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
- 17 Tiny Bathrooms We Love
- Make Your Bed: 9 DIY Headboards
- Insanely Easy 60-Minute Home Improvements
- Space-Saving Solutions for Tiny Bedrooms
- 9 Perfect Color Combos for Your Home
- 22 Tiny Houses We Love
- See the Most Highly Anticipated Colors for 2015
- What's the Best Color for Living Rooms?
- Favorite Space-Saving Double-Duty Furniture
- 10 Low-Cost DIY Home Security Solutions
- Redecorate Without Spending a Dime: 10 Ideas
- 10 Houseplants You Can Grow Anywhere
- 9 Amazing Mobile Home Makeovers
- 10 Doable Designs for a DIY Rug
- 9 Alternative Uses for Toothpaste
- Live Large in a (Very) Small Space
- 8 Cheap and Unique DIY Nightstands
- 15 Eye-Catching Options for Your Front Door
- Supersize Your Small Bath with 8 Pro Tips
- Don't Try This at Home: 7 Dangerous DIYs
- 10 Simple Woodworking Projects
- Is There Anything Vinegar Can't Do?
- 7 Incredible Uses for Salvaged Lumber
- 12 Tiny Gardens You Can Grow on a Tabletop
- 16 Sneaky Storage Ideas
- 10 Surprisingly Smart Solutions for Junk Drawers
- Bright & Bold Colors for Your Front Door
- DIY Bookcases: 16 Easy Project Ideas
- Don't Make These 7 Fireplace Mistakes