Composite Window Cost: Price by Frame and Installation

Composite windows typically cost $900 to $1,800 per window installed. That installed price usually covers the unit, labor, old-window removal, and interior or exterior trim, though each line item is priced separately on a formal estimate. Whether you choose an insert or full-frame replacement depends on the condition of the existing frame after a contractor inspects it.

What Goes Into Composite Window Cost

Composite window frames combine wood fibers and thermoplastic resins to create a rigid, paintable material that resists rot and expansion. Because the material costs more than vinyl and the installation requires carpentry skill, the price per unit sits above basic vinyl replacements.

A typical estimate separates costs into four categories:

1. Window unit
2. Labor
3. Removal and disposal
4. Trim and finishing materials

A contractor will not finalize insert versus full-frame pricing until the frame is inspected. If the existing frame is square, level, and free of rot, an insert may work. If the frame is damaged or out of square, full-frame replacement is usually required.

Composite vs Other Frame Materials

Composite windows are priced between vinyl and premium wood options. The following ranges are estimates and reflect typical installed pricing per window.

Composite costs more than vinyl because the raw material and manufacturing process are more expensive. It often costs about the same as wood or slightly less, depending on the species and finish. Fiberglass usually falls below composite but above vinyl in many markets.

Insert vs Full-Frame Installation

Insert replacement keeps the existing frame and installs the new window inside it. This approach uses less labor and preserves interior and exterior trim. A vinyl double-hung insert typically runs $350 to $800 installed. Composite inserts can cost more because the unit itself is priced higher, but the labor portion may be similar if the frame is sound.

Full-frame replacement removes the window down to the rough opening. The contractor replaces the frame, sill, and often interior trim or exterior flashing. Full-frame replacement typically costs $550 to $1,100 per window for standard materials, with composite units at the top of that range or above it.

Arithmetic example for a three-bedroom home with ten windows:

• Ten composite windows at $1,350 average installed cost: 10 × $1,350 = $13,500
• If half require full-frame work at $1,100 and half are inserts at $900: (5 × $1,100) + (5 × $900) = $5,500 + $4,500 = $10,000

These figures are estimates. Your actual quote depends on window size, glass package, grid patterns, and local labor rates.

Size, Style, and Glass Options

Window dimensions are measured in feet and inches. A standard double-hung might be 2 feet 8 inches wide by 5 feet tall. Larger units require more composite material and heavier glass, which increases the unit price and may require two installers instead of one.

Common style factors that affect price:

• Single-hung or double-hung: usually the most affordable operating styles
• Casement or awning: more hardware, often a higher unit price
• Sliding: priced similarly to double-hung in many product lines
• Picture window: no operating hardware, but large glass areas increase cost
• Bay or bow: multiple units joined together, typically $1,500 to $5,000 installed

Glass choices also move the price. Double-pane insulated glass is standard. Triple-pane, low-emissivity coatings, argon gas fill, and laminated or impact-rated glass add to the unit cost. If only the glass is failing, glass pane or IGU replacement typically costs $150 to $450, while screen replacement typically runs $100 to $350.

Labor and Structural Considerations

Labor is priced separately from the window unit. Installation time depends on access, floor level, and whether the crew must remove old weights, chains, or parting beads in older homes. A second-story window may require ladders or scaffolding, which adds labor time.

Composite frames are heavier than vinyl but lighter than solid wood. A typical 3-foot by 5-foot composite sash might weigh 30 to 60 pounds depending on glass thickness. A crew of two can usually handle standard residential sizes, but oversized picture windows or architectural shapes may require mechanical lifts or additional labor.

If the rough opening shows rot or termite damage, the contractor must repair the framing before installing the new window. Carpentry repairs are billed separately and are not included in the standard replacement range.

How to Get an Accurate Price

Start with a frame inspection. A qualified contractor measures the opening, checks for water intrusion, and determines whether an insert or full-frame replacement is appropriate. Only then can they separate unit, labor, removal, and trim costs into a written estimate.

You can compare composite pricing against other styles using these resources:

• Overall replacement pricing: /window-replacement-cost/
• Cost by window style: /window-replacement-cost-by-style/
• Bay window pricing: /bay-window-cost/

Additional style guides are available for bow, picture, casement, double-hung, and sliding windows.

Composite windows offer a durable, low-maintenance frame option, but they are not the lowest-cost choice on the market. Expect to pay $900 to $1,800 per window installed, with the final number determined by frame condition, installation method, size, and glass package. Treat online ranges as estimates, not quotes, and always request an itemized estimate after an in-person inspection.

Next, compare window replacement cost, window replacement cost by style, bay window cost before you commit.