I know on my parents house the original builder/owner decided after it was finished to later enclose the huge open covered patio & convert it into a very large family/game room.
Only problem was since the original patio foundation/floor was never originally meant to have a brick wall standing around it's perimeter, there was no brick-step built into it for the brick wall to sit on. Without a brick-step built into the foundation's perimeter to help keep rain/water in check, they have had instances where some water got under the brick wall & inside the house through the brick weep holes during really strong rain storms.
If the original builder hadn't been such a dumb azz, he would have included some kind of flashing/barrier/seal/etc down at the wall/floor joint to help keep water out before laying the brick wall on the flat foundation/floor.
460 street '66 Ranchero.......................finished someday.
460 race '70 Maverick..........................finished someday.
All 'glass Top Sportsman '69 Mustang......ummm, check back when I win big playing the Texas Lotto, or online poker.
page. Some ancient & newer local race video.
Join the Poker Players Alliance (theppa.org). US online poker should NOT be turned into a crime.