Flat and low-slope commercial roofing is a different trade from residential shingle work. It covers membrane systems like TPO, EPDM, and modified bitumen, along with built-up roofing, coatings, and the drainage and flashing details that keep water off warehouses, retail strips, multi-unit buildings, and office roofs along the New London waterfront and inland business corridors. We've identified 11 contractors in the area who handle this type of work, ranging from small crews doing repairs and coatings to larger outfits that take on full tear-off and re-roof projects.
Before hiring, ask about the specific membrane systems a contractor installs and whether they're a manufacturer-certified installer, since that certification often extends the warranty coverage on materials. Get a written scope that spells out insulation, drainage slope, flashing at parapets and penetrations, and cleanup. Commercial jobs should include proof of liability insurance and workers' comp, and a contractor who's used to coordinating with property managers or working around active businesses is worth more than one offering the lowest bid alone.
Our scoring weighs licensing and insurance status, the range of systems a company actually installs, how they handle warranty and follow-up work, and patterns in customer feedback specific to flat roof projects rather than general remodeling reviews. For the full ranked breakdown of every roofing contractor we cover in New London, including this category, see our best roofing contractors guide. Details on how we score and verify each business are on our methodology page.