New windows improve comfort, cut drafts, and lower energy bills, but the options can be overwhelming. A few key factors separate a good choice from an expensive mistake.
Frame material
Vinyl is the most popular for its low cost and maintenance; fiberglass is stronger and more stable; wood looks classic but needs upkeep; aluminum conducts cold and is less common in cold climates. Match the material to your budget and maintenance appetite.
Glazing and energy ratings
Double or triple glazing with low-E coatings and inert gas fills dramatically improves insulation. Look for energy-rating labels (like ENERGY STAR) suited to your climate zone — they make a real difference in comfort and bills.
Installation matters most
Even a great window performs poorly if installed badly. Proper flashing, sealing, and insulation around the frame prevent drafts and water intrusion, so choose an installer as carefully as the window.