Can Old Windows Be Repaired to Improve Energy Efficiency?

Many homeowners assume that old, drafty windows need to be replaced entirely to improve energy efficiency. However, in most cases, windows can be repaired to operate as good as new, often at a fraction of the cost of replacement. While older single-glazed windows may not insulate as well as modern double-glazed windows, the majority of energy loss typically occurs through gaps between the sashes and frame or between the frame and the house, rather than through the glass itself.

Repairing Broken Glass

One of the most common window repair issues is broken glass. If a multi-paned window has a single broken pane, it’s often possible to replace just that pane rather than the entire sash. This can be done by a professional glazier or, in some cases, by a skilled homeowner. For single-pane windows, broken glass can be easily replaced by a glazier or the homeowner.

Fixing Stuck or Slow-Moving Sashes

Another common window problem is sashes that are difficult to open or close. This is often caused by broken sash cords on windows with weights, or by loose or broken springs on spring-loaded sashes. In most cases, these issues can be repaired by a professional window repair service or a skilled DIYer.

Repairing Window Frames and Casings

Over time, window frames and casings can become damaged by weather, pests, or general wear and tear. Damaged drip caps, window casings, and exterior trim can often be repaired by replacing the damaged components with new, rot-resistant materials like aluminum or PVC. This can help improve the window’s appearance and prevent further damage.

Addressing Minor Water Leaks

If a window is leaking water, it’s important to determine the cause. In many cases, water leaks are caused by issues with the home’s drainage system, such as poorly maintained gutters or downspouts. If the window itself is the issue, it may be possible to repair the window seals or weather stripping to prevent leaks.

Improving Energy Efficiency

While repairing old windows can help improve their appearance and functionality, it may not significantly improve their energy efficiency. In most cases, the majority of energy loss occurs through gaps and cracks in the window assembly rather than through the glass itself. However, repairing these gaps and cracks can help reduce drafts and improve comfort.

For homeowners who are primarily concerned with energy efficiency, there are several options to consider:

• Installing storm windows or interior window inserts, which can provide an additional layer of insulation without replacing the existing windows
• Applying window film or tint to reduce solar heat gain and improve insulation
• Upgrading to energy-efficient replacement windows, which can significantly improve energy performance but may be more expensive than repairing existing windows

Ultimately, the decision to repair or replace old windows will depend on the specific condition of the windows, the homeowner’s budget, and their priorities in terms of appearance, functionality, and energy efficiency. By working with a reputable window repair service or doing some research, homeowners can make an informed decision about the best approach for their home.