Install the tops first then the sides and then the bottoms of the window surrounds.
How to install window trim over vinyl siding.
Unscrew and remove the storm window from the outside of the window.
Along the tops install j channel trim with horizontal siding and base trim with vertical siding.
Cut the trim so it is two channel widths longer than the opening s width.
Place the piece of siding to be installed under the window along the bottom edge and hold it where it will be located.
Exterior window trim on vinyl siding if your home has vinyl siding and you d like to add vinyl window trim you will first need to remove the existing siding and j channel from around the windows.
How to install window casing for vinyl siding 1.
Lock the notched.
Install j channels at doors and windows and under roof eaves and rakes.
Pry off the vinyl siding and j channel from around the perimeter of the window.
Cutting and installing the siding 1.