seepage through French drains
In my experience, a french drain is placed just below the ground surface outside the house to attempt to provide surface water a way to run off before finding it's way down to the foundation, where you report problems on the inside.
With a hunidity level of 60% it could easily be a condensation problem. Indoor humidity should be no more than 40%. That is a level that is healthy for people but a house is happier at 15-20%.
To test, take a piece of plastic about two feet square and use duct tape to seal it down to the concrete floor for a few days.
If you find moisture under the plastice, between it and the crete, then the moisture is coming from still curing concrete or from water under the slab. If the moisture is found on top of the plastic, it is surely from condensation.
I am also not sure what is meant about meeting of new and old concrete. Is this just a patch where the old was cut out for drain material or was a whole new slab poured? Was a 3 or 4" perforated drain laid into stone under the slab? Was a vapour barrier used before the slab was poured? This picture is incompleete.
Periodic wet basement from suspected rising water table
Interior french drain + 2 sumps pumps
mystery waterfall leak in basement
Help! Water -still- In Basement!
- 15 Old House Features We Shouldn't Abandon
- 13 Lazy Cleaning Tricks for a Spotless Home
- Laundry Room Ideas to Knock Your Socks Off
- Insanely Easy 60-Minute Home Improvements
- 12 Sheds You Could Live (or Work) In
- Assembly Required: 15 DIY Kit Homes
- 7 House Sounds You Never Want to Ignore
- 10 Surprisingly Simple Woodworking Projects
- Worth It: 8 Renovations That Pay You Back
- Organize Your Life with 12 Dollar-Store Buys
- 9 Totally Amazing Mobile Home Makeovers
- Don't Make These 7 Mistakes in Small Spaces
- 20 Sneaky Storage Ideas
- 15 Totally Unexpected DIY Flooring Alternatives
- 7 Easy Budget-Friendly Backyard Makeovers
- 10 Closet Cures That Cost Less Than $100
- 11 Easy DIY Projects to Declutter Your Home
- 10 "Zero Dollar" Garden Hacks
- 10 Killproof Plants for a No-Effort Landscape
- 9 Insanely Easy 1-Hour Backyard Projects