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What Causes Warping in Windows?

Windows are typically made with wood or vinyl, which are vulnerable to warping. It might not sound like such a big deal, but warping is the reason why windows have drafts or are difficult to open and close. In today’s post, Renewal by Andersen of Kansas City takes a look at the common causes of warping — and how it can be avoided with our replacement windows.

What Causes Warping?

Thermal expansion is caused by changes in temperature. This is barely noticeable in some materials because they expand and contract evenly, reverting to their original shapes upon contracting. However, some materials don’t: uneven thermal expansion and contraction causes permanent warping or sagging in these materials, resulting in the problems described above. Warped frames may push against the sashes, resulting in difficult operation. In some spots, the warped frames may form gaps that result in air leaks.

Moisture is another factor that can cause warping. Wood frames are particularly susceptible to this because cellulose, the fibers that make up a significant portion of wood, is moisture-absorbent. When exposed to humid conditions, the cellulose in the wood frame absorbs moisture. Some fibers absorb and retain more moisture than others, which ultimately results in permanent warping. This is the reason why wood needs to be treated and painted or sealed when used on house exteriors.

Can Warped Windows Be Repaired?

Warping is irreversible, but there are a few things that you can do that can help restore some functionality. Warped wood windows can be carefully planed, removing just enough to allow the sash to fit without creating new gaps. Hardware can also be adjusted to allow easy opening and closing, while new weatherstripping can be installed to seal gaps created by warping.

Fibrex® Material

The best-case scenario is not having to deal with warped windows at all, and this is where we present our solution. Our replacement windows feature frames made of Fibrex® material, an exclusive composite developed by our parent company, Andersen® Corporation. Fibrex is made of wood fibers and polymer, and exhibits the best of both: the strength and durability of wood and the low-maintenance properties of vinyl. As a manufactured material, Fibrex is warp-resistant and will keep its shape under most conditions.

Renewal by Andersen of Kansas City provides replacement windows to customers in Kansas City, MO, and the surrounding communities. Give us a call at (913) 956-0887, or fill out our contact form to schedule an appointment.

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"I highly recommend Renewal by Andersen. I am extremely impressed with their ability to take care of any issues I have. The product is superb and is the first thing everyone notices when they come to my home."

PAMELA BLASCHUM | OVERLAND PARK, KS
April, 7

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