Colt Home Services

Colt Home Services runs Mass Save energy assessments and insulation work out of Waltham, and the reviews return again and again to one inspector by name: Joe Frasso, credited by dozens of homeowners for walking through a home's insulation, heating and air-sealing needs without any high-pressure sales pitch. The company describes itself as employee-owned and a certified Mass Save program participant, and its website also lists residential plumbing work — repairs, water heaters, leak detection, repiping and boilers. The assessment itself is what people praise most: a thorough walk-through, clear photos and explanations, and — more than once — same-day booking of the actual insulation install. One customer's 1932 home turned out to have no insulation in its exterior walls at all, something the team found and documented with photos. Installers like Jacky and Justin get called out by name for clean, efficient work on garages and attic spaces, and one customer had six new thermostats installed as part of a broader energy upgrade. A few things are worth knowing before booking. Two March 2026 reviews describe real friction reaching the company after the initial visit — one customer says ten calls over two days went unanswered when trying to get a copy of a loan intake form, and another had a confirmed appointment simply not happen, with no word until they called to ask. In a November 2025 review, a customer whose house has brick exterior walls said the crew drilled interior holes for insulation but skipped actually pumping material into some of them, catching it only after the fact. For a Massachusetts homeowner looking to use the Mass Save program for insulation or an energy audit, Colt is worth calling given how consistently the assessment itself is praised — just confirm any post-visit paperwork or follow-up requests get a clear point of contact, since a few customers had trouble reaching anyone after the first appointment.