I recently bought a custom ICF house built in 2010. With the recent spring melt, I noticed a small puddle form on the floor next to an exterior wall in my basement. I reluctantly took down the drywall on that segment of wall and found brown stains and what look like drip marks between the ICF blocks (see attached pictures). Is this a sign of exterior water intrusion all the way through the layers of the wall? Or could this be stains left over from the initial concrete pour? Also note: right below the window there is a small gap between the ICF blocks with what appears to be yellow foam sprayed in there. Is this normal/acceptable practice? For context, the waterproofing on this house seemed decent. There are exterior and interior french tile going to a sump pump, exterior of foundation has waterproof membrane + Delta dimpled membrane. Thanks in advance for any input you may have! Pictures: https://imgur.com/a/QIzC09S

Those stains being under a window, my first inclination would be improper flashing around the window is letting water in around the window frame that is finding its way inside.

Have you closely inspected the window flashing for possible water entry points?

You might also spray the area around the window with a water hose on mist/sprinkle (not solid stream) and see if you can find any leaks on the inside.

I agree with arkie6. It is likely an issue with the window, NOT the ICF/WP. Might be an easy fix - just apply a bead of silicon around the window to seal the window from the exterior to the outside finish.

It looks like you have a window well at this location, correct? Be sure water doesn't pool in that window well during a melt/heavy rain. Weeping tile should be installed inside the window well down to the footing to provide drainage at this spot. You may also want to either keep snow shoveled out of window wells or install a cover to keep snow from entering the window well.

Also - make sure you have positive drainage outside at this location (ie, ensure no water is pooling along the foundation at this location and downspouts have 6'+ extensions attached). But like I said, my guess is that is is a window issue, not a drainage issue (assuming no water pooling in your window well).

And the spray foam is not concerning. The installer filled a larger gap than normal with the product, but this would cause/prevent your water issues.