Winter is coming and with that window condensation starts to become an issue in many homes through Ireland. Typically, the condensation is present inside the windows in single glazed original windows.
Window condensation happens when the air inside the house that is filled with moisture hits a surface that is colder. Condensation is caused by a conflict when heat hits cold. Glass by its nature and hence windows, tend to be colder when the outside temperature drops. Often when you wake up in the morning there will be condensation on the inside of the bedroom window from breathing and the drop in overnight temperatures. Once the sun comes up and the heating comes on, that condensation will be less obvious and can evaporate.
Other contributing factors to high moisture levels inside the house are showering and bathing, cooking and washing up in hot water.
We tend to spend more time indoors nowadays and try to make our homes more energy efficient. This leads to the house being sealed from all draughts.
In a traditional Victorian house that I know well (the house I grew up in!), on a frosty morning there can be a little pool of water on the sill from the condensation. If this isn’t dried up, it will start to cause rot to the timber itself. It is a problem that needs to be identified and worked on.