Efficiency Maine Programs for Mobile Home Insulation

Up to $8,600 in instant rebates

Efficiency Maine's residential insulation rebate program covers insulation and air sealing upgrades — attic, wall, floor/belly, and rim joist work — for homes across the state, including mobile and manufactured homes. For insulation upgrades completed on or after October 1, 2026, the program's maximum rebate increases to up to $8,600, applied as an instant discount at the point of sale through a participating distributor or contractor rather than requiring the homeowner to front the full cost and wait for a mailed check. Eligibility verification is required for at least one homeowner or household member, and only one rebate is paid per upgrade.

The Mobile Home Initiative

Efficiency Maine also runs a dedicated Mobile Home Initiative aimed at income-eligible owners of single-wide manufactured homes that currently heat with propane or kerosene, offering a substantial rebate toward a new ducted heat pump system sized to use the home's existing ductwork and furnace closet. Before that heat pump work can proceed, Efficiency Maine performs a free assessment of the home's suitability — and if the home isn't a good candidate because of excessive heat loss, underbelly damage, or compromised ductwork, the homeowner has the option to use the insulation rebate program first to address those issues, then revisit the heat pump program afterward.

That sequencing matters: it's a direct acknowledgment from the program itself that insulation and air sealing often need to come before a heating system upgrade, not after, particularly on older single-wide homes.

Program rules and material requirements

Efficiency Maine's Home Energy Savings Program (and its low-income counterpart) attach specific technical requirements to the insulation rebate, not just a dollar cap:

• Attic insulation generally must reach a minimum R-value using cellulose, blown fiber, or foam insulation to qualify — batt insulation alone does not meet the program specification.
• Exterior wall cavities generally need to be dense-packed with insulation, filled with foam, and/or covered with a minimum thickness of rigid foam insulation to qualify for the wall insulation rebate.
• Underbelly, crawlspace, and basement-equivalent spaces below a mobile home's conditioned floor are eligible for insulation rebates — but skirting insulation specifically is called out as not rebate-eligible, since skirting isn't part of the conditioned floor assembly itself.
• Most insulation rebates require a prior energy assessment (an “Energy Upgrade Bundle”) unless the home was already weatherized through Efficiency Maine or a Community Action Agency, and all work must be completed by an Efficiency Maine Registered Vendor.
• A Building Performance Institute (BPI)-certified professional generally needs to perform a test-out inspection after the work, confirming the upgrade meets program guidelines.

How the process generally works

How rebate tiers generally work

Efficiency Maine's insulation rebates are typically structured in income-based tiers rather than a single flat amount: a higher percentage of project cost is covered for low-income households, a moderate percentage for moderate-income households, and a baseline percentage available to any Maine homeowner regardless of income. The maximum dollar figure — now up to $8,600 for eligible projects — represents the ceiling reachable under the most generous, low-income tier; homeowners at other income levels should expect a lower percentage of project cost covered, up to that same overall cap. The exact current percentages for each tier are best confirmed directly with Efficiency Maine or a Registered Vendor, since they're periodically revised.

Always confirm current terms before you start

Because rebate amounts, eligible materials, income thresholds, and application steps are all subject to change, the most reliable way to plan a project is to start with Efficiency Maine directly — either through efficiencymaine.com or by calling 1-866-376-2463 — and then work with a Registered Vendor who handles the paperwork as part of the job.