Midway through the pandemic I decided to turn the old shed behind my house into the gym. The floor always seemed a bit creaky but I decided to think nothing of it and continue dropping stuff on it. Unfortunately this attitude, coupled with a 200lb sandbag and trying to clean too much weight, has resulted in 2 huge holes in the floor.
I recently started pulling up the carpeting (neighbor told me the pervious owner had someone living in the shed) and found that the flooring is on a really poorly made frame with some particle board and plywood over top.
Now I need to figure out what/how to replace this floor so that it will survive. Originally I was thinking of just adding additional braces to the existing frame, but I worry this won’t quite hold up. I want to instead put concrete down but have a couple questions:
- Can I pour concrete around a wooden frame? (see picture)
- Can I use old broken concrete as a filler so I don’t need to buy/mix as much? (there’s a ton of broken concrete on the side of the shed)
- If I put stall mats over the concrete should I put something between the concrete and mats?
Any advice would be greatly appreciated.