To get the proper measurements for the top of the windows you will need to measure across the outside edges of the trim you just installed on the sides of the window.
Cutting metal j trim around windows.
Due to factors beyond the control of the drywall doctor we cannot guarantee against improper.
The metal siding will slide into the j trim so.
Start j channeling the window from the bottom make cuts on both ends of the j channel.
How to install j trim on steel buildings.
Cut and install the side j channels.
Cut and install the top j channel.
All of the trim around windows and doors forms outside corners.
How do you install j channel around windows.
Measure the width of the window.
Add 2 inches to that number and cut a length of j channel to this.
Cut the trim to the specifications of your measurements.
Tip 1 purchasing your trim.
At an interior corner the siding.
Having problems cutting corner bead.
This piece will typically fit on the left hand side.
Attach the j trim along the line that will form the upper edge of the metal siding.
Place the side j channel and mark it then mark the bottom j channel.
Then position the edge of the trim to the left of the saw blade holding it firmly against the built in metal fence for stability as you cut.
Nail the j trim horizontally along both sides of any interior corners.
Aluminum usually works best as it is easy to bend or mold.
Think of a picture frame.
Step 5 cut inside the j trim with the edge of your shears cut the inside of the trim on both ends to create a tab.
Easy video to learning from.
Vinyl diy cutting j trim for outside and inside corners.
Check the frame of the window and clean anything that is not gonna allow for a j channel to lay flat to the side of the window.
Cut and install the bottom j channel.