I tried this system on my house in the 90’s. Kept water off the floor in general, but, since the grading of the floor was to the center the water trapped in the perimeter ‘system’ didn’t flow around the perimeter as desired. Bottom line, it just kind of trapped the seeping moisture around the perimeter.
Did the inspection. What I saw was substantially different than the Mike Rowe video. The water barrier was installed on the exterior of the foundation which seemed to me to be a better way. The work is four years old. We had a pretty wet spring, so perhaps it is functioning.
I see those all the time down here in Alabama basements. It’s common. Not much to inspect, actually. If the pump is not sealed I’ll reach in and check to float to see if the motor comes on. Inspect it like you would a normal sump pump. In the report I note that a moisture remediation system has been put in place and advise the client to obtain all warranties for work performed.
I do not like this type of exterior - interior foundation water management systems.
Cheep. Throw your money away. This is not foundation water proofing.
There is still foundation capillary action.
1: The foundation stays wet.
2: Water is drawn into the home under the foundations footing and drilled weep holes and discharged 10 to 15 feet away to a single spot. Not even a drywell.
Write hard on the lot slope, foundation interior and exterior defects and defections.
From a barber to a company foreman in 4 months. Lol.
Whenever I see these systems or foundation repairs I put a note in my report that I recommend the client make inquiry with the current owner concerning any transferable warranty that there may be. Most around my neck of the woods have a one time transferable warranty.