Best for historic aesthetics but requires painting/staining. Fiberglass: Extremely durable and mimics the look of wood.
Look for the label and pay attention to these ratings: U-Factor: Measures heat loss (lower is better). how to buy windows for house
Ask about the "labor warranty" in addition to the "product warranty." Best for historic aesthetics but requires painting/staining
Check for licenses, insurance, and manufacturer certifications. ideal for wide openings.
Your (for a single window or whole house). The climate you live in (extreme cold, coastal, or desert).
To help you narrow down the best options for your specific project:
Hinged at the side; great for maximum ventilation. Sliding: Operates horizontally; ideal for wide openings.