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Mass Save insulation and weatherization contractor
Mass Save insulation and weatherization made simple.
McMahon Insulation helps homeowners cut drafts, improve comfort, and understand Mass Save opportunities with practical insulation and weatherization work across Plymouth, the South Shore, the South Coast, and Cape Cod.
60+ Years of Experience
BPI-Certified & Licensed
Serving Homeowners Since 2007
Licensed & Insured
Covered and ready for residential work across Southeastern Massachusetts and Cape Cod.
BPI-Certified
Qualified for insulation and home performance work.
Registered Contractor
Registered for residential home improvement work in Massachusetts.
Free Quotes
Quick callbacks and straightforward next steps.
Regional Coverage
Serving homeowners across Plymouth, the South Shore, the South Coast, and Cape Cod.
Services
Insulation and weatherization backed by 60+ years of experience.
From insulation and weatherization to spray foam, mold remediation, and supporting repair work, McMahon helps homeowners solve comfort, energy-loss, and moisture issues with a clearer scope from the start.
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Weatherization
Full-Service Weatherization
Air sealing, insulation, and Mass Save guidance for homes losing heat, leaking air, or costing too much to heat and cool.
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Spray Foam
Spray Foam Insulation
Spray foam for attics, crawlspaces, rim joists, and other areas that need stronger air sealing and tighter insulation coverage.
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Mold Remediation
Mold Remediation
Mold-related work when moisture, musty odors, or visible problem areas need direct remediation, not a temporary patch.
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Repair Support
Carpentry & Roofing
Carpentry and roofing support when openings, roof conditions, or related repairs need to be handled alongside the main scope.
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Mass Save Insulation & Weatherization
Mass Save insulation and weatherization support.
Mass Save work can involve a home energy assessment, insulation recommendations, air sealing, rebates, financing options, and no-cost insulation opportunities when the home and program guidelines allow.
- Insulation and air sealing recommendations connected to the home energy assessment.
- Rebates, financing options, and no-cost insulation opportunities depend on the home and current program rules.
- McMahon helps review the recommended scope and explain what work can be completed.
Homeowner Trust
Trusted by homeowners across the South Shore and Cape Cod.
Homeowners call McMahon for insulation, weatherization, spray foam, and mold-related work when they want a direct answer, a clear scope, and work handled by a local team.
See our reviews
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Real Google review excerpt to be added here.
Google review
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Real Google review excerpt to be added here.
Google review
Common Questions
Clear answers to your questions.
McMahon answers common questions about cost, service area, Mass Save, and which type of work fits the home before a quote is scheduled.
Can this work be done at no cost to me?
Some homeowners may qualify for no-cost insulation work and other Mass Save-backed savings depending on the home, the assessment, and current program guidelines.
How does Mass Save fit into the process?
Mass Save can help shape the path through assessment findings, recommended improvements, rebates, and next steps for insulation and weatherization work.
What areas do you serve?
McMahon serves homeowners across Plymouth, the South Shore, the South Coast, and Cape Cod. If you are nearby, call or text to confirm availability.
Do you offer spray foam and mold remediation?
Yes. McMahon handles spray foam insulation and mold-related work when the home needs those services as part of the recommended scope.
How do I get started with a quote or home assessment?
Call, text, or send a quote request with the town, the service you are considering, and a short note about the issue.
Ready To Get Started
Ready to get your project started?
Call, text, or email McMahon with the town, service, and a short note about the issue. We will confirm the scope of work and whether insulation, weatherization, spray foam, mold work, or repair support is the right fit.
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Family-Owned
Local communication from a family-owned insulation and weatherization company.