Life comes with few guarantees.
Great Lakes custom vinyl windows have guaranteed construction quality, unmatched energy efficiency and low maintenance. Great Lakes windows combine functional beauty with advanced thermal performance to deliver the ultimate in window systems. Your windows are covered by a lifetime limited warranty that is even transferrable to the next homeowner. Unlike windows that use staples, screws, or caulk to hold their frames together, Great Lakes welds vinyl sections together to create a solid one-piece unit that won't loosen or weaken over the years. Every Great Lakes window is constructed of rugged, maintenance-free vinyl.