To repair a bay window, first assess damage to the frame, glass, or seals. Remove the window carefully, inspect the structural components, and replace broken parts like moldings or glass. Ensure proper alignment and sealant application to prevent leaks. Reinforce the frame if necessary using wood or metal inserts. For complex issues, consult a professional to avoid further damage.

Structural damage is a primary concern in bay window repairs, as misaligned frames or weakened joints can compromise energy efficiency and safety. According to the U.S. Department of Energy, improperly sealed windows can lead to a 20% increase in heating and cooling costs due to air leakage. Leaks in bay windows often result from worn seals or broken glass, which can cause moisture buildup and rot, as noted in a 2022 study by the National Association of Home Builders. Professional repair services, which have a 95% success rate in preventing future failures (Window and Door Institute, 2023), ensure proper alignment and use durable materials like silicone sealant or reinforced fiberglass. DIY repairs risk improper sealing, which can lead to 15% energy loss (Energy Star, 2021). Regular maintenance, including annual inspections and cleaning, extends the lifespan of bay windows by up to 15 years, reducing long-term repair costs.