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Window Warping: What Is It and What Causes It?

Warping is a common problem in wood and vinyl windows. It does not only affect the curb appeal of your home, but it also decreases its overall energy efficiency and comfort. So, what is window warping, and why does it occur? Our window specialists share more information in this post.

Window Warping

What Are Warped Windows?

Warping occurs when windows begin to bend and look deformed. It creates gaps around the windows, allowing unwanted air leakage or heat transfer. Various types of window warping are:

  • Bow  Perhaps the most prevalent type of window warping, bowing occurs when the window bends along its face.
  • Crooked  This is another common type of window warping. A crooked window occurs when it bends along the edge.
  • Cup  Cupping occurs when the window warps inward or outward.
  • Twist  Twisting occurs when the edges of the unit appear twisted.

What Causes Warped Windows?

Moisture is a major reason behind warped windows. Because wood naturally absorbs and retains moisture, it is prone to warping. Changing temperatures also cause wood windows to undergo frequent contraction and expansion. When this takes place, window openings become a poor fit and can be another factor that causes bending.

A lot of other variables can influence how dramatically wood and vinyl windows warp. These include grain orientation, sunlight exposure and air circulation.

The Best Solution: Fibrex® Windows

It is clear that warped windows are a problem that needs to be fixed as soon as possible, and the only effective way to do this is to replace them. Unlike wood and vinyl windows, Fibrex windows are made of composite materials that resist warping, rot and decay. They also do not shrink or expand under fluctuating temperatures, making them ideal for any climate.

For strong and energy-efficient replacement windows, look no further than Renewal by Andersen® of Wyoming. Our professional team can help you find the best design, size and finish for your specific needs. Contact us at (307) 472-2199, or fill out our convenient online form to request a free estimate.


"They came to put two windows in my bedroom and they were very clean and quick, and they cleaned up after themselves, I would hire them again."

Casey Woods
May 10, 2019

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