Why Are Your Windows Wet Every Morning—and What Can You Do About It?
Why Are Your Windows Wet Every Morning—and What Can You Do About It? Water on the inside of your windows is trying to tell you something about your house. You pull back the curtains and find droplets running down the glass. The sill is damp again. Perhaps there are small black spots around the frame. It is tempting to wipe it away, turn up the heating and carry on. But if it happens repeatedly, it is worth asking three questions: Where is the moisture coming from? How can it leave? Which surfaces are getting cold? Occasional misting that clears quickly is not necessarily a serious problem. Persistent water, damaged finishes and mould deserve attention.[1] For me, this is a useful Going Green subject because it connects energy saving with something more fundamental: having a comfortable home that works properly. Saving heat matters. So does giving moisture a way out. Why water appears on the glass Water vapour is an invisible part of indoor air. When air next to a surface cools to...