Estimate window replacement count, sizes, and total cost.
Window Type Comparison
Choosing the right window type affects energy efficiency, maintenance, and home value. Compare materials to find the best fit for your needs.
| Type | Cost Each | Energy Efficiency | Maintenance |
|---|---|---|---|
| Vinyl | $200-600 | Good | None |
| Wood | $400-1,200 | Excellent | High (paint/stain) |
| Fiberglass | $400-1,000 | Excellent | Very Low |
| Aluminum | $200-600 | Fair | Low |
Frequently Asked Questions
How much do replacement windows cost?
Vinyl windows: $200-600 each. Wood: $400-1,200. Fiberglass: $400-1,000. Aluminum: $200-600. Installation adds $100-300 per window. Total per window installed: $300-1,500 depending on type and size.
How do I measure for replacement windows?
Measure width at three points (top, middle, bottom) and use the smallest. Measure height at three points (left, center, right) and use the smallest. Measure diagonally to check for square.
What type of window is most energy efficient?
Triple-pane windows with low-E coating, argon gas fill, and warm-edge spacers offer the best efficiency. Double-pane low-E windows provide the best value. Look for ENERGY STAR certification and U-factor below 0.30.
How many windows does a house typically have?
Average homes have 8-15 windows. Larger homes may have 20-30+. Building codes require egress windows in bedrooms and natural light requirements that determine minimum window sizes per room.
When should I replace my windows?
Replace when you notice: drafts, condensation between panes, difficulty opening/closing, high energy bills, visible decay, or single-pane glass. Quality windows last 15-30 years before needing replacement.
What is the difference between single and double-hung windows?
Single-hung: only the bottom sash moves. Double-hung: both sashes move and tilt in for cleaning. Double-hung is more popular and versatile but costs 10-20% more than single-hung.
Do I need permits to replace windows?
Most jurisdictions don’t require permits for same-size window replacements. Changing window sizes, adding new openings, or structural modifications require permits. Check local building codes to be sure.
What is a window U-factor?
U-factor measures heat transfer through the window. Lower is better. Look for U-factor below 0.30 for cold climates, below 0.40 for mixed climates. ENERGY STAR requirements vary by climate zone.
How long does window installation take?
A professional crew can install 10-15 replacement windows in a single day. New construction windows in a new home take 1-2 days. Each retrofit window takes 30-60 minutes depending on complexity.
What is low-E glass?
Low-E (low-emissivity) glass has a microscopic metallic coating that reflects heat. In winter it keeps heat inside; in summer it blocks solar heat gain. It reduces energy costs by 15-30% compared to clear glass.