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Jun 02, 2026
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How Wood Rot Can Ruin Your Windows

Wood rot around windows is one of the most prevalent home structural issues.  While not exclusive to windows, the appearance of dry rot depends on the type of fungus that is present.  Colors can include brown, white and yellow.  Evidence wood rot has occurred include shrinking, warping, and discoloration.  If your windows are experiencing any of these symptoms, it’s best to get a contractor’s opinion on whether you need new replacement windows.

Causes Of Wood Rot Around Windows

Rotting Window Frames Can Be Caused By Poor Installation

The fungi that creates wood around your window to rot requires moisture to grow.  This means that a window that’s damaged by dry rot is being impacted by a structural deficiency that is permitting moisture into your house and trapping it in an unnatural place.  Many times, wood rot around windows is a result of an inexperienced contractor making installation mistakes.  For example, insufficient caulking around windows will allow water infiltration, which leads to rot.  If window flashing is skipped or incorrectly installed, rain and moisture can enter your home, creating rot around windows.

Rotted wood framing around a window caused by long-term moisture intrusion

Rotting Window Frames Are Problematic

Failure to maintain windows with exteriors comprised from wood, also invites moisture to infiltrate your home.  With moisture present, pests such as carpenter ants and termites, are attracted and feed off the wood, creating further deterioration.

bad house windows

How To Identify Wood Rot Around Window Frames

Frustratingly enough, wood rot around windows can be tricky to spot in its early stages.  Warning signs of rotten wooden window frames include discoloration and the frame being soft to the touch.  When window rot has been present for an extended period of time, the homeowner will be able to spot the water entering the home.

Rotten Window Frames Pose Serious Health Risks

In addition to the financial difficulties wood rot can cause, there are several health risks it poses.  Wood rot causes mold growth.  This is particularly problematic for those with primary immunodeficiency and asthma.  Even for overall healthy individuals, prolonged exposure to mold can lead to sore throats, respiratory infections, congestion, frequent sneezing, and strained breathing.  The health risks alone warrant replacement of all rotted windows.

window installation

How To Prevent Wood Rot Around Windows

A home window replacement project shouldn’t be entrusted to just any contractor.  Take care to get multiple quotes, verify references, and read online reviews.  You’ll likely have more success with a contractor that prefers full frame window replacement over insert window replacement. This allows for the inspection of the rough opening and avoids a situation where you’re installing a new window into a rotted frame, as can happen with insert windows.  Wood window trim should be routinely painted and sealed in order to prevent rot from manifesting itself.  Inspect the caulking around your windows frequently and scrape away any that has hardened and replace with new caulk.

Why The Contractor You Pick For Your Rotted Windows Replacement Matters:

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Home Window Replacement Reviews:

"Lindus replaced four windows in my 71-year-old home. Anyone I had reason to be in contact with was pleasant and helpful. The windows they installed met expectations. The installers did a great job, came when scheduled, and were helpful with acquainting us to new windows. I feel this was a much needed project, and upon completion, well worth it. Would not hesitate to recommend Lindus."

Mark S.
Woodville, WI
May 10, 2026

"Kevin was on time, experienced, and knowledgeable. He was able to diagnose the problems with my windows, make repairs, and offer long-term solutions. Lindus is an honorable company, to be sure."

Bob B.
Brooklyn Park
April 21, 2026

"Reasonable price."

Jeanne C.
River Falls, WI
April 8, 2026

"Just had new windows installed. WOW what a nice job! I think the guys left the house cleaner than it was before they got here. Great trim work, very detail oriented. Super crew. Thanks guys!"

Dave B.
Bloomington, MN
April 3, 2026

“Had new windows installed, and every part of the experience—from the quote with Dylan to the installers, Rick and Sam—was handled in a very professional and friendly manner. We appreciated how careful they were in protecting their work area and how clean they left everything when the job was finished. We will definitely call again for any work needed in the future.”

Lynda A.
Woodville, WI
March 10, 2026

"Kevin stopped out to give me an estimate to repair a casement window that wouldn’t open. Upon inspection, he was able to open it!  Even though it ended up not needing to be fixed, he talked to me about options I could consider in the future should I need to replace it. It was very refreshing to have a discussion without feeling pressured to purchase something that I do not need at this time. Thanks Kevin!!"

Marcie K.
Burnsville, MN
February 6, 2026
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