Wall Insulation Guide 2025: Types, Costs & Installation

Wall insulation reduces heating and cooling costs by 15-25% while improving comfort. Understanding wall insulation types, costs, and installation methods helps you choose the right solution for your home.

This comprehensive guide covers wall insulation types, costs, installation methods, and energy savings. Based on data from 1,800+ wall insulation projects, you'll learn how to properly insulate your walls for maximum efficiency.

Why Wall Insulation Matters

Energy Loss Through Walls

Impact: 20-30% of home energy loss occurs through walls

Benefits of Proper Insulation:

• 15-25% reduction in heating/cooling costs
• More consistent temperatures
• Reduced drafts
• Better comfort

Wall Insulation Types

1. Blown-In Insulation

Best for: Existing walls

Pros:

• ✅ Fills gaps and voids
• ✅ Good coverage
• ✅ Good R-value
• ✅ Professional installation

Cons:

• ❌ Requires access holes
• ❌ Settles over time
• ❌ Not DIY-friendly

Cost: $1.50-$2.50 per sq ft R-Value: R-13 to R-21

2. Spray Foam Insulation

Best for: New construction, major upgrades

Pros:

• ✅ Excellent air sealing
• ✅ High R-value
• ✅ Fills all gaps
• ✅ Moisture barrier

Cons:

• ❌ Higher cost
• ❌ Requires professional installation
• ❌ More complex

Cost: $2.50-$4.00 per sq ft R-Value: R-13 to R-21

3. Fiberglass Batts

Best for: New construction

Pros:

• ✅ Lower cost
• ✅ Easy to install
• ✅ Good R-value
• ✅ DIY-friendly

Cons:

• ❌ Can compress
• ❌ Gaps reduce effectiveness
• ❌ Requires careful installation

Cost: $0.50-$1.50 per sq ft R-Value: R-13 to R-19

Wall Insulation Costs

Total Costs

Small Home (1,000 sq ft walls):

• Blown-in: $1,500-$2,500
• Spray foam: $2,500-$4,000
• Batts: $500-$1,500

Medium Home (1,500 sq ft walls):

• Blown-in: $2,250-$3,750
• Spray foam: $3,750-$6,000
• Batts: $750-$2,250

Large Home (2,000+ sq ft walls):

• Blown-in: $3,000-$5,000
• Spray foam: $5,000-$8,000
• Batts: $1,000-$3,000

Getting Expert Wall Insulation Recommendations

Ready to insulate your walls?

Our team provides expert recommendations based on:

• ✅ Your home construction
• ✅ Your budget
• ✅ Your efficiency goals
• ✅ Installation requirements

Get your free wall insulation consultation: Call 877-317-9079 or request online.

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Wall insulation data based on 2025 costs and 1,800+ projects. Individual savings vary by home characteristics and insulation type.