Fewer icicles, warmer ceilings
Attic Air Sealing & Blown-In Insulation in Grand Rapids, MI
Seal first, then fill to depth, so the heat stays in the house instead of melting snow on the roof.
- Free on-site estimates across Grand Rapids and Kent County
- Every area itemized with foam type, thickness and R-value
- Leaks, damp framing and old wiring pointed out before we insulate
Start at the Top of the House
Attic Air Sealing & Blown-In Insulation is the job we recommend first in most Grand Rapids homes, because the attic is where warm air leaves fastest. Heat rises and slips through every gap in the ceiling: plumbing vents, wiring holes, bath fans, light fixtures, chimney chases and the attic hatch. Loose insulation does not stop that air. The gaps have to be sealed, and then the attic floor gets filled to the right depth.
Why ice dams form here
Grand Rapids gets about 75.6 inches of snow in an average year, much of it lake-effect, and the temperature drops below freezing on roughly 138 nights. When warm air leaks into the attic it melts the snow from underneath. The water runs to the cold eaves, refreezes and builds an ice dam that can push water under the shingles. Frost on roofing nails and dark stains on the decking point to the same air leaks. Sealing and insulating the attic floor deals with the cause.
How deep is deep enough
Kent County is in Climate Zone 5A. The U.S. Department of Energy recommends R-60 for an uninsulated attic in that zone, or adding R-49 over 3 to 4 inches already in place. DTE's rebate page notes R-38 as a minimum for most attics, and its rebate is paid on area insulated. In older city houses we often find a few inches of settled fill. We measure what you have and write the target depth on the estimate.
Blown-in cellulose or fiberglass
For an open attic floor, the standard plan is to seal the bypasses with foam and caulk, set baffles at the eaves so the roof stays vented, and blow in cellulose or fiberglass to depth. It is usually the least expensive way to reach a high R-value. Depth rulers stay in the attic so you can check it.
When old insulation comes out
Insulation that is wet, moldy, full of rodent droppings or blocking the air sealing has to be removed first; dry, clean fill can stay and be topped up. Gray-brown, pebbly loose fill may be vermiculite, which should be tested before anyone disturbs it. If testing shows asbestos, removal is a job for an abatement contractor, and we schedule our work after theirs.
Rebates
DTE lists a $600 rebate for insulating at least 500 square feet of attic in homes it heats, plus a $250 bonus when attic insulation is paired with another listed measure installed between September 15 and December 15, 2026. Consumers Energy lists $125, $175 or $200 for gas and combination customers depending on whether the final attic reaches R-48 or less, R-49 to R-59, or R-60 and up. We record the area and final R-value for your forms.
Call (616) 219-1886 or book a visit and we will measure your attic and tell you what it needs. Get a free estimate
What This Covers
What an attic job includes.
Bypass sealing
Foam and caulk around vents, wires, chases, fans and top plates.
Blown-in cellulose or fiberglass
Loose fill to R-49 or R-60 over a sealed floor.
Eave baffles
Kept open so the roof deck stays vented and dry.
Hatch and pull-down stairs
Insulated, weatherstripped covers.
Old insulation removal
Wet, dirty or rodent-damaged fill vacuumed out before new goes in.
Kneewall attics
Sealing the side pockets of story-and-a-half homes.
Attic Insulation Cost Ranges
| Job | Range and source |
|---|---|
| Attic insulation, average job | $1,000 to $2,700, about $1,800 average (HomeGuide) |
| Air sealing | $350 to $3,000 (HomeGuide) |
| Blown-in, attic | $0.90 to $2.40 per sq ft (HomeGuide attic guide) |
| Blown-in attic, about 1,500 sq ft | $1,750 to $5,500 (Fixr) |
| Spray foam on the attic floor | $1,100 to $6,800 (HomeGuide) |
| Spray foam on the roof deck | $1,500 to $9,000 (HomeGuide) |
| Old insulation removal | $1 to $2 per sq ft (HomeGuide) |
These come from HomeGuide's attic guide (January 2026) and Fixr's blown-in guide (August 2025) and are national. How much sealing your attic needs, how deep we go, access and any removal decide the real cost. You get a written estimate after we measure, and that written figure is the price.
How It Works
1. Measure
We check depth, condition, air leaks, ventilation and signs of roof trouble.
2. Plan
You get the sealing scope, material, target R-value and price in writing.
3. Seal and baffle
Bypasses are sealed and baffles set before any fill goes in.
4. Blow to depth
Fill goes in to the written depth, with rulers left so you can check.
Attic Air Sealing & Blown-In Insulation Questions
What is the attic insulation code in Michigan?
For new homes, Michigan's energy code sets ceiling insulation by climate zone, and the 2021 IECC the state has been adopting calls for R-60 in Zone 5. Existing homes do not have to be upgraded, but the Department of Energy recommends R-60 for an empty Zone 5 attic.
Will attic insulation stop ice dams?
Sealing and insulating the attic floor removes most of the warm air that melts roof snow, which is the main cause. Roof shape and ventilation matter too, so we check both.
Cellulose or fiberglass?
Both work over a sealed floor. Cellulose is denser and resists air movement a little better; fiberglass is lighter. We tell you which we plan to use and why.
How long does an attic job take?
Most attic sealing and blow-in jobs take about a day. Removal of old insulation can add time.
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Get an Attic Air Sealing & Blown-In Insulation Estimate
Book a free attic check in Grand Rapids.