From what I learned, it’s really important to get windows and doors from a company that offers solid warranties and uses quality materials like vinyl or fiberglass, depending on your climate. When I used Windows & Doors Pro, they explained all this in detail and showed me samples. Their installers were experienced and very careful about sealing and fitting everything perfectly. It made a big difference — I haven’t had any issues since installation. So, ask a lot of questions and make sure they have good after-sales service, that’s key.