Yep! Rango has got the answer. Cheap windows are the primary cause of these condensation problems. Metal sweats due to temp differentials. In rushing cold air contacting the warmer air inside the home equates to condensation, similar to Mother Nature and the precip cycle. If these windows were installed up north the manufacturer would go O-O-B in a matter of months. Vinyl clad windows have replaced the cheaper aluminum framed windows. You can feel the air (drafts) when you place your hand near the window frame. I owned a large business heat/cooling efficiency and this was indeed the major culprit. Good luck to all who are experiencing this situation and pray for warmer days.
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