Integrity Windows: Energy-Efficient Beauty with Ultrex Fiberglass

Multi-Housing News published an article featuring Integrity from Marvin Windows and Doors and how their Ultrex fiberglass products are durable enough to withstand harsh elements, including baseballs. Ultrex is a pultruded fiberglass that was patented by Integrity Windows and Doors twenty years ago. Standard windows may bend or break but Integrity windows hold strong without signs of wear and year.