This is among our favorite questions. Look for a local, certified roofing company that knows what they’re doing, takes care of their customers, who will be around, and has proper insurance and a building license. Roof Worx has premium certifications and mountains of additional training so that we can offer extended warranties. Our certifications include the GAF Master Elite distinction, GAF Master for low-slope, Mulehide single-ply, Versico single-ply, Firestone Metal Roofing, and Durolast PVC single-ply membrane.