Top of the house, biggest heat loss
Attic Insulation in New Philadelphia, OH
Seal the attic floor, then insulate to the Zone 5A target.
- No-cost estimates at your home, barn or building
- Written price for each space, with material, thickness and R-value
- Leaks, rot and wiring concerns raised before any insulation goes in
Attics That Hold the Heat
Attic insulation is the most common job we do, because heat rises and most older attics in the area are thin. Many hold a few inches of rock wool or settled cellulose, well below the R-49 that Ohio's code lists for Zone 5A ceilings or the R-60 ENERGY STAR suggests for empty attics in existing homes.
Air sealing comes first
Insulation slows heat moving through the ceiling but does little to stop air moving through holes. We seal the gaps first: top plates of interior walls, holes for wires and pipes, chimney and flue chases (with metal and fire-rated sealant), recessed lights, the hatch and any open wall bays.
Then the insulation
On an open attic floor, blown-in cellulose or fiberglass is the usual choice. It fills around joists and wiring and reaches high R-values at modest cost. We leave depth markers. Where the attic holds ducts or a furnace, or the ceiling is vaulted, spray foam on the underside of the roof may be the better option.
Ventilation
Baffles at the eaves keep soffit vents clear. Bath fans should vent outside, not into the attic; we reroute them when needed.
Attic Services
Everything an attic job may include.
Air sealing
Plates, chases, penetrations and hatches sealed.
Blown-in insulation
Cellulose or fiberglass to measured depth.
Roof-deck spray foam
For vaulted ceilings and attics with ducts.
Knee walls
Cape Cod and finished-attic walls sealed and insulated.
Baffles
Soffit vents kept open.
Bath fan venting
Fans ducted outdoors.
Attic Insulation Prices
| 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) |
| 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) |
Taken from HomeGuide's attic guide (January 2026) and Fixr's 2025 spray foam guide. Sealing work, depth, access and removal change the total. We quote after a look in your attic, and the written quote is the price.
How an Attic Job Goes
1. Inspect
Measure, check for leaks and roof stains.
2. Quote
Sealing, insulation and any removal on separate lines.
3. Seal
Leaks closed.
4. Insulate
Blown-in or foam to target depth.
5. Document
Depth markers and photos.
Attic Insulation Questions
What R-value should my attic have?
Ohio's code lists R-49 for Zone 5A ceilings; ENERGY STAR suggests R-60 for an empty attic in an existing home.
Why seal before insulating?
Air leaks carry heat and moisture past insulation. Sealing makes the insulation work.
Can you add insulation over old insulation?
Usually yes, if the old material is dry and clean.
How long does it take?
Most attics are done in a day.
Attic Insulation Service Areas
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Get an Attic Insulation Estimate
We inspect your attic and send a written price.