Attic Insulation Cost Per Square Foot

Insulation Comparison – Cost & Performance.

When comparing insulation options, cost and performance are important factors to consider. While cellulose insulation may have a slightly higher upfront cost compared to other materials, its long-term performance and energy-saving benefits make it a worthwhile investment.
Wooden roof cellulose insulation

How much does it cost to insulate a 1,000 sq ft attic with R-49 insulation?

Planning a home improvement project includes insulation for sound, temperature, and moisture. Insulation budget considerations should include cost/value ratio and measure performance. R49 is the minimum code for attics in zone 5 which includes parts of the Midwest and Chicago. R38-R49 loose fill fiberglass for example, does not perform well in extreme heat (summer days in Chicago averaging 85-90 degrees) or extreme cold -10 30 degrees ), while spray foam, mineral wool, or loose fill cellulose are all options for the attic floor. This includes air seal, baffles, and hatch cover.
$ icon
Cellulose $3200
$ icon
Fiberglass $2700
$ icon
Spray Foam $8608
Get a Free Consultation
R-value cost per inch, graphics
Cellulose Attic Insulation Costs Per Sq Foot Calculator
Cost for cellulose insulation include
• Attic insulation - $2.30 Per Sq Ft
• Cathedral ceiling insulation - $3.50-5.00 Per Sq Ft
• Flat roof insulation - $3.50-5.00 Per Sq Ft
• Basement insulation - $1.50-4.00 Per Sq Ft
• The exterior wall insulation - $1.50-4.50 Per Sq Ft
• Garage ceiling insulation - $3.50 – 5.00 Per Sq Ft
• Transition wall insulation-$2.50-4.00 Per Sq Ft
• Furnace room insulation - $1.50-4.00 Per Sq
• Crawl space insulation - $2.50-4.50 Per Sq Ft
• Kitchen & bathroom wall insulation - $1.50-4.50 Per Sq Ft
Attic insulation
* Prices are based on the current average cost and may vary based on the scope of work.*
Cellulose loose-fill insulation has a major advantage over batt or spray foam powerful truck-mounted blowing machines blown directly into the stud cavity with the drywall already in place.Advantages: A cost-effective alternative to spray foam when retrofitting building or residential homes. Cellulose is plant-based recycled materials.

Disadvantages: Thermal Bridging
Advantages: Cost. Green Materials. Non-itch.
Toy Houses made of eco materials
Home Insulation Cost Per Sq Ft
On average you can get for $3 per square foot – cellulose r21 / fiberglass r15 or for $4 per square foot – mineral wool r23 spray / foam r21
Spray Foam 1.65 Per Inch X Sq Ft
Cellulose On Attic Floor 2.50 Per Sq Ft
Cellulose Blown In Walls / Ceiling 2-4$ Per Sq Ft
Mineral Wool 4-5$ Per Sq Ft
Fiberglass 1.90-2.40 Per Sq Ft

Insulation materials are produced in a variety of ways using several different material combinations.

Since R-Value is measured in enclosed spaces, any air infiltration into the insulated cavity significantly reduces the intended R-Value.

Why start with the attic?

Achieving results such as comfortable stable home interior temperatures with the desired amount of humidity / dry air. By reaching the recommended home insulation R-Values through thermal performance or R-value of insulation is dependent on proper installation of that material and its interaction with surrounding materials. Comparing insulation cost for 2×6 sidewalls, attic insulation, cathedral ceilings, and basement insulation, we find cellulose is preferred with exception of basement wall insulation.

We install the correct/optimal insulation levels for your attic R60, ceilingR38-60, sidewall R21, basement R13, and crawl space R13-38. Your budget $3 per sq ft for insulation which includes additional considerations. Fire stop and air seal cost an extra .35 cents. Cellulose provides R21 insulation, fills voids and gaps left by fiberglass, performs better in summer, and has better fire resistance, mold mildew and moisture resistance, and is pest resistant.

Insulation labor and material
Fire stop
Air seal
 R-value to code
 Proper ventilation
 Cozy comfortable interior
 Pass occupancy inspections
Get a Free Consultation
Attic Insulation Cost Advantages / Disadvantages
Insulation cost factors measured by R-Value as a key performance indicator.
Spray foam is superior in R-value per inch, making it ideal to choose a combination of closed cell spray foam as the bottom layer and fiberglass batts to fill in the depth of the framing cavity (called the flash and batt method.)Flash and Batt Method is a new hybrid combination of closed cell spray foam and fiberglass batts to reduce costs of labor and materials for spray foam insulation.
Attic Insulation
Areas to Choose Cellulose Over Spray Foam include:

 Cathedral Ceiling
 Attic Duct Work
 Knee Wall
 Vented Attic
 New Construction Sound Dampening
pray Foam Insulation
Spray Foam Insulation Cost
Spray foam insulation cost- spray foam is currently 1.65 per inch. but how many inches are you installing . 3 ” of foam vs 16 inches of cellulose you will get greater heat retention . R60 vs R21 rating for an enclosed space.

Cost per inch of R-Value for an existing cathedral ceiling. Four Considerations are fiberglass batt, loose fill fiberglass, loose fill cellulose, and closed cell spray foam. Cost per inch includes labor, material, installation.

What is the cost of spray foam?
Spray foam in a cathedral ceiling vs 6″ of cellulose. $4.50 R35 with spray foam (benefit more tight). But if you seal the gaps properly with tyvek seam tape. With cellulose gives about R21. $2. If you open the ceiling to spray cost of drywall removal and drywall replaced after spray.
Fiberglass Is Rarely Used Except In Basement Walls.
Green Attic applies spray foam to cathedral ceiling roof rafters, rim joists, and crawl space and basement walls most commonly. Cellulose insulation is used for garage ceilings, exterior and interior walls and ceilings for sound and thermal protection, and attic floors for optimal heat resistance. Fiberglass is rarely used except in basement walls with the paper side facing out towards the living space as a vapor barrier.

Wall insulation 2×6 cellulose stops air 35 % better than fiberglass. its fire retardant and doesn’t require drywall removal for insulation . gaps and cracks in older home lower r value per inch than spray foam . cellulose is cost efficient . lower r value on a 2×4. for the wintertime fiberglass is great because the drywall holds the heat in the room . in the summer time the fiberglass is letting the heat pass through and making the drywall hot.
Basement insulation

Basement Insulation Mind The Moisture Barrier

To choose the best type of insulation, you should first determine the following:
• Who will diagnose the current conditions of the home based on occupants experience with cold or drafty rooms in the winter and hot / humid 2nd floor bedrooms and create an action plan for change? will install the insulation
• What is the reason for choosing to add insulation / ventilation to your attic, exterior walls, garage ceiling, basement, or crawlspace and what are the recommended
R-values for areas you want to insulate.
Where you want improvements on the interior living space( home ) install/add insulation
Why types of insulation Cost Per Inch Vs. R-Value
Get a Free Consultation
Wall insulation

Green Attic Insulation Customer Reviews

Read All Reviews