Low-e windows keep homes cool … but may set neighbours’ property on fire

Low-emissivity windows, which are designed to keep homes warm in winter and cool in summer, have a rare but dangerous side effect when used with bowed glass. This type of window can act like a magnifying glass, focusing sunlight and potentially igniting fires in neighboring properties. While this occurrence is uncommon, it underscores the importance of careful installation and consideration of surrounding structures. The potential fire risk highlights the need for homeowners to weigh the benefits of energy efficiency against possible hazards.