DIAMOND FLOORING ( HARDWOOD FLOOR INSTALLATION & REFINISHING)

Diamond Flooring is Andy Nguyen's Dorchester hardwood flooring company, offering installation, sanding, refinishing, repair, and LVP and laminate flooring across dozens of Boston-area towns. The company says it's been doing this work since 2000, and its crew carries BONA Certified Craftsmanship recognition; Thumbtack lists the business at a 4.8-star aggregate from 76 ratings, with Top Pro recognition in 2017, 2019 and 2020, 130 hires, and a background check completed on Andy Nguyen in 2025. The written record on file is thinner than that platform aggregate suggests and runs older: six reviews from 2017 through early 2026, all positive. In a 2019 review, a customer describes Andy returning almost daily to check on a basement floor that was taking longer than usual to dry between coats because of heat and humidity; a 2018 review from a self-described central Massachusetts builder calls the work outstanding and recommends the company for hardwood installation. A 2026 Thumbtack review describes Andy and his team handling both new flooring installation and refinishing in one home. One thing worth confirming directly: two directories — BuildZoom and Thumbtack — both list a Massachusetts home improvement contractor license (#192108) for Andy Nguyen that shows expired since October 2022, with no more recent registry verification on file here. It doesn't necessarily mean the company can't legally operate under a different or renewed number, but it's worth asking about directly before signing a contract. For hardwood flooring work in the Boston area, Diamond Flooring's long history and strong reputation on Thumbtack make it worth a look — just confirm current licensing and get a couple of recent references given how sparse the individually written reviews on file are.