If you are a weekend warrior, you will inevitably need to install a window in an existing wall at some point.  If you have a house that is vinyl siding on the outside, and you have a non-load bearing wall, the following is a step by step that you can follow to the letter.  If you haven’t ever cut a new window opening, this article / guide will answer some questions even if your situation is a bit different.

new window existing wall

Here are some of the questions that I had going into this project.  Keep in mind, you could answer some of these with a little thought, but if you are like me, you will appreciate a little confirmation of your technique.

  • Should I cut open the interior wall or the exterior wall?
  • Do I need to frame in an header?
  • How much sheathing should I cut away?
  • What if there are power lines nearby?
  • When do I make my cuts on the interior / exterior side.

I am sure that many of you will find this helpful and you will be able to apply some of the basic techniques to your own project.

Good luck putting that new window in.

New Window in an Old Wall – Fine Homebuilding Article.

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