Fiberglass

Advantages of Fiberglass Frames

  • Traditional wood profile
  • Extremely strong—can hold large expanses of glass
  • Low maintenance
  • Paintable

Fiberglass frames are essentially composed of glass fibers and resin, materials that expand and contract very little with temperature changes in the weather. Until recently, the complex profiles required for window designs have been impossible to attain with fiberglass. Innovation has made it possible to design a fiberglass frame and fiberglass windows and patio doors are becoming more popular among homeowners for its beauty and long-lasting durability.

Fiberglass windows and doors can replicate the look and feel of wood with a veneer while helping to resist swelling, rotting and warping. The frame expands and contracts at approximately the same rate as the insulated glass it holds for improved energy efficiency and strength. While fiberglass frames do not require repainting for upkeep, the material is able to be repainted if you prefer to change colors.

Fiberglass frames are also popular because a wood veneer can be added to the interior. This gives you the best of both worlds: the durability of a fiberglass frame exterior and the warmth and beauty of a wood-look interior.

Milgard’s fiberglass is produced using a process called pultrusion. Glass rovings and mats are pulled at tremendous forces through a resin bath and a series of dies. These materials combine and catalyze to provide tensile and torsion strength. All final products undergo extensive testing for quality and consistency.

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More Materials

Wood is prized for its natural beauty and warmth. A delicate frame material that is vulnerable to sun and rain, wood is nevertheless desired for its authenticity. Wood-grain texture and intricate details are only provided by solid wood and cannot be truly replicated with wood veneer. Sanding and painting is part of routine maintenance. Solid wood frames are best suited for areas with temperate climates.
Vinyl frames are especially energy efficient due to its ability to trap air. In addition to their insulating properties, vinyl frames are UV resistant, require little maintenance and are generally more affordable compared to its wood and fiberglass counterparts.
There is nothing quite like aluminum --- a recognized and established frame material that architects and builders have specified for years. The strength and distinct feel of aluminum has made it timeless. Aluminum frames are easy to maintain and are sometimes less expensive than other frame options.