My wife and i after living in a very old house for a long time are having a new house built.
Install vinyl siding around window with built in j channel.
Nail it to the wall but remember not to nail it tightly.
Provide a seamless transition between siding and trim that s durable protected and flexible.
For the window first position the j channel against the window casing.
The azek j channel trim series beautifully complements any style of siding for a fresh clean finished look that s easy to install.