Vinyl and fiberglass are both excellent low-maintenance, energy-efficient options, but they differ in important ways that affect your decision.
Vinyl windows are more affordable, never need painting, and resist fading and moisture. Fiberglass windows are stronger and more dimensionally stable, meaning they expand and contract at a rate close to glass — a real advantage through temperature swings. Fiberglass is also paintable, offering flexibility for color matching and HOA requirements.
Choose vinyl for value and simplicity; choose fiberglass when you want premium stability, paintability, and slimmer frames. Your free estimate covers both with honest comparisons.