Reattaching trim

HappyKayakers

Well-known member
We removed the valance above our door to get it recovered. While it was off, I noticed that there was about 2 inches of open space above the door because the rough cut for the door opening was too big. There was also space around the sides of the door. So I removed the wedge-shaped trim along the sides of the door and used spray foam to insulate all the way around. So, the problem comes when I try to reattach the trim. It was previously nailed in. I've tried 1.5 in finishing nails and 3/4 in wire brads. Neither can be driven all the way in with hand tools. My question for the factory is: What did you use to attach the trim? Any suggestions for reattaching?
 
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