How to Trim Out a Basement Window (DIY Drywall Return on a Basement Window - Finish Your Basement!)

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Learn how to Trim Out a Basement Window with this DIY step-by-step guide. For my basement windows, I used the "drywall return" method.Show more

When finishing a basement, you will likely need to install drywall and trim around the basement windows. However, the drywall return method of finishing basement windows requires no trim. Although there are many ways to successfully “trim out” a basement window, using drywall is both a simple and inexpensive method for giving your basement windows a finished look. This article will also show you how to cut a window sill out of common lumber.

To install drywall a drywall return around a basement window, start by cutting drywall for the top and sides of the window. Cut they drywall such that it contacts the window’s frame on one side and so that it is flush with the wall drywall on the other side. Then, install corner bead and finish the drywall with joint compound. Caulk any joints between the drywall and window.

To cut your own window sill for a basement window, select a piece of lumber that is approximately 1.5″ wider than the depth of the basement window cavity. You may need to “rip” the lumber to a suitable width using a table or circular saw. Cut the off the sill so that it is 3″ longer than the window cavity on both sides. Next, use a router to give the window sill a rounded edge and use a jigsaw to cut the penetrations on both sides of the window sill – leaving a 3″ overhang on each side. Finally, caulk any gaps and paint the window sill (if desired)

This video will outline every single step outlined above - in detail.

For more information on How to Trim out a Basement Window, you can read my blog article linked here: https://atimprovements.com/how-to-install-drywall-and-trim-around-a-basement-window/

Additionally, if you need to replace a basement window, you can watch my "How to replace a basement window" Video linked here: https://youtu.be/9esOJYNqRAc

This Basement Window Replacement and Trim out Project is part of my basement finishing series. See additional videos below:

Episode 1: How to Install Rigid Foam Insulation
https://youtu.be/Qt4mvnVrCpE

Episode 2: How to Frame Basement Walls
https://youtu.be/ERJxLOlUSz0

Episode 3: How to run electrical in a basement
https://youtu.be/0PnwBzhQvrY

Episode 4: How to Frame around HVAC and Pipes in a basement
https://youtu.be/KdHIDL0fxnI

Episode 5: How to Drywall a Basement
https://youtu.be/amEmCbQYsgg

Episode 6: How to install LVP flooring in a basement
https://youtu.be/paHk_b3vGAs

Episode 7: How to Install a Drop Ceiling
https://youtu.be/toChex7jCSI

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Thank you so much for watching!

*All content on the Andrew Thron Improvements YouTube channel reflects my own opinions. Please seek out guidance of professionally trained and licensed individuals before making any decisions. Links in the description may be affiliate links.