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What is the cause of Condensation on new windows? Replacing older windows is one of the most practical ways to increase the comfort and energy efficiency of your home. One issue that you may face following a window renovation or a new build is condensation appearing on the glass. Not to worry, moisture is not uncommon on new windows and in most cases it is a short-term issue. Here are the main causes of (and solutions to) window condensation. Renovation If you install new windows in an older home, it tends to have the effect of sealing the exterior envelope. Where older windows often leak, which lets the home breathe, newer windows are designed to be airtight. During the winter, warm moist air has nowhere to go and appears as condensation on cold-surfaces – quite often on windows. If after replacing your home’s windows and entry doors, the condensation persists,…