Preston Construction & Spray Foam

Preston Construction & Spray Foam is a Concord/Allenstown, New Hampshire contractor run by owner Warren Preston, in business since 1995. The company's name-brand work is spray foam insulation — injectable wall foam, open and closed cell foam — alongside ADA accessibility work (ramps, bathroom and kitchen remodeling) and general remodeling projects like decks, additions and attic or basement conversions. In reviews from 2023 to 2025, homeowners have repeatedly praised the crew for showing up on time, responding quickly to quote requests, and completing insulation and remodeling jobs — a crawl space insulation project, an injectable-foam job, an ADA ramp — to a high standard, with several saying they'd hire again. That positive pattern sits alongside a documented complaint: the Better Business Bureau rates the business C-, citing an unresolved complaint, and a 2023 review described a project still unfinished well past its promised September completion date. Anyone booking should ask directly about current project timelines and get a firm completion date in writing. The business is not BBB accredited.