Mass Green Insulation

Mass Green Insulation works spray foam, fiberglass, blown-in cellulose, waterproofing, fireproofing, and ROCKWOOL jobs out of Hingham, serving customers across New England. The company says it was established in 2012 and describes itself as family-owned and Latino-owned. On Google, 166 ratings average 4.9, and the review history runs to 111 reviews across five sources dating back to 2021 — a deep sample for a company this size, with an aggregate sentiment score of 0.82 on a −1-to-1 scale across that span. The last six months brought seven more reviews, all positive: a general contractor writing in May said he's used the company 'for several years' and called the crew as efficient as any sub he works with, and a March review named Bruno directly as 'the nicest person to deal with' on a spray foam job. A February review described the installation team protecting an in-progress living-room renovation and clearing out materials afterward — a specific, in-the-house detail that lines up with years of reviews citing punctuality and cleanup. Trade customers — general contractors and home flippers among them — turn up repeatedly across that history, the kind of repeat business a subcontractor earns by being reliable job after job. Two things are worth checking before signing anything. The Better Business Bureau gives Mass Green Insulation an F rating and lists it as not accredited, citing a failure to hold a required competency license — but the state license registry currently shows an active Massachusetts Home Improvement Contractor license (179145) for the company, a direct conflict between two authoritative sources worth asking the company to resolve with paperwork. Separately, an OSHA inspection tied to the company's mailing address recorded eight initial safety violations, five of them still listed as current, with an initial penalty of $60,074 — a workplace-safety record, not a comment on finished work, but relevant for a crew working inside occupied homes. For a straightforward insulation job — spray foam in a renovation, a full retrofit, a new-construction job aiming to pass an energy inspection — the depth and consistency of reviews here is hard to match locally. Ask the company directly for current HIC license documentation given the BBB's conflicting read, and ask about the OSHA violations before booking.