Black window trim is very trendy and I've seen many home decorators changing windows from white to black and even painting white windows black. Luckily, our windows are originally black but they did not have window muntins to give them the extra cottage character I wanted. I found a window mullions kit online but the price was too high for my frugal home decor budget! So I came up with these DIY window panes and saved a ton of money while updating the look of our home! Keep reading and watch the video below to see how to make window grills (or DIY window muntins)!
Measure the window from top to bottom. Make sure you measure the height of the window where the velcro will be attached so you don't see the velcro on the opposite side of the window. My velcro pieces were white but my muntin sticks were black, so if the velcro is not hidden, you would see the little white circle.
Cut the wood trim according to your measurement. A hand saw is all you need but you can use a table saw if you prefer (I did this for some of mine and made several cuts at once to move things quickly). Home Depot has a cutting table in the store so if you have your measurements handy, you can cut all the pieces before transporting the wood trim!
Paint the pieces that you cut... hopefully, your windows are the same size, otherwise, I recommend keeping track of which pieces fit in each window. I spray painted mine for a quick application.
Before placing the muntin on the window, do a quick measurement to determine the placement of the muntin(s). Larger windows may need more than 1 muntin. I used an 8.5" x 11" piece of printer paper as a general idea for the size of the "squares" I wanted to create.
Attach the adhesive velcro piece on the muntin top and bottom. I used the flat side against the glass and the raised side in the front. Attach the connecting velcro pieces to the window.
Repeat for all the windows and/or doors as you desire.
The velcro makes it possible to remove your muntins if you need to clean or open your windows.
For the sliding glass door, I glued the pieces that overlapped so when we take down the muntins, it comes off the door as one large grid. The velcro is only on the frame of the door. We don't use our sliding glass door so we've never had to take them down. Keep that in mind if you use a sliding glass door often! You could also try placing one of the grids on the exterior and one interior and that might allow you to open the door with ease.