Storm Windows
Secondary exterior or interior windows installed over single-pane originals to add an insulating air gap.
Quick answer
Storm Windows: Secondary exterior or interior windows installed over single-pane originals to add an insulating air gap. Typical cost: $200–$500 per window installed..
Why it matters
Storms are a $200–$400 per opening alternative to a $1,000+ replacement, often suitable for historic homes that can't change primary windows.
Typical cost
$200–$500 per window installed.
Pros
- • Fraction of replacement cost
- • Preserves historic primary windows
- • Some are low-E rated
Cons
- • Less efficient than full replacement
- • Exterior styling limitations
Common uses
- • Historic homes
- • Tight-budget energy upgrades
Alternatives
Full replacementWindow inserts (Indow, etc.)
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Frequently asked questions
- Are storm windows worth it?
- Yes for single-pane originals — they cut window heat loss 25–50% for a fraction of replacement cost.
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