Updated for the 2026 Efficiency Maine program · Last verified May 2026

Most Maine Homeowners Pay a Fraction of the Full Insulation Cost. Here's the Math.

Efficiency Maine insulation rebates may cover 40–80% of qualifying weatherization work — up to $8,000 depending on income. Mattra Inc. is a registered Efficiency Maine vendor and handles the paperwork.

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Rebate Eligibility

Check Your Insulation Rebate Eligibility

If you are planning insulation or weatherization work, rebates and financing may make the project much more affordable. Mattra helps Maine homeowners understand what may apply to their project, what could lower upfront cost, and what next steps make the most sense.

Start with the Rebate Eligibility Checker to see whether your home and project may connect to insulation rebates in Maine, financing options, or both. It is the fastest way to get clearer direction before you decide how to move forward.

Simple guidance, practical next steps, no pressure

How Efficiency Maine Insulation Rebates Can Help Lower Your Costs

For many homeowners, affordability is the biggest question. The good news is that Efficiency Maine insulation rebates may help reduce the cost of qualifying insulation and weatherization improvements. That can make it easier to move forward with work that improves comfort, efficiency, and overall home performance.

Depending on the project and current program options, homeowners may be able to access meaningful savings. In some cases, rebate opportunities can reach up to $10,000 for qualifying work. The amount depends on the type of work, the home, and the eligibility details, so the best first step is to check what may apply to your situation.

  • Lowering upfront project cost
  • Improving affordability after rebates
  • Making larger insulation upgrades more realistic
  • Supporting weatherization improvements that reduce wasted energy

This page is focused on insulation-specific rebate opportunities, not broad program confusion. If you are comparing insulation upgrades in Maine, this is the right place to start.

Efficiency Maine rebate documentation and savings planning for insulation projects

What Maine Homeowners Actually Pay for Insulation Work

On a typical $10,000 attic insulation and air sealing project, here's what the out-of-pocket cost looks like after Efficiency Maine rebates — and what financing the remainder looks like at Green Bank rates.

Any Income

Project

$10,000

Rebate

$4,000 (40%)

Remaining

$6,000

Optional loan

~$116/mo

5 yrs @ 5.99%

Moderate Income

Project

$10,000

Rebate

$6,000 (60%)

Remaining

$4,000

Optional loan

~$77/mo

5 yrs @ 5.99%

Low Income

Project

$10,000

Rebate

$8,000 (80%)

Remaining

$2,000

Optional loan

~$39/mo

5 yrs @ 5.99%

Illustrative example. Actual rebates depend on project scope, income verification, and current program availability. Program details and incentive amounts are subject to change.

Schedule Your Free Expert Inspection Run your own numbers in the calculator

Three Rebate Tiers, Based on Income

All Maine homeowners qualify for the base tier. Verification may unlock higher tiers. Work must be performed by a registered Efficiency Maine vendor on a year-round principal residence — not new construction or additions.

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$4,000

40% of project cost

All Maine homeowners qualify. No income verification required.

See If You Qualify

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$6,000

60% of project cost

Verification required through Efficiency Maine. Based on Area Median Income thresholds.

See If You Qualify

Start income verification yourself

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$8,000

80% of project cost

Qualifies through HEAP, MaineCare, TANF, SNAP, or tax-assessment criteria. Owner-occupied mobile homes qualify automatically.

See If You Qualify

When Mold and Insulation Work Go Together, Financing Can Cover Both

For homeowners dealing with mold caused by insulation gaps, air leakage, or moisture intrusion, the fix usually requires both remediation and weatherization. This is where the Efficiency Maine Green Bank loan does something most homeowners don't realize is possible.

When mold remediation is required to complete eligible insulation or air sealing work, those mold costs can be financed through the same Green Bank loan as "Other Project Costs" — up to 25% of the total financed amount. Most companies that only do mold can't offer this. Most companies that only do insulation can't address the mold. Mattra Inc. handles both, which means the entire project can move forward under one financing umbrella.

This pathway only applies when the mold remediation is tied to a qualifying weatherization project. It's not a rebate, and it doesn't apply to mold-only jobs. But for the homeowner whose mold issue is rooted in air movement, moisture, and insulation problems, it's often the difference between fixing the symptom and fixing the cause.

Schedule Your Free Expert Inspection

Financing Options That Stack With Rebates

Rebates cover a meaningful portion of qualifying insulation and air sealing work — but not all of it, and not every project fits the rebate-eligible scope. Two financing programs cover the remainder and the work rebates don't reach.

