Fiberglass Windows
Window frames made of pultruded fiberglass — stronger, more stable, and longer-lasting than vinyl but more expensive.
Quick answer
Fiberglass Windows: Window frames made of pultruded fiberglass — stronger, more stable, and longer-lasting than vinyl but more expensive. Typical cost: $700–$1,400 per window installed..
Why it matters
Fiberglass holds dark paint without warping, expands at the same rate as glass (reducing seal failures), and lasts 50+ years.
Typical cost
$700–$1,400 per window installed.
Pros
- • Strongest residential frame
- • Holds dark paint
- • Best long-term durability
Cons
- • 30–60% more than vinyl
- • Fewer style and brand choices
Common uses
- • High-end replacements and new construction
Alternatives
VinylAluminum-clad wood
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Frequently asked questions
- Fiberglass vs vinyl?
- Fiberglass for long-term ownership and dark colors; vinyl for budget projects.
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