Built right for added strength. Great Lakes Window "windows" are entirely fusion welded - both sashes and mainframes use this advanced manufacturing method. Unlike windows that use staples, screws or caulk to hold their window frame corners together, Great Lakes Window 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 Great Lakes Window "window" is constructed with rugged maintenance-free uiPVC(polyvinyl chloride). Great Lakes Window 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. Windows by Great Lakes Window 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. Great Lakes Window 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.

Superior Performance for Year Round Comfort. The Hi R+Plus glass system is designed to keep your home warm in the winter, and cool in the summer - that's because Hi R+Plus glass combines ultra low-emissivity with the optimal balance of shading and solar heat gain.The result is increased energy efficiency and decreased utility expenses.

Guaranteed For Life Great Lakes Window 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, Great Lakes Window "windows" are backed by a lifetime non-prorated seal failure and glass breakage warranty.

Great Lakes Window "windows" are Energy Star qualified for your region of the country.

The ENERGY STAR Window Program is a voluntary partnership between the U. S. Department of Energy and participating window manufacturers. ENERGY STAR performance requirements are tailored to fit the energy needs of the country’s different regions – north, central, and southern states.

Your investment in ENERGY STAR windows will pay for itself over time, and then the saving is money in the bank every year. ENERGY STAR labeled windows are twice as efficient as windows purchased just ten years ago and forty percent more efficient than products required under most common national building codes.

By choosing Great Lakes Window "windows", you can cut your heating and cooling costs, help make your home more comfortable and reduce air pollution – all without sacrificing versatility or style.