How Much Does Wall Insulation Cost? Factors That Affect Pricing

Monday, 07/7/2025

Discover how much wall insulation costs with FUNAS. Explore key factors affecting pricing, including material, installation, and home size. Get expert insights to plan your budget effectively. Learn more about wall insulation costs today with FUNAS—your trusted partner for energy-efficient solutions.

 

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The cost of wall insulation can vary widely based on several factors, including the type of insulation, the size of the area to be insulated, and the labor involved. Here's a general breakdown:

1. Type of Insulation:

  • Fiberglass Batts or Rolls:
    • Cost: $0.50 - $2.00 per square foot (material only)
    • Installation: $1.00 - $2.50 per square foot
    • Fiberglass batts are among the most common and affordable options. They are easy to install and often come in pre-cut rolls for easy application in walls, ceilings, and attics.
  • Spray Foam Insulation:
    • Cost: $1.00 - $3.00 per square foot (material only)
    • Installation: $2.00 - $5.00 per square foot
    • Spray foam provides superior thermal resistance and seals gaps better than other options. It can be more expensive but is effective for both insulation and air sealing.
  • Blown-In Cellulose Insulation:
    • Cost: $0.60 - $2.00 per square foot
    • Installation: $1.00 - $3.00 per square foot
    • This option involves spraying loose cellulose material into the cavity of your walls. It's a good choice for retrofit applications where other forms of insulation might be too invasive.
  • Rigid Foam Board Insulation:
    • Cost: $0.75 - $2.00 per square foot
    • Installation: $1.00 - $3.00 per square foot
    • Rigid foam board provides high insulation values and is often used in areas prone to moisture, like basements or exterior walls.
  • Mineral Wool or Rock Wool:
    • Cost: $0.75 - $2.00 per square foot
    • Installation: $1.50 - $3.00 per square foot
    • Rock wool is fire-resistant, soundproofing, and provides excellent thermal insulation, though it can be more expensive than fiberglass.
     

2. Labor Costs:

Labor costs depend on your location, the complexity of the installation, and the type of insulation being installed. On average, installation labor can add $1.00 - $5.00 per square foot to the total cost.
  • Basic labor: For basic fiberglass batt installation, labor can be around $1 - $2 per square foot.
  • Spray foam or blown-in insulation: Because these methods are more technical, labor can run from $2 - $5 per square foot.
 

3. Additional Costs:

  • Vapor Barrier Installation: If you require a vapor barrier, this can add an additional $0.50 - $1.00 per square foot.
  • Removal of Old Insulation: If you need to remove old or damaged insulation, expect an additional cost of $0.50 - $1.50 per square foot for labor and disposal.
 

4. Average Cost for a 1,000 Sq. Ft. Wall:

  • Fiberglass batt insulation: $1,000 - $2,500 (including material and labor)
  • Spray foam insulation: $2,000 - $6,000 (including material and labor)
  • Blown-in insulation: $1,500 - $3,000 (including material and labor)
 

5. Factors that Affect Cost:

  • Wall Accessibility: If your walls are hard to reach or require significant preparation, the cost could increase.
  • Energy Efficiency Goals: Higher R-value insulation materials (which offer better thermal resistance) will cost more, but will save money in the long run through reduced energy consumption.
 

Conclusion

On average, the cost of wall insulation typically ranges between $1.00 - $5.00 per square foot, depending on the type of insulation, labor, and any additional materials like vapor barriers. When budgeting for insulation, it’s important to balance upfront costs with long-term energy savings. If you're interested in improving energy efficiency and lowering heating/cooling costs, investing in higher-quality insulation may offer the best long-term value.
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