In fact, the new windows are performing better than ever before. Condensation forms on an object when that objects surface temperature goes below the dew point. Some new windows have condensation because the surface of the window is below the dew point.
This is NOT a bad thing. What is happening on those windows with the condensation is that the window is performing exactly as designed…It is blocking the heat from inside your home from reaching the outside of your home thus allowing the outside windows to be cooler than the morning dew point. Low-E glass acts basically like a reflector for heat and energy, and is truly a very thin coating of metal.
Water will bead on the cold surface. For Low-E windows what this means is that the Low-E keeps the glass temperature closer to the outside temperature than the inside temperature. Why does it do it on some windows and not others? Whether or not a window develops exterior condensation is actually a rather complex bit of environmental and performance issues. For example, you are much less likely to develop condensation on a cloudy night. If you do see external condensation forming, take it as good news!
It means your windows are performing perfectly, keeping the heat within your home which in turn will reduce your energy bills. For more information on our energy-efficient windows , doors and replacement conservatory roofs give us a call on or contact us online today!
Why is there condensation on my new double glazed windows? January 12, What causes internal condensation on windows? How much water vapour is being produced in my home? Graeme Clarke November 27, Double Glazing. A lot of homeowners are surprised to see moisture build up on their glass after having their windows double glazed. Your double glazed windows should not have any condensation on the glass surfaces that face inwards — the two surfaces that come into contact with the air space in between the two panes of glass of the insulated glass unit, or IGU.
If you notice any moisture here, you have a problem with your double glazing. It is supposed to for the most part. There is a silicone seal in the IGU that protects the gap in between the glass panes from any air or moisture. Even on the exterior and interior surfaces, you should notice less condensation when you have energy efficient windows.
If you see some fog on the glass and start worrying — 'wait a second, should I get any condensation on double glazed windows? One way you can find out is, if you can wipe the moisture off the glass with your hand or a cloth, either from the inside or the outside of your home, the condensation is where it should be. It should, however, be considerably less than you ever noticed before you had insulated windows. What about new double glazed windows vs. Thermawood's patented retrofit double glazed windows — does one get less condensation than the other?
However, in order to set your windows up for a long-life without worrying about moisture damage, mould growth, and a failed double glazing unit, you need a way for any moisture that does get in your windows to get out, which is exactly what Thermawood created with the patented draining system for retrofit double glazing. With double glazed windows, the improved thermal insulation helps to keep the glass and the surrounding air temperature at about the same level.
Because of this relative temperature consistency, there is less of a chance for moisture to form on the glass surfaces. It will pretty much only be impacted by your indoor air temperature. So, you have a smaller temperature difference between the glass and your indoor air, and therefore, a reduced likeliness of condensation.
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