Measure across the top of trim on the outside of the door from the outside corners of both pieces of vertical trim that you just nailed on. Cut a piece of trim to that measurement. Nail the top piece of trim to the header frame, spacing the nails every 8 inches.How do you finish an exterior door?
Slide the door back into the hinges on the door frame and replace the hinge pins. Tap the pins into place with a hammer if necessary, according to Better Home and Gardens. With an attractive new finish on an exterior door, your house will instantly raise its curb appeal.How do you trim interior doors?
When trimming a hollow core door, take less than an inch off each side to avoid cutting into the void beyond the frame. The veneer face on hollow core doors also tends to splinter easily. To prevent splintering, score the cut line with a razor knife before sawing off the door.