A question related to this one about projecting the costs to finish our basement.
We have a poured concrete foundation. I don't think it has been sealed yet, but our yard is graded, our downspouts have long extensions, and the soil build up around the foundation is low moisture retaining. Living in a very moist region (PNW, US), I have been very pleased by how dry our basement has been. Some atypical downpours have led to some hydrostatic pressure and seepage through the floor.
We would like to convert this basement to livable space. Our codes require a rather tall ceiling height. The floor is not level. It is mostly level, although it has a low graded curve reaching it's bottom at the center. I think self-leveling concrete is not an option because a) seems we'd need a LOT of it to increase this "bowl" shaped foundation perhaps 5-6" from its center (haven't measured this out) and b) we risk not meeting height levels.
Is it possible to lay down a moisture blocking barrier, and lay down sleepers instead of a subfloor? Further, is it possible to shim-up the sleepers so that we can lay level flooring on top of them that is no higher than the edges of the "bowl" shaped foundation? Lastly, can an engineer in fact tell whether it is possible to "take down" the edges of the foundation with a zamboni or other type of grinding device?