Fiberglass window frames expand and contract at the same rate as the insulated glass it holds. With less stress on the window seals, the incidents of seal failures, and the resulting air leaks, are reduced.  Composite fiberglass window lineals  are extremely durable and provide high thermal performance across temperature extremes.

As a result of the increasing popularity over the years, these windows are found throughout the US and Canada in hot and cold climates.

Fiber is impregnated with resin and pulled through a heated die on a pultrusion machine. The resin cures and exits as a fully formed window lineal which is then cut to length and fabricated into a window frame.

Technical Data

  • High R-Values/Low U-Factors
  • High condensation resistance
  • Thermal Conductivity 2.08 BTU/in/hr/SF/oF

Fiberglass windows are tested to the same structural performance standards as aluminum, vinyl and wood windows.

Why This Solution?
Pultruded composite window frames provide the following:

  • Higher thermal comfort – Resistant to the most extreme heat, cold & sea air
  • Low thermal conductivity
  • Strength and durability
  • Low maintenance
  • Can be produced to closely resemble painted wood

Learn More about Composite Window Frames