Find out how to convert an exterior space into a screened-in porch. This video includes a list of materials and a step-by-step tutorial for screening in a porch on a budget. Ready to enclose your front porch? First build out the frame with pressure treated lumber. Next, prime and paint the frame. Then staple the screen to frame. Cut off excess screen with a utility knife. Nail on some trim to cover the staples. Then install your screen door.