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Why Are My Wooden Windows Rotting? (And What You Can Do About It)

Updated: 4 days ago


Is your home losing its charm to decaying window frames? Don't let rot compromise your home's beauty, comfort, and value. Welsh Windows Plus has the solution.

The Hidden Danger of Window Rot in Chicagoland Homes

Old wooden windows can add character and charm to a home—but when they begin to rot, they quickly become a serious concern affecting both your home's appearance and structural integrity. For homeowners across the Chicagoland area, particularly in the South Chicago Suburbs, window rot is an all-too-common problem that can lead to higher energy bills, uncomfortable drafts, and costly repairs if left untreated.

What Causes Windows to Rot?

Understanding the root causes of window rot is the first step toward addressing the problem:

  • Moisture Exposure: Continuous exposure to rain, snow, and high humidity accelerates wood deterioration.

  • Lack of Maintenance: Failing to repaint or seal windows regularly leaves them vulnerable to moisture infiltration.

  • Aging and Wear: Wooden windows typically have a lifespan of 20-30 years, after which they become increasingly susceptible to rot.

  • Harsh Chicago Climate: Our region's dramatic seasonal changes—from humid summers to freezing winters—create the perfect conditions for wood deterioration.

How to Identify Rotting Window Frames

Catching rot early can save you time and money. Look for these warning signs:

  • Discoloration and Warping: Dark patches, bulging, or misshapen wood around the frame.

  • Soft or Crumbling Texture: Wood that feels spongy or crumbles easily when pressed.

  • Visible Mold or Mildew: Fungal growth around the window frame indicates persistent moisture issues.

  • Drafts or Leaks: Unexplained cold spots, rising energy bills, or water infiltration during rain.

Did you know? The U.S. Department of Energy (DOE) has estimated that heat gain and loss through windows accounts for 25-30% of residential heating and cooling energy use. They've suggested that energy-efficient windows can reduce this energy loss. -source

Can Rotting Windows Be Saved?

While it's natural to wonder if your rotting windows can be restored, the reality is that extensive rot often makes replacement the more cost-effective solution:

  • Minor Rot: Small areas of damage may be repaired through sanding, patching, and resealing.

  • Extensive Rot: When rot has penetrated deep into the wood or affected multiple windows, repairs become increasingly expensive and temporary.

  • Professional Assessment: Our expert team can evaluate your windows and provide honest recommendations based on the extent of damage.

The Cost Reality: Repair vs. Replace

Many homeowners are surprised to learn that repairing rotted wooden windows can often cost more in the long run than replacing them:

  • Recurring Repairs: Wooden windows in our climate often require repeated maintenance and repairs.

  • Rising Energy Bills: Compromised windows continue to leak air, driving up heating and cooling costs.

  • Property Value Impact: Deteriorating windows can reduce your home's market appeal and value.

Why Vinyl Windows Are the Smart Choice

When faced with rotting wooden windows, thousands of our customers have discovered that vinyl replacement windows offer superior benefits:

  • Lifetime Durability: Unlike wood, vinyl never rots, warps, or requires painting.

  • Enhanced Energy Efficiency: Modern vinyl windows can reduce energy costs by up to 30%.

  • Improved Comfort: Eliminate drafts and cold spots with properly sealed, insulated windows.

  • Low Maintenance: Enjoy decades of performance with simple cleaning—no scraping, sanding, or painting.

  • Increased Home Value: Quality replacement windows easily and quickly increase the value of your home.

Customer Success Story "Welsh Windows did an amazing job installing new windows throughout our house. They were so easy to work from the first time contacting them all the way through the install. Bobby even reached out after to ensure we were happy with everything! The team was very careful to keep the house clean. Would recommend them to anyone looking for any window installs or replacements!" - Mike — Tinley Park, IL

Our Service Areas

Welsh Windows Plus proudly serves homeowners throughout the South Chicago Suburbs, including, but not limited to:


Alsip, Blue Island, Bridgeview, Burbank, Chicago Heights, Chicago Ridge, Crestwood, Crest Hill, Dolton, Frankfort, Homer Glen, Homewood, Joliet, Lemont, Lockport, Matteson, Merrionette Park, Mokena, New Lenox, Oak Forest, Oak Lawn, Orland Hills, Orland Park, Palos Heights, Palos Hills, Palos Park, South Holland, Tinley Park, Worth


No matter where you live in the South Chicago Suburbs, our expert team is ready to help you transform your home with beautiful, energy-efficient vinyl windows.

Why Choose Welsh Windows Plus?

For over 20 years, Welsh Windows Plus has been the trusted name in window replacement throughout the Chicagoland area:

  • Expertise You Can Trust: With thousands of successful installations, our team brings unmatched knowledge and skill to every project.

  • In-House Installation Team: Unlike companies that use subcontractors, our professionally trained installers are part of our company family.

  • Seamless Process: From your initial inquiry to the final installation, we prioritize transparency, quality, and personal connection.

  • Financing Options Available: Enjoy affordable monthly payments with our flexible financing plans.

  • Industry-Leading Warranties: Rest easy knowing your investment is protected for years to come.


Ready to say goodbye to rotting windows? Contact Welsh Windows Plus today for a free, no-obligation consultation and quote. Our team will help you explore your options and find the perfect solution for your home and budget.

Take the Next Step

Don't let another season pass with deteriorating windows draining your wallet and compromising your comfort. Contact Welsh Windows Plus today!

  • Call us directly and speak with Jennifer to schedule a free consultation.

  • Fill out our simple online form for a free quote.

  • Visit our showroom to see and feel the difference quality windows can make.


Transform your home's beauty, comfort, and energy efficiency with Welsh Windows Plus—your trusted partner for window replacement in the South Chicago Suburbs.

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