Condensation on New Double-Hung Windows
We built our home in 2017. I researched and researched windows and settled with Simonton which had an average rating of third on most websites. I did build the house as energy efficient as possible (within budget) including spray foam walls, roof deck and floor. I live in western NC. I used 2×4 walls with the spray foam. The Simonton windows are double hung. The problem is moisture covers about 2 inches of the bottom of each sash in the winter time. Oh, and a door that is almost completely full of windows. The windows in the door drip water every winter day to the point it’s already buckled the floor which needs replacing after 3 years. The Simonton windows has mold and mildew each year which has stained the felt and looks terrible. Anyway, I’ve had an HVAC guy tell me my house is too tight; no air flow. I understand air flow, but the energy-efficient appears to be creating mold on my windows. Anyway, I just wanted to get your thoughts before I spend 3k on “whatever” the HVAC guy told me to get. I think it may have been a whole-house dehumidifier.
Thank you in advance,
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