Repairing Water Damage on a Window Frame?

by Sarah Szabo   Last Updated May 15, 2019 23:21 PM

My parent's house has had a leaking window frame for the last few years. I think that the water comes in from outside the frame.

I took a few pictures from outside: Window 0

Window 1

Window 2

Window 3

And the interior: enter image description here


How can I prevent further water infiltration and seal up the interior?

I've done some drywall repair projects before, should I just use my putty knife to scrape off the existing drywall and put on a new coat of drywall mud?

Or should I cut off the drywall and buy a new piece of drywall and screw/nail that in place and joint the edges?

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