Window Repairs: Don’t Sweat The Small Stuff

Window Repairs: Don’t Sweat The Small Stuff

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Are you noticing condensation on the interior of your windows? Well the short and simple reason that it happens is because the surface temperature of the window is below that of the dew point temperature of the air in your home. It all seems very simple and innocuous, but it could be that the interior temperature is being negatively affected by damaged windows and could lead to mold growth.

Dew point is measured by saturation vapor density. When the air reaches 100% relative humidity, it can no longer hold moisture in a vapor form. It then condenses on tables, windows or wherever the air has made contact with warmer air.

In order to remedy the formation of condensation on the surface of windows, you would either need to lower the dew point temperature in your home to a level below the dew point temperature of the window itself. Or, you would need to increase the window surface temperature to be higher than the level in your home. Some popular options for decreasing condensation on interior windows are 1. Circulating the air. This can be done using the clockwise rotation setting so that the warm air pushes off the ceiling and down toward the floor. Another method is buying a dehumidifier. An automatic dehumidifier will turn itself on and off as needed but a manual one will be fine if the price is too out there.

A home hygrometer measures the relative humidity in your home. If it reads 60% and the temperature of your home is 70 degrees, your dew point temperature will be about 51 degrees. This means that if the window's surface temperature is below 51 degrees, condensation will occur.

The interior surface temperature of a single lite of glass, when the temperature outside is 0 degrees F and the inside air temperature is 70 degrees F, will be about 16 degrees. Adding a storm window on the outside causes the inside lite to increase to about 43 degrees!

Dual pane glass with a low E coating and an argon infill will have a center-of-glass temperature of about 57 degrees F, which is a 14 degree improvement over a clear glass dual pane or a single pane with a storm window.

Whatever your individual situation is, we can help you to understand it better and to figure out a solution that will fit.

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