Foundation Insulation

Foundation Insulation Rebates 75-100% off costs.

Strengthen your foundation with our insulation solutions and find out how to reclaim 75%-100% of expenses via Energize Connecticut, specifically for Eversource and United Illuminating customers.

Proper foundation insulation is essential for structural protection, energy conservation, and maintaining comfortable below-grade rooms. Secure the foundation of your Connecticut home with robust insulation solutions from Home Comfort Practice.

Foundation Insulation Fundamentals

Proper insulation of your foundation is key to maintaining a durable, energy-efficient home. It keeps below-grade rooms comfortable, prevents moisture problems, and minimizes the risks of insect infestation and radon infiltration. Evaluating your Connecticut home’s foundation involves considering the local climate, soil conditions, and moisture levels. It’s essential to identify any existing issues, such as drafts or water intrusion, before selecting an insulation solution.

Construction worker installing styrofoam insulation sheets on house facade wall for thermal protection.

Advantages of Proper Foundation Insulation

Structural Protection: Insulation helps protect the foundation from temperature extremes that can lead to cracking and settling, extending the lifespan of your home’s structural base.

Energy Conservation and Comfort: A well-insulated foundation contributes to reduced heating costs and maintains consistent temperatures in basement or below-grade rooms, enhancing overall comfort.


Frequently Asked Questions about Foundation Insulation

In Connecticut, insulation should typically extend down to the frost line to prevent freezing damage and heat loss.

Yes, interior insulation is commonly added to existing foundations using rigid foam or spray foam. Exterior insulation is more challenging but possible during major renovations or landscaping projects.

While insulation itself does not waterproof a foundation, it can be part of a system that includes proper drainage and waterproofing measures to protect against moisture.

Absolutely. By reducing energy loss and protecting against moisture and temperature fluctuations, foundation insulation can significantly improve your home’s efficiency and durability.

Foundation insulation prevents heat loss, reduces the risk of frost damage, and improves living space comfort, particularly in colder climates like Connecticut.

Common types include rigid foam board, spray foam, and batt insulation. Each type suits different applications and foundation structures.

Yes, both interior and exterior foundation insulation can be added to existing buildings, though exterior insulation may require excavation.

This always depends on the properties of the building however, rigid foam board is typically considered the best option for basement walls due to its moisture resistance and thermal performance. Other moisture resistant solutions such as spray foam may also be effective.

Regular inspections are recommended to check for water intrusion, pest damage, and general wear and tear, especially for exterior insulation.

Energize Connecticut programs offer financial assistance for energy-efficient upgrades including insulation. Our experts can help you qualify.

Foundation Insulation Materials

  • Spray Foam Foundation Insulation

    Spray Foam Foundation Insulation

    Offering excellent moisture resistance and air sealing, spray foam is ideal for insulating foundation walls, especially in existing homes where exterior insulation is not feasible.

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  • Blown Cellulose Foundation Insulation

    Blown Cellulose Foundation Insulation

    Generally not recommended for direct foundation applications due to potential moisture problems unless adequately contained and protected.

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  • Blanket/Batt Foundation Insulation

    Blanket/Batt Foundation Insulation

    While not typically used for direct foundation applications due to moisture concerns, batts and rolls can be applied in interior framing over foundation walls in dry conditions.

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  • Rigid/Foam Foundation Insulation

    Rigid/Foam Foundation Insulation

    A popular choice for both new construction and retrofitting existing homes, rigid foam boards can be applied to the exterior or interior of foundation walls, providing excellent thermal resistance and moisture control.
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Qualify for Foundation Insulation Rebates by Getting a Home Energy Audit


Service Cost (free-of-charge if eligible*)


Average Annual Energy Savings


Weatherization Service Value


Average 1st Year Savings

Rebates for Foundation Insulation


Energize CT Rebate: $1.70 per Square Foot
Avg. Initial Cost $1500-$10000
Max Rebate N/A
Avg. Lifetime Savings $4000

Claim up to $1.70 per square foot on approved insulation projects recommended during a Home Energy Solutions assessment.This may cover between 75-100% of insulation costs!

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IRA Tax Credit: % of Costs
25C Max Credit $1600
25D Max Credit Uncapped

The Inflation Reduction Act tax credit for weatherization in Connecticut offers homeowners a 30% tax credit for eligible projects, with a maximum claim of $1,200 per year. It covers insulation, air sealing, doors, windows, and energy audits. Weatherization reduces energy waste, lowers bills, and improves home comfort while decreasing carbon emissions.

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IRA Electrification Rebate: $1600
Upfront Discount 50%-100% of Costs
Avg. Initial Cost N/A

Connecticut homeowners may be eligible to claim up to $1,600 for their weatherization project through the Inflation Reduction Act Electrification Rebate program, depending on their income. Low-income households can receive 100% coverage of weatherization costs, while moderate-income households can receive 50% coverage. (The total cap for Electrification Rebates across all qualified projects is $14,000.)

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Other Areas to Install Insulation


Want to know about pricing? Get a FREE quote today!

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