Cambridge Insulation Contractor — Spray Foam, Blown-In & Batt Insulation
Boston Smart Plastering installs spray foam, blown-in cellulose, fiberglass batt, and rigid foam insulation throughout Cambridge, MA. Cambridge is a world-renowned urban city directly across the Charles River from Boston — home to Harvard and MIT, a dense mix of historic neighborhoods, and one of the most dynamic renovation markets in New England. Boston Smart Plastering serves Cambridge homeowners, landlords, and property managers across all trades with expertise in the city's unique older housing stock. We assess your home's thermal envelope, identify where you are losing the most heat, and recommend the right insulation solution for each area.
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Massachusetts homes — especially older properties in Cambridge — often have little to no wall insulation and attics that fall far short of today's code requirements. Cambridge's housing stock is dominated by 19th and early 20th century multi-family properties, brownstones, and historic single-family homes throughout neighborhoods like Cambridgeport, Inman Square, and North Cambridge. These older properties require specialized plastering skills, careful drywall work around historic details, and experienced crews who understand historic renovation. Boston Smart Plastering installs all insulation types to current Massachusetts Climate Zone 5 standards, with proper air sealing alongside every project. Cambridge homeowners may also qualify for Mass Save rebates of up to $2,000. Cambridge sits directly north of Boston across the Charles River — just 3 miles from Downtown — making it one of our most accessible and frequently served communities.
Frequently asked questions
How much does insulation cost in Cambridge MA?
Attic blown-in insulation in Cambridge typically runs $1,500–$4,000 for an average home. Spray foam for rim joists runs $800–$2,000. Mass Save rebates may significantly offset the cost for Cambridge homeowners — ask us about eligibility at your free estimate.
Can you insulate existing walls without removing drywall in Cambridge?
Yes. We use a blown-in technique — small holes are drilled, cellulose is blown into the wall cavity, and the holes are patched invisibly. This is particularly valuable for Cambridge's older housing stock near Harvard Square, Inman Square, Central Square, Kendall Square, Cambridgeport, North Cambridge, Porter Square, East Cambridge where opening walls would be disruptive.