What is a fiberglass composite product?

As you browse through The Window Man's many window products you may find yourself wondering what fiberglass composite is...

Pultrusion is the process used to produce continuous lengths of strong, fiberglass composite products having a constant cross section. Products manufactured using this technology include window framing materials, rods, structural shapes, beams, channels, pipe, and tubing.

The manufacturing process works like this: continuous strands of fiberglass rovings and fiberglass mats are impregnated with resin, then drawn through a steel die which sets the shape of the stock. A portion of the die is heated to initiate the cure. The end product is a Thermoset Fiberglass Composite. Very high strengths are possible due to high glass concentration and the orientation of fiberglass rovings and mats parallel and perpendicular to the length of the material being drawn through the die.

(What does thermoset mean: heat is generally used to cause a chemical reaction which sets the shape of the part permanently. Once the materials are cured they cannot be reformed: the process is irreversible.)

To preview fiberglass composite windows and doors stop by one of The Window Man's three Northern Virginia showrooms.