Proper window installation / Discussions

...windows and doors that were all installed about ten years ago. My question is should I stuff the gaps with rockwool and seal it with tape on the inside?  Any suggestions will help. A good place to start is our page about How to Install Windows & Doors Correctly that includes a DIY window installation video, have a ...

...windows are south facing. Here is our page on how to install windows which may help on a few fronts, not just the rough opening. Proper window installation for efficiency and durability is a lot about stopping air leaks and preventing water leaks. That means air seals around the exterior of windows and sloping window s...