Stop the leaks overhead
Attic Insulation & Air Sealing in Lawrence, KS
Seal first, then insulate to the R-value you choose.
- Free on-site estimates
- Written quote with material, depth and R-value per area
- Old wiring, moisture and attic bypasses checked before anything is covered
Attic Insulation & Air Sealing for Old and New Homes
Attic insulation and air sealing is the biggest single upgrade for most Lawrence homes. Warm air escapes into the attic in winter through gaps around chimneys, plumbing, lights, fans and the hatch, and in older homes, straight up the open tops of balloon-frame walls. In summer the path reverses and hot attic air leaks down. Adding insulation without sealing those paths leaves most of the problem.
Seal
We close bypasses with foam and sealant, use fire-rated materials at chimneys and flues, and block the open tops of balloon-frame wall cavities.
Baffle
Vent chutes at the soffits keep insulation from blocking intake air.
Insulate
Lawrence's 2018 IECC table lists R-49 for ceilings in zone 4; ENERGY STAR recommends R-60 for an empty attic and R-49 added over 3 to 4 inches. Blown cellulose or fiberglass is the usual way to get there.
Rebates
Evergy's Kansas chart lists $0.04 per square foot for air sealing up to $300 and $0.15 per square foot for R-38 ceiling insulation up to $500, for eligible customers.
What This Covers
Attic work includes.
Air sealing
Bypasses, top plates, chases and fixtures sealed.
Balloon-frame blocking
Open wall tops blocked before insulating.
Baffles
Vent chutes at the soffits.
Blown-in to depth
Cellulose or fiberglass to R-49 or R-60 with markers.
Published Attic Insulation & Air Sealing Costs
| Job | Range and source |
|---|---|
| Attic insulation, average job | $1,000 to $2,700, about $1,800 on average (HomeGuide) |
| Air sealing | $350 to $3,000 (HomeGuide) |
| Blown-in, attic | $0.90 to $2.40 per sq ft (HomeGuide attic guide) |
| Spray foam on the attic floor | $1,100 to $6,800 (HomeGuide) |
| Spray foam on the roof deck | $1,500 to $9,000 (HomeGuide) |
| Spray foam attic, existing home | $2,500 to $12,000 (Fixr) |
| Old insulation removal | $1 to $2 per sq ft (HomeGuide) |
HomeGuide's January 2026 attic guide and Fixr's 2025 spray foam guide are the sources. Sealing scope, depth, access and removal change the total. We price after seeing your attic, and the written estimate is the price.
Attic Steps
1. Inspect
Measure depth, find bypasses and open wall tops, check vents.
2. Quote
Sealing and insulation listed separately.
3. Seal and block
Close leaks, block cavities, install baffles.
4. Insulate
Blow to depth with markers.
Attic Insulation & Air Sealing Questions
Why seal before insulating?
Insulation slows heat but not air. Sealing stops the air that carries most of the heat.
What is balloon framing?
Older framing where wall studs run from the foundation to the roof, leaving cavities open between floors.
Can you blow over vermiculite?
No. Vermiculite should be tested first and removed by an abatement contractor if it contains asbestos.
How long does an attic take?
Most take a day.
Attic Insulation & Air Sealing Service Areas
- Spray Foam Insulation in Lawrence, KS
- Spray Foam Insulation in Eudora, KS
- Spray Foam Insulation in Baldwin City, KS
- Spray Foam Insulation in Lecompton, KS
- Spray Foam Insulation in Perry, KS
- Spray Foam Insulation in Ozawkie, KS
- Spray Foam Insulation in Oskaloosa, KS
- Spray Foam Insulation in McLouth, KS
- Spray Foam Insulation in Tonganoxie, KS
- Spray Foam Insulation in Basehor, KS
- Spray Foam Insulation in Bonner Springs, KS
- Spray Foam Insulation in Ottawa, KS
- Spray Foam Insulation in Wellsville, KS
- Spray Foam Insulation in Overbrook, KS
Get an Attic Insulation & Air Sealing Estimate
Ask for an attic check and written quote.