When a basement leaks at multiple points — along the floor joint, through several cracks, damp patches after every rain — the original damp-proofing and weeping tile have reached end of life. The durable fix is from outside: excavate to the footing, clean and repair the wall, apply a rubberized membrane with drainage board, and replace the weeping tile so water has somewhere to go.
It's the most invasive thing we do, which is exactly why we don't recommend it when a $500 injection solves the actual problem. When it is needed, sections can often be done (the wet wall, not the whole perimeter) to keep cost sane.
Exterior stops water from touching the wall: the gold standard. Interior systems manage water that gets in — cheaper, and right where excavation is impossible (additions, shared walls). An honest contractor will tell you which your situation calls for.
Modern rubber membranes are rated 30+ years. The weeping tile is usually the first thing to silt up — which is why we install cleanout access.
The excavation trench is about 3 ft wide along the wall. Plants in that zone need relocating; lawns regrow. We photograph, protect, and put hardscaping back.
Water against a wall over winters does compounding damage — freeze-thaw widens every path it finds. A spring leak left two more years is usually a bigger job. At minimum, fix grading and downspouts now.