My way of finishing a basement at the cottage
The old basement has a wood framed load bearing wall upon which sits a beam down the middle of the length of the building, with floor joists spanning approximately 11 feet from this main beam to each outside wall. The exterior walls are concrete block, and were framed, insulated and had vapour barrier installed by my Wife about 25 years ago soon after she purchased it (It was built less than 30 years ago). There were three rooms in the basement, a laundry room, a spare bedroom (never used) and a large storage room with the wood burning stove. The basement is bare concrete floor, uninsulated slab.
My plan is to add a sump pit for the few times a decade the water table rises enough to intersect the basement (The house foundation is only about two feet above the high winter lake level), properly construct and insulate new walls, properly insulate and wet proof the floor. and then finish it as a work storage area, possibly putting a rec room downstairs, or more of a guys hang out, toy storage and project area.
To start off, here are two images of the aftermath of the flood, and how damaged the basement is.
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Just a guy who dabbles in lots of stuff learning along the way. I do have opinions, and readily share them!