Every twelvemonth we become calls from a customer or two request why they have condensation on the outside of their brand-new windows.  Their one-time windows didn't exercise this, and so the new ones must be defective!  Not at all!  In fact, the new windows are performing ameliorate than e'er before.  Information technology is not unusual to have condensation on the outside of new energy efficient windows; in fact, it's perfectly normal.  It may seem like a foreign phenomenon, only once you lot understand what's going on it makes total sense!

Condensation forms on an object when that objects surface temperature goes below the dew signal. The dew point is defined as the temperature where the air is 100% saturated with wet – or where the air is at 100% relative humidity.  Some new windows have condensation because the surface of the window is beneath the dew signal.  This is NOT a bad thing. What is happening on those windows with the condensation is that the window is performing exactly as designed…Information technology is blocking the heat from inside your home from reaching the outside of your home thus allowing the outside windows to exist libation than the morning dew point.

Low-E glass acts basically like a reflector for estrus and free energy, and is truly a very sparse blanket of metallic.  And then, if y'all have humidity come against cold metal (like breathing on a common cold mirror, or when y'all get a cold tin can of soda on a hot day) you lot're going to accept condensate.  H2o will dewdrop on the common cold surface.  For Low-Due east windows what this means is that the Low-Eastward keeps the glass temperature closer to the exterior temperature than the inside temperature.  What'south slap-up about that is that it keeps your inside temperature from fluxuating and you lot take a more constant temp inside your home.  This means y'all don't run heating or cooling utilities equally much.

Why does it practice it on some windows and non others?  Whether or not a window develops exterior condensation is actually a rather complex flake of environmental and performance issues. For case, you are much less likely to develop condensation on a cloudy night. Whatever trees or other obstructions close to the windows? Bushes under the windows? Even the length and bending of the soffit or other overhangs can affect the formation of condensation.  Operable windows with screens can sometimes only have the condensate on the fixed console of the window.  The half that has the screen is the operable half and can allow in a minimal amount of air infiltration; enough to cool the inside glass to a similar temperature of the outside glass.

The condensation on the new windows is a sign that your windows are better insulated than they always accept been.  However, some don't similar the expect even though information technology goes away adequately quickly.  What can you lot do?  Since nosotros cannot control the outside dew signal temperature (or relative humidity), the options for preventing exterior window condensation problems are to warm the inside surface of the window as a way to warm the outside surface.  A tiny change in either temperature or humidity might heighten or lower the dew signal simply a little bit and you might see a whole unlike level of condensation.  Even raising the temperature in the room by a few degrees can make a deviation.  So tin using a fan, or simply opening the window.  Exterior shutters or even shade from copse will lessen the effect.

In summary, condensation occurs when a surface falls below the dew point temperature of the air. The outside glass in an energy efficient window will be closer to the exterior temperature, and the inside glass will be closer to the inside temperature. The glass in an inefficient window volition be more than heavily influenced by both within and outside temperatures.  The condensation or fogging on the outside of a new window is quite common and perfectly normal.  At Glass-Rite we employ high performance SolarBan lx & SolarBan seventy Low-E drinking glass and Argon gas in between the two panes to get the best insulation around.  This awesome insulation can sometimes exist physically seen by exterior condensation.  Just call up that this ways the window is doing its task.  To larn more, or to see how we make our drinking glass units, please terminate by our shop and showroom and we'd be happy to show you around!  Please contact us for a free estimate on new windows or if you take any questions.