Roof replacement means stripping a roof down to the deck (or in some cases layering over existing shingles, where code allows) and installing a new roofing system: underlayment, flashing, ventilation, and the finish material itself, whether that's asphalt shingle, metal, slate, or flat membrane. Installation covers the same scope on new construction or additions. Either way, it's one of the larger checks a homeowner writes for the house, and it's not a job to hand to whoever answers the phone first. Waterbury's mix of older triple-deckers, mid-century capes, and newer builds means the right crew often depends on your roof's age, pitch, and framing, not just the price quoted.
Before hiring, ask about manufacturer certifications (they affect warranty length), whether the crew pulls permits and schedules inspections, how they handle decking repairs found mid-tear-off, and what happens to the old material. Get the underlayment and ventilation specs in writing, not just "shingle color and brand," since those details drive how long the roof actually lasts.
We score the 30 roofing contractors listed here on factors like licensing, warranty terms, review consistency, and responsiveness, then rank them in our best roofing contractors in Waterbury guide. Our methodology page breaks down exactly how each score is built and weighted.