We ordered and installed these in our daughter’s 1939 Storybook Tudor in Dallas almost 1 year ago. The home had rattling original windows, and external storm windows are not allowed in the historical neighborhood. Replacing many windows was not in the budget at thousands of dollars each. Thank goodness we duscovered your product! I am convinced had we not used your window inserts to stop the drafts from the original windows, she would have had major frozen/broken pipe damage or even frozen herself this week in Texas’s weather/power grid disaster. Thanks again!