Our recently built house has good windows and was constructed very tight. Why are the new windows showing condensation?
Heres what is happening. The humidity level is so high that the condensation is forming on the colder surface of the windows. New houses still need ventilation too since they are constructed so tight (for energy savings) that the humidity from the new construction materials and the lack of any fresh, dryer air provisions causes the building envelope to retain a much higher level of the humidity. Just daily living itself (showers, cooking, and breathing) creates a tremendous amount of the humidity.