Wall Insulation: Maximize Energy Efficiency & Comfort in Your Home

Insulating your walls is one of the most effective ways to reduce energy costs and maintain a comfortable indoor temperature year-round. In this guide, we’ll explore the benefits of wall insulation, compare different insulation types, and help you choose the best solution for your home.

Why Is Wall Insulation Important?

Without wall insulation, your home loses valuable heating and cooling through exterior and interior walls. Proper insulation:


  1. Reduces Energy Costs – Less heat escapes in winter and less heat enters in summer.
  2. Improves Comfort – Maintains consistent indoor temperatures.
  3. Enhances Soundproofing – Reduces noise between rooms and from outside.
  4. Prevents Moisture Issues – Minimizes mold growth and air leaks.


If your home feels drafty or your energy bills are high, upgrading your wall insulation could be the solution!

Best Types of Wall Insulation

Depending on whether you’re insulating exterior or interior walls, different materials may work best.

Insulation Type R-Value per Inch Air Sealing Moisture Resistance Best For
Spray Foam Insulation 6.0 – 7.0 Excellent Excellent Exterior & interior walls
Fiberglass Batt Insulation 2.9 – 3.8 Poor Poor Interior walls, new construction
Blown-In Fiberglass Insulation 2.2 – 2.7 Moderate Moderate Retrofits, hard-to-reach spaces
Cellulose Insulation 3.2 – 3.8 Moderate Moderate Soundproofing, eco-friendly option
Foam Board Insulation 4.5 – 5.0 Good Good Basement walls, exterior sheathing

Best Choice: Spray foam insulation provides superior energy efficiency and air sealing for wall insulation.

Interior vs. Exterior Wall Insulation

Interior Wall Insulation

  • Improves soundproofing between rooms.
  • Best for multi-family homes or shared walls.
  • Fiberglass insulation or cellulose insulation works well.

Exterior Wall Insulation

  • Reduces heat loss and air infiltration.
  • Best for new homes or remodeling projects.
  • Spray foam insulation or foam board insulation is ideal.


Pro Tip: If you’re insulating an existing wall, blown-in insulation is a cost-effective option without requiring major renovations.

How Much Does Wall Insulation Cost?

Insulation Type Estimated Cost per Sq. Ft.
Spray Foam Insulation $1.50 – $3.50
Fiberglass Batt Insulation $0.50 – $1.25
Blown-In Fiberglass Insulation $1.00 – $2.00
Cellulose Insulation $0.80 – $1.50
Foam Board Insulation $1.00 – $2.50

💰 Tip: Check for insulation rebates from your local energy provider to save on costs!

Signs You Need to Upgrade Your Wall Insulation

  • Your energy bills are higher than usual.
  • Walls feel cold in winter and hot in summer.
  • You hear outside noise too easily.
  • Your home is drafty even with doors and windows closed.


If you notice any of these issues, it’s time to improve your wall insulation!

Get Expert Wall Insulation in Arvada!

Upgrade your home's efficiency with high-quality wall insulation from Arvada Insulation Contractors. Our experts provide custom insulation solutions that improve comfort and lower energy costs.


Call (720) 709-1680 now or fill out our online form for a FREE consultation today!

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