IECC Climate Zone 5

Insulation Standards for
Boston, MA

Boston's historic homes are notorious for heat loss. Meeting Zone 5 standards (R-60) can drastically improve comfort in drafty rooms.

Advanced ROI Calculator

Calculate savings based on your local climate & energy rates.

Retrofit Target
R-49
Recommended
New Code (2021)
R-60
Strict Standard
Climate Type
Cold (North/Midwest)
Source: DOE / IECC

Estimated Insulation Costs in Boston

Material TypeCost per Sq. Ft.Avg. 1000 sq.ft. Project
Blown-in Fiberglass$2.25 - $3.45$2250 - $3450
Spray Foam (Closed Cell)$5.63 - $8.63$5625 - $8625
Estimates based on Zone 5 material requirements. Local labor rates in MA may vary.

Why Insulation Matters in Boston

Living in Boston means dealing with the specific thermal challenges of Climate Zone 5. According to the 2021 International Energy Conservation Code (IECC), homes in this region require specific thermal protection to maintain efficiency and comfort.

💡 Local Energy Tip

Many homes built before 2010 in the 02108 area typically have insulation levels between R-15 and R-30. Upgrading to R-49 is often the single most effective way to lower your utility bills.

Recommended Materials for Zone 5

  • Blown-in Cellulose: Excellent for filling gaps and settling over existing insulation in older Boston attics.
  • Spray Foam: Provides both high R-value and air sealing, crucial for preventing drafts in Zone 5.

Ready to Upgrade?

Don't guess with your energy bills. We recommend getting quotes from at least 3 licensed insulation contractors in MA to compare pricing.

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