Some Known Details About Door Installation Washington DcStep 11Attach the trim, Nail the trim to the door frame with No. Door Installation Washington DC. 4 finish nails. Nail the trim to the mounting with No. 6 surface nails. In this article, we'll concentrate on installing basic prehung doors. These have a door jamb that's 4-9/16 in. vast and also are made to match a 2x4 wall that's 4-1/2 in. Door Installation Washington DC.This offers just sufficient of a fudge factor to have the jamb a bit…See More