Great Lakes Replacement Windows

Windows and doors made by Great Lakes stand apart from the competition as premium products made using state-of-the-art technology, modern equipment, and cutting edge operational techniques.

Great Lakes utilizes a manufacturing process known as Demand Flow Technology. It ensures a consistently high-quality product while manufacturing the most diverse product offering in the industry. Each window and door is ordered by a specific dealer to fulfill a Chicagoland homeowner’s custom order, a process enhanced by Demand Flow Technology.

UniFrame Replacement Windows

Built right for added strength. UniFrame windows are entirely fusion welded - both sashes and mainframes use this advanced manufacturing method. Unlike Chicagoland replacement windows that use staples, screws or caulk to hold their window frame corners together, UniFrame welds vinyl sections together to create a solid one-piece unit that won't come loose or weaken over the years.

New Generation™ Vinyl for maintenance freedom. Every UniFrame window is constructed with rugged maintenance-free uiPVC(polyvinyl chloride). UniFrame New Generation Vinyl windows will never stick like wood or metal windows because they don't sweat or deteriorate from corrosion, pitting or rot. Wash them with soap and water and they'll look great year-after-year. We also utilize the highest quality locking and operating hardware available. Our windows also feature E-Gard ™ hardware, which is chemical, corrosion and ultra-violet resistant.

Built tight to keep air out. Air infiltration is a major cause of energy loss. UniFrame sashes feature heavy-duty weatherstripping and double-hung and sliding windows feature full meeting rail interlocks. This method of construction creates a double barrier to air and water. Guaranteed For Life UniFrame believes so strongly in the durability of its products that it offers a limited lifetime warranty on the entire window unit - and it's transferable. In addition, UniFrame windows are backed by a lifetime non-prorated seal failure and glass breakage warranty.

UniFrame windows…good for you, good for your home and good for the environment.

If you are looking for a professional Chicagoland replacement window contractor, please call us today at 815-328-8684 or complete our online request form.