Thermo-Seal is Farmingdale’s trusted exterior remodeling company, specializing in window replacement, siding installation, roofing, doors, and gutters. Serving Long Island for over 40 years, our in-house team delivers top-quality workmanship with no subcontractors. We are Andersen Certified, GAF Master Elite, and James Hardie specialists, offering premium materials and long-lasting results. Homeowners count on us for energy-efficient upgrades, reliable service, and free, no-pressure estimates for any exterior project.