite if found.
  5. Check the license on the LARA lookup and ask for proof of insurance.

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Common questions

Blown in Insulation FAQ

It depends on the area and depth, cellulose or fiberglass, access, air sealing, whether walls need drilling and patching, and any removal of old material.
Both work. Cellulose is denser and resists air movement a little better; fiberglass is lighter and less affected by moisture. Air sealing first matters more than the choice.
Yes. Installers drill holes between studs, dense-pack the cavity, then patch or replace siding. Wall condition and fire blocking affect how well it fills.
Request quotes from at least two local installers, compare depth and air sealing scope, and check each license on the LARA lookup.

Get blown-in insulation quotes from local pros

Compare Metro Detroit insulation contractors and confirm credentials, scope and cost drivers before you hire.

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