Originally Posted by gotogregg
It would be more energy efficient, but also would be a waste of time and money. That would be like paying for a new car but only getting the motor. The windows would be hard to open. The heat trapped in between the new window and the old window would cause the seals to fail and you would have constant condensation on the panes.
It seems easier to install the replacement windows as they are intended to be installed. Take out the old sashes and put the new window in their place. Better yet, if it's a new house you could just get new sashes from the company that made the windows and save even more money. I hope this helps. What are your reasons for wanting to try that? With energy efficient sashes you wouldn't need storm windows at all.-Gregg
"In the land of the blind the one eyed man is king." Tom Waits? Misery is the river of world?
Thanks for the feedback.
The windows are in the walkout basement...so they are full size. Efficiency for these windows is a close second driver. The primary driver is security. The window locations back to woods and are a prime target for burglars. The replacement window I am looking at is the American craftsman 9500 impact window with laminated glass.
It is my understanding that you only get the heat build up if the outside window has lowE...and it does'nt. It's just clear glass.
A few questions...why would the windows be hard to open and there is a couple inches of space between them?
Would'nt interior storm windows have the same issue with condensation?
Thanks for all the candid feedback.