Frame material compare: vinyl vs wood vs fiberglass
Cheapest to buy is not cheapest to own: this tool spreads the price of vinyl, wood and fiberglass frames across their expected lifespan, so a frame that lasts 40 years competes fairly with one that lasts 20.
Over 10 windows, vinyl is $166.67/yr, wood $250.00/yr and fiberglass $175.00/yr on a cost-per-year basis from YOUR prices. Vinyl is the value default, fiberglass and composite balance strength and low upkeep, wood looks best but needs maintenance, aluminum conducts heat (worst U-factor) — a labeled compare, not a verdict.
Calculator inputs
Frame material is the single biggest lever on window price and on how the window ages. Vinyl is the value default; wood carries the highest upfront cost and needs periodic finishing; fiberglass and composite sit in between, trading a higher price for strength and low upkeep; aluminum is strong but conducts heat and posts the worst U-factor. Comparing sticker prices alone flatters the cheapest frame — so this tool converts each to a cost per year of expected life, the fairest single number for a long-lived building component.
Enter the real installed price from your quotes and the lifespan you expect (the labeled planning ranges are a starting point). The verdict is a labeled compare from your numbers, not a verdict on any brand.
Formula
For each material, total cost then cost spread over its life:
cost = count × pricecost per year = cost ÷ lifespan
Lower cost-per-year is the more economical frame over the hold period — but read it alongside upkeep and looks, not on its own.
Worked example
Across a 10-window job with the labeled default prices and lifespans:
- Vinyl: 10 × $500 = $5,000 ÷ 30 yr = $166.67/yr
- Wood: 10 × $1,000 = $10,000 ÷ 40 yr = $250.00/yr
- Fiberglass: 10 × $700 = $7,000 ÷ 40 yr = $175.00/yr
On cost-per-year, vinyl is the cheapest and fiberglass is close behind — while fiberglass buys you far more strength and dimensional stability for that small premium. Wood costs the most per year here, and that figure still excludes the periodic refinishing wood needs, which a real ownership budget would add.
Background & practice
Read the whole picture. Cost-per-year is a fair anchor, but it ignores maintenance labor (wood), energy performance (aluminum’s poor U-factor can raise heating bills — check the U-factor to R-value converter) and resale/looks (clad-wood and fiberglass command a premium). Feed those into your own judgment; the tool gives you the money axis.
What to confirm. That every quote is for the same window type and glass package, or you are comparing frames and hidden spec differences at once. Lifespan varies with climate, exposure and upkeep — a south-facing wood window in a wet climate will not reach 40 years without diligent finishing.
Common mistake. Assuming the cheapest frame is the best value. A slightly dearer fiberglass or composite frame often wins on cost-per-year once its longer life and lower upkeep are counted.
Reference table
| Frame material | Installed band ($/window) | Typical lifespan (yr) | Notes |
|---|---|---|---|
| Vinyl | $300.00–$800.00 | 20–40 | The value default; low upkeep |
| Aluminum | $350.00–$900.00 | 15–30 | Strong but conducts heat (worst U-factor) |
| Composite | $450.00–$1,200.00 | 30–50 | Balances strength and low upkeep |
| Fiberglass | $500.00–$1,500.00 | 30–50 | Strong, stable, low upkeep |
| Wood | $800.00–$2,000.00 | 20–50 | Best looks; needs maintenance |
Lifespan and cost are labeled planning typicals — confirm with your own quotes and the manufacturer’s warranty.