When installing window molding start at the top.
How to install trim corners around windows for vinyl siding.
After the insulation is in place you want to install trim around the inside to finish the job.
It s all done by eye with a sharp pencil a miter saw and an 18 gauge nailer.
Install j channels at doors and windows and under roof eaves and rakes.
You can use wood trim from the hardware store or some other product.
Install the tops first then the sides and then the bottoms of the window surrounds.
Cut a 45 degree angle on one end of the trim and hold it so the short end of the angle.
Many people myself included are very sensitive to insulation.
But in my experience the best product is a vinyl flat trim that matches the window frame.
Instruction on how to install exterior 2x4 trim around a new or old window.
Most trim carpenters don t even use a tape to trim windows.