Negative slope but no issues
I bought a house last year with a negative slope back yard going to a positive slope in the front yard. House inspection showed no leakage stains in foundation on inside of basement. The house is 1975 built. We recently renovated the basement and confirmed we found no staining, mold smells, etc.
The back yard is rife with huge Elm tree roots.
Should I be concerned even after all these decades of improper water drainage? I don't even know if i have a sump pump.
I ask as we are planning on redoing the back yard landscaping and are investigating the need to put in a french drain.
Wherever the grade is pitched towards your house, it should be graded away at a minimum of 2% or 1/4" per foot. An alternative would be to put in french drains. You are lucky that you have had no damage so far, but as long as you are re-landscaping, for peace of mind, I would address this.
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"Susan, what a pleasure it was to work with you. You made me feel like I was your only client - responding late at night and always so quickly! Your design is amazing and we only hope we can do justice to it when we plant . You have such fantastic ideas and you are so open to suggestions and changes. Loved working with you - now if you could only come to Canada and plant it !!! "