If the wall in my basement is leaking very slightly, is the main/only solution to the actual water issue to add grading outside? What else?

It is under a deck, which I can rip up a bit and fill with dirt, but is that likely to solve it?

We noticed from slightly bubbling paint and efflorescence.

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[–] 8 points 5 months ago

Iirc, all basements leak if the ground is saturated. Basement walls are made if concrete or concrete block, which is porus. With enough water on one side, it will eventually start seeping through. This is why ground slope around the house is important, and adding soil and gravel is actually a ling term fix in most cases - as long as the water runs away from the house rather than pooling around it, it won't saturate the ground and the basement won't seep.

Caveat - I'm no expert. But friends had this problem, and proper drainage solved it

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