Why OSI
OSI takes the best practices from years of experience in new-home construction and brings that expertise to replacement windows. WINTeQ™ Window Installation System is the cornerstone, a completely compatible line of products that remove the guesswork from replacement window installation.
The First Complete & Compatible Window Installation System
OSI WINTeQ products are tested in accordance with the American Architectural Manufacturers Association (AAMA) to provide a total window installation solution.
Until recently window and door installation required the use of multiple component products from multiple manufacturers. There was no guarantee that the selected components would be compatible or that they would perform as a system.
That problem has been solved.
A complete, tested, warranted window installation system will guarantee performance, quality and compatibility of all product components and is available from a single manufacturer. You'll learn why a single system should be used in your next project.
