The attic works hardest in both seasons
Attic Air Sealing & Insulation in Olathe, KS
Seal, baffle and insulate to the R-value you pick.
- Free on-site estimates
- Written quote with foam type, depth and R-value for each area
- Attic bypasses, rim joists and moisture checked first
Attic Air Sealing & Insulation, in That Order
Attic air sealing and insulation should happen in that order. In summer, hot attic air pushes into the house through gaps at lights, fans, plumbing and the hatch; in winter, warm air escapes through the same gaps, carrying moisture that can frost the roof deck and feed ice dams. Insulation added without sealing leaves those paths open.
Seal
We close the bypasses at top plates, plumbing stacks, chases, wiring holes, light boxes and bath fans with foam and sealant, and use fire-rated materials at chimneys and flues. The hatch or pull-down stairs get weather-stripping and an insulated cover.
Keep vents open
Baffles at each soffit keep insulation from blocking the intake vents.
Insulate
Olathe's 2018 code lists R-49 for ceilings in zone 4. ENERGY STAR recommends R-60 for an attic starting from nothing 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). Our quote lists the square footage and R-value you need for the application.
What This Covers
Attic work includes.
Air sealing
Foam and sealant at bypasses, top plates and fixtures.
Baffles
Vent chutes at every soffit bay.
Blown-in to depth
Cellulose or fiberglass to R-49 or R-60, with depth markers.
Hatch and stairs
Insulated, weather-stripped access.
Published Attic Air Sealing & Insulation 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) |
From HomeGuide's January 2026 attic guide and Fixr's 2025 spray foam guide. The scope of sealing, depth, access and removal shape the total. We see the attic first, and your written estimate is the price.
How an Attic Job Runs
1. Inspect
Measure depth, find bypasses, check vents and the roof deck.
2. Quote
Sealing and insulation as separate lines with target R-value.
3. Seal and baffle
Close leaks, install baffles, insulate the hatch.
4. Insulate
Blow to depth with markers.
Attic Air Sealing & Insulation Questions
How deep should my attic insulation be?
For R-49 to R-60 with loose fill, usually well over a foot. The quote lists depth and R-value.
Do I need to remove old insulation?
Only if it is wet, moldy or animal-soiled. Dry, clean insulation can stay under the new layer.
Does air sealing qualify for an Evergy rebate?
Evergy's Kansas chart lists $0.04 per square foot for air sealing up to $300. Check the current requirements.
How long does it take?
Most attics take a day.
Attic Air Sealing & Insulation Service Areas
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Get an Attic Air Sealing & Insulation Estimate
Ask for an attic check and written quote.