Attic Insulation Cost Comparison: 4 New Better Life Changing Material

Choosing the right attic insulation involves balancing cost and performance, with options ranging from $2,700 to $8,600 per 1,000 square feet. Modern alternatives like cellulose and spray foam offer superior benefits over traditional fiberglass in extreme conditions.
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Written byย 
Dumitru Nicolaescu
Updated:
October 24, 2024

Attic Insulation Types and Costs Comparison

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Cost to ย insulate an attic R-49 in per 1000 sq ft
  • Cellulose $3200
  • Fiberglass $2700
  • Spray foam $8608

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insulation comparison chart
insulation comparison chart

Cellulose Insulation Costs Per Sq Foot Calculator

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  • Attic insulation............................$2.30 Per Sq. Ft.
  • Cathedral ceiling insulation.......$3.50 โ€“ 5.00 Per Sq. Ft.
  • Flat roof insulation......................$3.50 โ€“ 5.00 Per Sq. Ft.
  • Basement insulation...................$1.50 โ€“ 4.00 Per Sq. Ft.
  • The exterior wall insulation........$1.50 โ€“ 4.50 Per Sq. Ft.
  • Garage ceiling insulation............$3.50 โ€“ 5.00 Per Sq. Ft.
  • Transition wall insulation............$2.50 โ€“ 4.00 Per Sq. Ft.
  • Furnace room insulation.............$1.50 โ€“ 4.00 Per Sq. Ft.
  • Crawl space insulation...............$2.50 โ€“ 4.50 Per Sq. Ft.
  • Kitchen wall insulation................$1.50 โ€“ 4.50 Per Sq. Ft.
  • Bathroom wall insulation............$1.50 โ€“ 4.50 Per Sq. Ft.

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Insulation cost per sq ft

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  • 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

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Why start with the attic?

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

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Feature 3 Jpg
  • Insulation labor and material
  • Fire stop
  • Air seal
  • R-value to code
  • Proper ventilation
  • Cozy comfortable interior
  • Pass occupancy inspections

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Attic Insulation Cost Advantages / Disadvantages

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Flash and Batt Method
Flash and Batt Method

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  • Cathedral ceiling
  • Attic duct work
  • Knee wall
  • Vented attic
  • Sidewall
  • New construction sound dampening

Spray Foam Insulation Cost

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Fiberglass is rarely used except in basement walls.

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Basement Insulation - Mind the Moisture Barrier

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  • 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 ย 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 ย walls, garage ceiling, basement, or crawlspace and what are the recommended R-values for areas you want to insulate.
  • Where ย you want improvements on the interior living space (home) ย install/add insulation.
  • Why types of insulation Cost Per Inch Vs. R-Value.

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