Quote Originally Posted by dj1 View Post
There are two things I don't like about this method of window replacement, as mentioned already:

1. You end up with a smaller window. Yes, it will be only a couple of inches smaller, but window size in bedrooms has to meet certain code, and you don't want to be in violation of that code.

2. Your new window will not be 100% leak proof. Unfortunately, leaks may start happen after the warranty is up and the installer is nowhere to be found.
I just met with the second situation you mentioned. I have replaced four of my windows last year and it performed well till last winter. Now it is leaking like anything. I missed to have a water test right after the installation. Can Vulkem 116 help me out of this? I got some recommendations with dow corning contractor's sealent also. Which one is the best to save my vinyl replacement windows?