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What Causes Warping in Vinyl & Wood Windows?

Warping is one of the most common issues with vinyl and wood windows. It’s where windows start to bend and deform. This problem will create huge, unsightly gaps that can negatively affect your home’s energy efficiency.

Here’s what causes warping in windows.

Causes of Window Warping

Moisture is the major reason windows warp. Wood absorbs and retains moisture, resulting in rotting and warping. Uneven moisture absorption in wood windows causes stress on the material. Stress makes the window contract and expand. The longer the moisture is kept, the more permanent the contraction and expansion are.

Grain orientation, sunlight, airflow, finishing and temperature also affect the degree at which windows warp. Still, even under ideal conditions, wood windows can warp when frequently exposed to moisture. Also, temperature changes can cause windows to expand and contract. Vinyl windows can become soft, warp and bow under extreme heat. Operable windows may bind or jam if the frame sags.

How Can You Avoid This Problem?

When you choose Renewal by Andersen® of Arkansas for your casement window replacement, you’re gaining access to our exclusive Fibrex® material. It’s composite that combines the strength and stability of wood, and the low-maintenance features of vinyl.

With its superior thermal insulating properties, Fibrex material helps keep your home warmer in winter and cooler in summer. Increased energy efficiency means more savings on your heating and cooling costs. Combine it with our expert installation, and you’ll end up with new windows that will stay beautiful regardless of climate and help you save energy bills.

Choose Renewal by Andersen of Arkansas for high-quality window replacement products and services. You can rely on us for your casement, picture, double-hung or bay window replacement. Call us at (479) 250-3588, or fill out our online form to schedule a free consultation. We cater to homeowners in Fayetteville, AR.


"We were pleased with the process from the sales representative through installation. Our windows are beautiful, and we are very pleased we made the decision to replace our windows with Renewal by Andersen."

Scott & Jackie, Arkansas, AR
November, 16

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