Install the tops first then the sides and then the bottoms of the window surrounds.
How to install vinyl siding window trim.
Take the vinyl siding pieces removed earlier and cut them down to fit around the window.
Slide each siding piece into the j channel and secure to house with roofing nails.
Before installing door and window trim first caulk around the openings to create a moisture and air proof seal.
Install door window trim.
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.
Along the tops install j channel trim with horizontal siding and base trim with vertical siding.
Install siding at the top of a window or door in a similar fashion but this time set the siding on the window channel and use the window trim to mark the cut.
Cut and install new j channel along the sides and top of the window.
Available in a variety of colors and styles vinyl siding is widely used and favored by many contractors and do it yourselfers for its durability.