Hello everyone! I'm looking for some advice on my basement remodel as I seem to have a situation I haven't been able to find an answer for.
The house was built in the mid 60's and I have been living in it for 3 years now. It seems at some point there was water 'issues' in the basement that have been professionally addressed with a retrofit french drain and some outdoor measures as well. Since I have lived here, there has been no bulk water problems at all. The basement will however get pretty humid in the summer & we have used a de-humidifier.
I'd like to remodel about 80% of the ~800sq ft space into living space and would like to mitigate any possible chances for water/mold. Reading through the forums and the building sciences website I think I have a decent plan, but I don't feel right about one issue i'm having with the french drain retrofit. There is a membrane associated with the french drain protruding a few inches from the poured concrete floor around the perimeter of the entire basement:
Here is a cross-section of how I plan on dealing with it:
So I was wondering what everyone's thoughts were about using the 6 mil poly to bridge the membrane gap under the bottom plate of the perimeter walls? There will be an air gap that i don't think I will ever be able to avoid because of the existing membrane!