Framing a Window

In our attempts to make our home a little more custom, we have slowly begun the process of framing our windows.  (So far we have four done!  Wahoo!)  Today, I’m going to walk you through the process of adding trim to create a window frame.
The builders added a window sill and a small piece of trim below the window. In our situation, the window sill juts out about an inch into the dry wall.
First, my husband used a crow bar to remove the trim below the window sill.
Next, Mark measured the small piece of window sill that juts into the dry wall & drew the measurements on the back of a piece of trim.  He used a jig saw to cut the horizontal lines & a utility knife to cut the vertical line.
This is what the piece looked like after knocking out the small rectangle.
Next, Mark checked to make sure the molding fit over the window sill & then marked & cut where the 45 degree angle would go, using a miter saw.  For the mitered angles, measure the inside of the window & that is where you begin your cut.  He then marked the top 45 degree angle on this piece & cut it & then slid it into place.
After several finishing nails, he was ready to move on to the next piece.  After measuring twice & cutting once, he cut the 45 degree angles for the bottom, top, & side pieces & nailed them into place.
Finally, Mark caulked the mitered angles & nail holes.  When using caulk, make sure to have a wet cloth handy to immediately wipe off the excess.  You can also fill these gaps & holes with wood filler, but my husband prefers the clean, smooth look of caulk.
And here is the big picture:
You’ll probably notice that we chose not to add trim between the two windows.  We did this because the space was too big for just one piece of trim & too small for two pieces.
So, are your windows trimmed out?


  1. Our new house has beautiful window frames and door frames as well. It is definitely one of the great things about an older house! They have so much character! :)

  2. I have not even thought about the trim on the house windows. you make it look easy!

  3. This is a great upgrade. I agree it's look better without the trim between the two windows. He did a great job on trimming the entire window. I will be thankful now that our windows were pre-trimmed before we moved in. I do like that y'all kept the window sill though.

  4. Erin- I'm jealous! This house is definitely lacking in the character department!

  5. Adding the frame trim certainly gave your window a new look. Maybe you can also add some colors to the window frame. You can perfectly express your uniqueness and character through the kind of color you apply on your window. Pick the right kind of color, and you can certainly brighten up the look of any room. Anyway, it definitely looks like the framing was a huge success!

    @Marla Hinds

  6. Nice! Mark did a wonderful job with the trimming. And since he has tried DIY-ing it, it’ll be easier to alter the trim style when you feel like customizing it again. The new look of your window definitely made your house look more welcoming and cozier.

    Raymonde Birch

  7. Congratulations for putting up the frame successfully! Looking through the pictures, I was like, “Man, this seems easy; I think I can do the same thing for my window.” But as I went along, I realized cutting the wood and fitting it perfectly to the windowsill was a bit of a challenge. So, I would have to commend you for that great job. Very nice!

    Leif Clancy

  8. My "builder" home does not have fully framed windows either - (except the framed 6 in our livingroom). My question is -- our unframed windows have a windowsill only like yours - and it's wall/texture everywhere else, including the inside of the window where the blinds sit. Were yours framed on the inside of the window or did you leave it drywall? I personally wouldn't care if we framed our windows and just painted the inside white, except our walls have texture - ARGH!
    I couldn't tell from these photos if you had the same issue with yours. Thanks for the info - this gives me hope for my windows!

  9. Our windows are just drywall on the insides, around the windows. We just left it as is & caulked where the trim met the insides (if that makes sense). Then we painted the insides & the trim to make it look cohesive. Our drywall is not textured though...I wonder if you could just sand the texture down? Hope that helps!



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