If you live in Rockford, IL or nearby, you know how uncomfortable drafty windows can be. In summer, they let in hot, humid air, making your AC work overtime. In winter, they allow freezing drafts to creep in, raising your heating bills. Understanding what causes window drafts can help you fix the problem now, before the cold weather sets in. Here are six common causes of drafty windows in Rockford homes.

1. Deteriorating Window Seals
Rockford’s seasonal temperature swings put stress on window seals. Over time, they crack, shrink, or break down, creating gaps that let outside air in. While seal repairs may help temporarily, full window replacement is often the best long-term solution.
2. Poor Window Installation
If your windows were not installed correctly, even small gaps can lead to significant drafts. In older Rockford homes, shifting foundations or settling can make these gaps worse over time. Professional installation ensures a proper fit and long-lasting energy efficiency.
3. Aging or Outdated Windows
Older windows lose their insulating power as frames, glass, and sealants deteriorate. Modern replacement windows offer improved insulation, keeping Rockford homes cooler in summer and warmer in winter.
4. Single-Pane Glass Windows
Single-pane windows offer little protection from temperature extremes. They let in more cold during winter and more heat during summer. Upgrading to energy-efficient double or triple-pane windows can greatly reduce drafts and improve year-round comfort.
5. Worn-Out Weather Stripping
Weather stripping is essential for sealing gaps, but over time it can compress, tear, or loosen. While replacing weather stripping can help, it’s often a short-term fix if the window frame itself is damaged.
6. Misaligned or Damaged Frames
Rockford’s seasonal changes and house settling can shift window frames out of alignment, leaving gaps that allow air leaks. Rotted or warped frames can also weaken the seal between the window and the wall.
Temporary fixes like caulking or new weather stripping may work for now, but they won’t solve the root problem. Replacing drafty windows before winter not only keeps your home comfortable but can also lower your energy bills year-round.
Your Trusted Rockford Window Replacement Experts
At Lask Exterior Solutions, LLC in Rockford, IL, we provide professional window replacement services that eliminate drafts, improve energy efficiency, and boost curb appeal. Our energy-efficient windows are designed to handle Rockford’s hot summers and cold winters. Call (815) 964-2220 or fill out our online form today to schedule your free consultation.