Tips or tricks on how to close this mitered edge

[vinny186]

I'm trying to miter an old piece of trim to new but the old trim has deteriorated a bit. It's so large that I don't think saw dust and glue will work. You can't tell from the pic but the trim pieces are contacting one another at the top.

 

[user 4883]

Corners rarely come out to be 2-45 degree angles.
You'll have to custom cut the new piece to mate to the old piece.

 

[mail.sarakapoor]

use a sharp saw blade to cut perfect miters with a dull blade, one with too few teeth or one that's designed for ripping cutting a 45-degree miter on a 1x3. If the gap is larger, you'll have to recut both boards or the trim profiles won't line up. Here are some trick glue and seamless fit. Apply a thin layer of wood glue to the end grain of each piece before you assemble them.

 

[vinny186]

I ended up stuffing the gap with bits of shims, sawdust and glue. Then sanded and painted. I'll try to post some pics.

 

[Flyover]

I ended up stuffing the gap with bits of shims, sawdust and glue. Then sanded and painted. I'll try to post some pics.

Pretty much what I'd have recommended.