standing water in gravel beneath slab.
I am building two additions to my raised ranch. Both are framed up and roofed ( no gutters yet! ). I was festidious about waterproofing new foundation and installing footing drains which are working fine. Whilst cutting doorway in existing block foundation wall to connect the two basements, i was disapointed to see standing water in the gravel about an inch below the bottom of existing slab. I need to concrete the 1" x 3" piece between slabs but realize that preventing the moisture from permeating upwards is near impossible. I have no sump pump as being a raised ranch, never thought i needed one.
My thought was to install a sump pump in a nearby utility room, and use XPS insulation on walls AND floor ( sealing joints with spray foam/ tape) and installing laminate flooring over electric radiant heat. I mentioned gutters not being completed yet as this is probably not helping matters. My existing basement was finished with carpet on the slab and fibreglass batts/poly sheet on wood framing, none of which was done by me and all of which was a bad idea and is now a rotted moldy mess. Am i on the right track with pump/ sealed XPS ? any other solutions? Any help appreciated.