Interior Windows frosting


Old 10-11-12, 11:14 AM
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Interior Windows frosting

double pain double insulated windows. Is it normal for them to frost up inside the house at indoor temps of around 60 degrees and outside temps of 32 degrees? Curtain covering window. It frosts at the bottom of the window.
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Old 10-11-12, 11:44 AM
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Yes...very's caused by high indoor humidity and lack of airflow across the windows.
Old 10-11-12, 03:11 PM
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I agree. The fact that the curtains are pulled will make the window even colder and more prone to sweat. The entire glass perimeter is susceptible to sweating, but the bottoms of the windows are usually colder due to the way convection around the glass works- cold air drops along the face of the glass... while the trim and window edges block warm rising air currents.

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