Attic Insulation Cost Estimator

Attic Insulation Cost

Attic Size:

x ft.

Insulation Type:

Insulation R-Value:

Areas to Insulate:

Needed R-Value:

R-value

US Region:

85609

Low End

Mid Range

High End

Attic insulation costs $2 to $6 per square foot installed, depending on the type, R-value, job size, and complexity. The average cost to insulate an attic is $1,500 to $3,200. Small attic insulation costs start at $700, while insulating large attics costs up to $6,500.

Spray foam offers the best attic insulation performance available. Choose from two types: closed-cell and open-cell, aka 2-pound and ½-pound, respectively. They sport insulation values of approximately R-6.5 and R-3.6 per inch, respectively.

Frequently Asked Questions ( FAQs)

How thick should the insulation be in an attic?

The recommended level for most attics is to insulate to R-38 or about 10 to 14 inches, depending on insulation type.

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What is the safest attic insulation?

Real Wool, Mineral Wool, and Fiberglass Blown-In

Mineral wool and real wool blown-in are less common but are healthier choices.

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Should I remove old attic insulation before adding new?

Expert contractors that specialize in insulation advise that removing old fiberglass insulation is best before installing new cellulose insulation because of possible mildew, mold, or rodent excrement.

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How often should attic insulation be replaced?

However, due to its construction with natural materials, eventually the product will lose effectiveness. Fiberglass insulation typically needs to be replaced 15-20 years into it’s life, as it can easily become dirty, wet, moldy, and ineffective if there’s a roof leak or water damage of any kind.

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Blown-in attic insulation cost

Blown-in insulation costs $960 to $3,800 on average or $0.96 to $2.90 per square foot, depending on the attic size, R-value, and the amount of fixture damming and air sealing needed. Blown-in attic insulation is ideal for most attics because it effectively fills gaps and irregularly shaped areas.

Attic spray foam insulation cost

Attic spray foam insulation costs $2.00 to $5.50 per square foot or $0.80 to $3.90 per board foot, depending on the type, R-value, and job size. Attic spray foam insulation costs $1,400 to $7,300 on average for the floor and $2,000 to $9,500 for the rafters and roof deck.

ATTIC SPRAY FOAM INSULATION COST
Location	Average cost installed
Attic floor	$1,400 – $7,300
Attic rafters/roof deck	$12,000 – $9,500

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Structural insulated panels prices (SIPs)

Structural insulated panels (SIPs) cost $6 to $14 per square foot for the material alone, depending on the thickness. SIPs are large panels – 4′ x 8′ up to 8′ x 24′ – primarily used in new construction but sometimes installed at the rafters when converting an attic to a conditioned space.

An SIP consists of a rigid foam insulation center with a layer of plywood or oriented strand board (OSB) on each side.
SIPs have excellent R-value, soundproofing, and waterproofing properties.

Loose-fill attic insulation cost

Loose-fill attic insulation costs $2.00 to $3.50 per square foot installed on average. Loose-fill insulation is the same material as blown-in, but the labor cost is slightly higher to install.

Loose-fill works best for:

For obstructed or complex spaces
For attics with irregular joist spacing
For topping over existing insulation or filling gaps

Cost factors to install or replace attic insulation

Replacing attic insulation costs $3 to $8 per square foot, including $2 to $4 per square foot to remove the old insulation. Additional costs may be required for air sealing or encapsulating, cleaning, or making repairs in the attic:

Labor

Insulation labor costs $0.70 to $1.60 per square foot, depending on the material, R-value, conditions, and sealing and venting requirements.
Cleaning

Attic cleaning costs $140 to $570+. Costs increase when removing old insulation, relocating items, or addressing mold or pest issues.
Home Age

Older homes typically require more insulation and sealing.
Size

Larger attics require more material and labor. The cost per square foot may decrease on large-scale projects.
Existing Insulation

The current insulation condition impacts the insulation amount needed. Damaged insulation may require removal and replacement.
Roof vent installation costs $250 to $760. Vents exhausting into the attic must be vented outside before installing new insulation.
Roof leak repairs cost $550 to $1,400 on average.

Attic insulation removal cost

Attic insulation removal costs $2 to $4 per square foot on average, depending on the amount and type. Remove old insulation if it has fire, water, or pest damage or if the material is hazardous. Removing insulation also exposes the area to seal all penetrations.

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Process To Get Attic Insulation Cost Estimate Report

Here I am going to share some steps to get your attic insulation cost estimate report.

You need to send your plan to us.

You can send us your plan on info@estimatorflorida.com
You receive a quote for your project.

Before starting your project, we send you a quote for your service. That quote will have detailed information about your project. Here you will get information about the size, difficulty, complexity and bid date when determining pricing.
Get Estimate Report

We do attic insulation cost estimating and prepare a detailed report for your project. At last you finalize the report and finish the project.