Master Seal

Master Seal is a trusted window installation service, door shop, door supplier, door warehouse, and window supplier serving the Baltimore area, specializing in energy-efficient windows and durable entry, patio, and security doors. Schedule a free in-home measurement and quote, and ask about glass packages (Low-E, argon), hardware upgrades, and written warranties for both products and labor. Visit their showroom to compare styles and colors, confirm lead times and delivery from the warehouse, and verify that old unit disposal and post-install cleanup are included. If you’re price-shopping, request an itemized estimate, inquire about financing or seasonal promotions, and review recent local installations to ensure the fit and finish meet your expectations.