How to Replace Basement Windows

Installing your own replacement basement windows is a great way to save money, especially when you’re in the process of remodeling your home.  With the right supplies and tools, it is possible to replace a basement window in under ten minutes.

Measure the dimensions of both your old windows and the replacement ones to be certain the new window will align perfectly.  An improperly fitted window can cause a variety of problems.

When removing the old window, use a dry towel or a brush to sweep away any debris that might have settled around the area.  This will help ensure that your new window fits properly and seals to prevent drafts, leaks or any outside moisture from escaping into your home.

  • First, install your replacement basement window’s molding on the inside. Make sure that it’s properly seated so that it stays stable during the next step.
  • Next, install your window and molding from the outside.  Push the window in place from the outside. If you notice a small gap of 0.5 inches (1.27 centimeters) between the molding and the window, don’t be alarmed. This is normal and will happen.
  • At this point, take the window back out and begin adding caulking.  You should start by caulking the windows on the inside, following the instructions that your replacement basement window provides.
  • Then place the window back in the frame. If you need to adjust how the window is situated, use shims to keep it level. Once you’re satisfied with how the window appears on the inside, secure it in with screws in the way your window’s instructions specify.
  • Next, caulk the outside of the window.  Do this to prevent any air or water leaks around the outside of your window.  This can be the difference between a dry and a flooded basement in the summertime.

Saving a few dollars by installing your own basement window and gaining a bit of window installation experience can be more than worth it.  But if that’s more of a challenge than you want to undertake, you can always call 866-FIX-MY-HOME or go to enter your zip code above to find a location nearest you to arrange for a professional to do the job for you.