Window cost by frame material: vinyl vs fiberglass vs wood and more
Live installed costs for vinyl, fiberglass, wood, aluminum and composite windows side by side, with lifespans, and what triple-pane glass adds.
Replacing six windows with vinyl frames typically costs $3,300 installed, against $4,150 for fiberglass and $7,550 for wood. Vinyl is the value choice for most homes; fiberglass and wood last longer and cost more, and thermally broken aluminum can come in lower still. Moving from double-pane to triple-pane glass brings the vinyl job to about $4,150.
Every frame material, same job
The table prices one job with each frame material: six windows of about 47 x 55 in, each with two operable sashes, full-frame replacement from inside, a three-layer seal around each window, new interior sills, patching and repainting around the frames, and hauling away the old windows. Only the frame changes; the glass is double-pane. We build the figures from the hours the work takes, multiplied by local rates, plus materials, and check them against market prices and real quotes. They are before sales tax.
| Material | Typical | Usual range | Lifespan |
|---|---|---|---|
| Aluminium (thermally broken) | $2,450 | $1,950 – $3,200 | 30-45 years |
| Vinyl / uPVC | $3,300 | $2,600 – $4,300 | 25-35 years |
| Fibreglass | $4,150 | $3,250 – $5,400 | 30-50 years |
| Composite | $4,600 | $3,550 – $5,950 | 30-50 years |
| Timber | $7,550 | $5,850 – $9,800 | 30-60 years |
For your own number of windows and local rates, use the calculator on Window replacement.
The frame materials
Vinyl
The most common replacement window in the US, and the cheapest of the well-insulating frames. Multi-chamber vinyl frames insulate well, never need painting and resist moisture. The trade-offs: frames are bulkier than fiberglass or aluminum, so you see a little less glass; dark colors can suffer in strong sun; and vinyl expands and contracts more than other materials, which over many years can strain seals. Quality varies a lot between product lines, so compare the whole-window performance ratings, not just the price.
Fiberglass
Fiberglass frames move with temperature at a rate close to glass itself, so seals stay tight and the frame stays straight. They are strong enough for slimmer profiles, can be painted and handle both heat and cold well. They cost more than vinyl, and fewer manufacturers make them, so lead times can be longer.
Wood
Wood has the warmest look and insulates well, and good wood windows can be repaired rather than replaced. The catch is upkeep: exterior wood needs painting or staining on a schedule, and neglected sills and lower sashes rot. Many buyers who want wood inside choose a clad version with a low-maintenance exterior.
Aluminum
Aluminum ($2,450) is strong, slim and often the lowest-priced frame, which suits large glass areas and modern designs. Aluminum conducts heat, so in any climate with a real winter insist on a thermally broken frame, which is what our figures assume. Without the break, frames get cold and condensation forms on the inside.
Composite
Composite frames ($4,600) blend wood fiber and resin or similar materials. They aim to combine the stability of fiberglass with the look of wood and take paint well. Performance depends heavily on the specific product, so read the ratings for the model you are quoted.
Double vs triple glazing
Our mid-range figure uses double-pane glass with a low-e coating. Triple-pane adds a third pane and a second gas-filled space:
| Glazing (vinyl frames) | Typical cost, six windows |
|---|---|
| Double-pane | $3,300 |
| Triple-pane | $4,150 |
Triple-pane glass lowers heat loss further, keeps the inside pane warmer, reduces condensation and cuts outside noise. It also makes the sash heavier, which matters for large operable windows. It pays off most in cold northern climates, on big north-facing windows and near busy roads. In mild climates, a good double-pane unit with the right low-e coating is usually the better use of money.
What to compare besides the frame
- U-factor and solar heat gain. Ask for whole-window ratings, frame included. Lower U-factor means less heat loss. In hot, sunny climates, a low solar heat gain coefficient matters as much.
- Full-frame vs insert. An insert window fits inside the old frame. It is quicker and cheaper but keeps the old frame and loses some glass. Our figures assume full-frame replacement.
- Installation. A three-layer seal, low-expansion foam and proper sill flashing decide whether a good window stays draft-free.
- Warranty. Check what is covered for the frame, the glass seal and the installation, and whether it transfers to a buyer.
Incentives and permits
The federal 25C credit, which used to cover qualifying windows, does not apply to property placed in service after December 31, 2025 (IRS). Some states run IRA home energy rebate programs (HEAR/HOMES), availability varies by state, and utilities sometimes offer rebates; the DSIRE database lists state and utility incentives. Changing the size of an opening is structural work and usually needs a local permit.
Before you sign
Get quotes that name the product line, frame material, glass package and ratings, and say whether the job is full-frame or insert. Then run each price through our "Is my quote fair?" tool, which compares it with what homeowners in your area typically pay for the same job.