Infinity from Marvin - Homespire Windows & Doors is a Pennsylvania-based window and door replacement company. Our Ultrex windows, which are 8x stronger than vinyl, are perfect for the PA climate. Each window is custom-made for each home with the highest quality American materials, allowing us to proudly label our windows Made in USA certified. At every step in the window replacement process, you will work with Homespire-hired and trained employees, from the sales representative to the installer. Hiring and training our own W2 employee installers means we can offer the most truthful and comprehensive lifetime warranty on the market, covering both our products and labor.