Efficiency Maine Green Bank Loans

  • 0% APR — short-term, 1 year (up to $25,000)
  • 5.99% APR — standard, 5 years (up to $25,000)
  • 7.99% APR — standard, 10 years (up to $25,000)
  • 5.99% APR — income-based, 10 years (up to $7,500)
  • Unsecured — no lien on your property
  • No application fee, no pre-payment penalty
  • Funds disbursed directly to Mattra Inc. at project completion
  • Covers insulation, air sealing, heat pumps, and up to 25% of total for related health and safety work (including mold remediation)
See If a Green Bank Loan Fits Your Project

Learn more at Efficiency Maine

NEIF EnergyPlus Loans

  • $2,500 to $35,000 financed (up to 100% of project)
  • Fixed rate, fixed monthly payment — no adjustable rates
  • Unsecured — no lien on your property
  • Covers what Efficiency Maine doesn't: windows, doors, roofing, siding, electrical, plumbing
  • Eligible for primary residences and vacation homes (1–4 units, permanent foundation)
  • Mattra Inc. is a NEIF-approved contractor
  • Instant credit decision available
See If NEIF Financing Fits Your Project

View Mattra on NEIF's contractor list

Some projects use both: Efficiency Maine rebates to reduce the insulation cost, a Green Bank loan for the remaining insulation balance, and NEIF for windows, doors, or roofing tied to the same project. The right combination depends on the scope — we'll walk through it during the free expert inspection.

How Mattra Inc. Walks You Through Rebates and Financing

1

Free Expert Inspection

Our expert inspector visits your home, looks at what's going on, and gives you an honest read. No diagnostic tools at this stage — just a visual assessment and an educational conversation. If a full energy audit would help clarify scope, we'll say so.

2

Tier Review

We help you understand which rebate tier you may qualify for and what verification Efficiency Maine requires. Run the numbers in the calculator

3

Paperwork Handled End to End

We submit the Energy Upgrade Bundle, the rebate claim, before-and-after blower door tests, and all required forms directly to Efficiency Maine. You sign what needs signing. We handle the rest.

4

Financing Coordinated

If a Green Bank or NEIF loan is part of the picture, we coordinate the application and disbursement so your project doesn't stall while paperwork moves. See financing options

Schedule Your Free Expert Inspection

Estimate Your Rebate Before You Schedule

Plug in your project to see what rebates may apply at each income tier. Then schedule the inspection to confirm scope.

Use the full rebate calculator to estimate your savings at each income tier and project size.

Open the Rebate Calculator

Common Questions About Efficiency Maine Rebates and Financing

Efficiency Maine offers rebates covering 40% of project cost (up to $4,000) for all homeowners, 60% (up to $6,000) for moderate-income households, and 80% (up to $8,000) for low-income households on qualifying insulation and air sealing work. Mattra Inc. is a registered Efficiency Maine vendor and handles the application process for you.

All Maine homeowners qualify for the base 40% rebate (up to $4,000) on qualifying insulation and weatherization work, regardless of income. Higher rebate tiers of 60% (up to $6,000) and 80% (up to $8,000) are based on household income. The project must be completed by a registered Efficiency Maine vendor and include before-and-after blower door testing to document the improvement.

Yes. We handle the full rebate application process — before-and-after testing, documentation, and submission. You don't need to navigate the program on your own. Many of our customers have been surprised at how much of the project cost was covered once rebates were applied.

Yes. In addition to Efficiency Maine rebates, financing is available through the Efficiency Maine Green Bank (0%–7.99% APR, up to $25,000) and the National Energy Improvement Fund (NEIF EnergyPlus loans up to $35,000). The Green Bank loan covers insulation, air sealing, and up to 25% of project cost for related health and safety work like mold remediation. NEIF covers a broader scope including windows, doors, and roofing tied to the project. Mattra Inc. is registered for both.

Processing times vary, but most rebates are issued within four to eight weeks after the completed application and documentation are submitted. Mattra Inc. submits all documentation promptly after project completion.

Ready to Get Started?

Schedule a free expert inspection to walk through rebates, financing, and next steps.

Schedule Your Inspection

Call (207) 777-6020 for immediate assistance.

Related Services and Tools

Insulation Services

Find the right insulation approach for your home — attic, wall, basement, or whole-home weatherization.

View All Insulation Services

Energy Audit

A full diagnostic with blower door testing and thermal imaging to identify where your home is losing energy.

Schedule an Energy Audit

Blower Door Testing

Standalone air leakage testing to quantify how leaky your home is and where the leaks are.

Book a Blower Door Test

Attic Insulation

The highest-impact starting point for most Maine homes. Stop losing heat through the roof.

See Attic Insulation Options

Find Out What Your Project Actually Costs After Rebates

The fastest way to know what your project costs after rebates is to schedule a free expert inspection. Our expert inspector will walk through what your home needs, what rebate tier may apply, and whether financing makes sense for the remaining balance. No pressure, no diagnostic equipment — just an honest read.

Schedule Your Free Expert Inspection Call (207) 777-6020

Or run the rebate calculator first

Program details and incentive amounts are subject to change. Eligibility depends on project scope, income verification, and current program availability.