Water Entering Issue

[Tianyi Chen]

I am selling a house in Prospect Park, PA near Philadelphia.  The buyer is requesting a waterproofing specialist report for water entering issue in the basement because the inspector found some sign of water entering.   We know that these are the potential solutions: 1. sealed wall with waterproofing materials 2. grading 3. french drain.  We will have a couple waterproofing specialists to assess the issue but my agent said for sure they would recommend doing a drain.  My agent is looking for a professional structural engineer and he hopes an engineer could write a statement saying that grading plus new sealed walls will be the solution.