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What is the cost per sq ft of attic insulation

Attic Insulation Cost 1

Attic Insulation Cost

A healthy home starts with choosing green building materials.

Choose from many types of insulation.

Common housing or remodeling materials may contain toxins, chemicals, or harsh substances that may harm your health. 

Insulation is no different. VOCs found in polyurethane spray foam insulation. Formaldehyde found in rigid foam.

Attic insulation cost considerations include 

  • Performance of project vs intentions / planned results 
  • R-Value / Total Resistance Value of Heat Movement Between Materials 
  • Ventilation / Healthy Air Intake – vented space attic / crawlspace / mechanical room 
  • A great pressure barrier for the living space ( prevent escape of conditioned air ) 
  • Eliminating drafts / cold spots in winter 

So you start a google search for insulation… what comes up 

  • spray foam insulation
  • spray foam insulation cost
  • spray foam insulation kit
  • spray foam insulation near me
spray foam google search results april 2021 chicago illinois

What exactly is the cost of performance? based on r-value or something else? 

Green Attic  also offers green alternative insulation with superior r-value and superior cost vs. performance indicators? 

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

Compare insulation costs. How much R-value can you get for $3 per square foot. Cellulose R21 Fiberglass R15 How much R-value can you get for $4 Mineral Wool R23 Spray Foam R21

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

Fix My Attic : Achieving results  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. 

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

Fiberglass fails to provide air infiltration protection. 

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
Attic Insulation Cost 2

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 Cost 3

Areas to Choose Cellulose Over Spray Foam include

  • cathedral ceiling
  • attic duct work
  • knee wall 
  • vented attic 
  • sidewall
  • new construction sound dampening
Attic Insulation Cost 4

Spray Foam Insulation Cost

Spray foam insulation cost- spray foam is greater per inch. but how many inches are you installing . if you put 3 ” of foam , then 16 inches of cellulose you will get greater heat retention . R60 vs R21 rating for an enclosed space. 

Blown in insulation cost 

Price for r21 r39 r60 R value is ultimately what determines comfort, heat retention, and performance for your home. 

Material Comparison R-Value $ cost fiberglass / cellulose/ spray foam

insulation cost r value cost per inch insulation contractor chicago spray foam cost vs cellulose vs fiberglass comparison insulator contrator sprayfoam

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. 

what is the cost of cellulose? 

Insulation Cost of Spray Foam Cellulose Fiberglass

10 questions to ask your insulation estimator

How do we determine cost/value ratio and how do we measure performance?

R49 is minimum code for attics in zone 5 which includes parts of the Midwest and Chicago.

R38-R49 does not perform well in extreme heat ( summer days in Chicago averaging 85-90 degrees ) or extreme cold -10 30 degrees ) 

Cost to  insulate an attic R-49 in per 1000 sq ft 

This includes air seal, baffles, and hatch cover. 

new construction insulation cost calculator spray foam cost cellulose cost per sq ft.
Insulation Cost Calculator Fiberglass Spray Foam Cellulose
Cost Per Inch R-Value r value loose fill cellulose fiberglass spray foam insulation thermal resistance home contractor green attic insulation

wall insulation 2×6 cellulose stops air 35 % better than fiberglass. its fire retardant and doesnt 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. 

Chicago Climate basement insulation prefers fiberglass

Green Attic Insulation is an expert attic insulation services contractor specializing in cathedral ceilings. Cost for home insulation services include

  • Price for attic insulation – $2.30 Per Sq. Ft
  • Price for 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.
  • 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. Ft.
  • crawl space insulation $2.50. – 4.50 Per Sq. Ft.
  • kitchen and bathroom wall insulation $1.50. – 4.50 Per Sq. Ft.

Prices are based on current average cost. Price may vary based on 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 


Green Materials  Toxic Chemicals

Attic Insulation Cost 5
dense pack garage ceiling cellulose insulation
Attic Insulation Cost 6
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green attic insulation air seal baffles solar fan pest removal mold treatment ice dam prevention

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