On Time Insulation Services, Inc.

On Time Insulation Services, Inc. is an insulation contractor working out of 48 Morton St in Holliston, and it is one of the rare small MetroWest firms whose credential you can check rather than take on faith: the Massachusetts registry shows Home Improvement Contractor registration 196098 active, held under the exact company name ON TIME INSULATION SERVICES INC. What homeowners hire them for is narrow and consistent — spray foam, blown-in cellulose and fiberglass in attics, basements, crawl spaces and new additions, often with the old insulation pulled out first. The owner, Marco, is named personally in review after review across three platforms, and the praise is unusually specific for a small firm: a 2020 customer described him stopping mid-job when the foam mix was wrong rather than pumping it into the attic anyway; a 2020 attic-and-house-sill job was credited with a measurably cooler house and lower summer cooling costs the following year; a 2022 basement job replaced fiberglass with blown-in foam to the customer's satisfaction; a 2021 job covered rubble foundation walls and cellar ceilings. Several reviewers mention being quoted options rather than one price, and one 2020 reviewer said plainly that Marco's quote was not the cheapest but that he had the highest integrity of those bid. The record's real limitation is its age. Twenty-nine reviews run from 2018 to 2025, but the great bulk are 2018 through 2022; the platform aggregates all sit at 4.9 (HomeAdvisor 24 ratings, Angi 24 ratings, Thumbtack 14), and the Angi and HomeAdvisor pages carry the same reviewers, so the two figures are one review base rather than two. The single 2025 entry describes a project about to start, not one finished. A homeowner should treat the strong reviews as evidence of how this company worked several years ago and ask for recent references. Two dated complaints are worth raising directly. In November 2021 a customer said the crew came on time and the insulation looked well done, but the cleanup left old insulation on the ground and the team was not equipped for a steep driveway, improvising with a neighbour's. A second November 2021 reviewer called the quality good but said scheduling and communication could be improved. Both are mild and neither was disputed, but both are about coordination rather than craft — worth confirming site protection, cleanup and a schedule in writing. On Reddit in February 2026, a commenter answering a Worcester-area spray foam request simply wrote "Call OnTime Insulation" — a bare recommendation with no detail, but a recent one. The right call for a homeowner who wants a small, owner-run insulation crew for a defined attic, basement or crawl-space job and is willing to ask for current references and a written scope.