Hi all, I've done a lot of remodeling, but have not built a home before, so before I get a contractor and start asking stupid questions I thought some of you might help.
I have a concrete block building with a flat roof. The roof is "sunk" below the top edge of the block wall. The top of the wall is capped wtih angled concrete blocks for water run-off. I'm thinking about building a home/apartment on top of this space. It's 20 feet wide, 40 feet long. Can I span the 20 feet with floor joists without supports underneath? Do I need to remove the angled concrete to create a flat surface to build on? How do I ensure the block walls are an acceptable foundation? Thanks, Greg