Start with the pattern of the leak
Look for the first visible wet spot, not only the largest puddle. A pipe penetration can leak when surrounding soil becomes saturated. A wall-floor joint can respond to pressure below the slab. Water that appears after a landscaping change may point to altered exterior drainage.
Penetrations, joints and localized repairs
Targeted waterproofing can address specific openings when their condition and the water source are understood. Surface caulk is not a universal repair. Material selection, preparation and access all affect the scope. Existing patches and surrounding deterioration should be evaluated before a new seal is proposed.
When exterior access is necessary
Some leaks call for exposing the outside of the foundation and addressing water protection below grade. Patios, pavers, utilities and landscaping can affect access. An evaluation should explain what needs to be opened, how water will be managed and what restoration is included.
Keep structural questions separate
Not every foundation leak is a structural failure, and not every crack is only a water problem. Displacement, bowing or movement may warrant evaluation by an appropriately qualified structural professional. Waterproofing recommendations should not substitute for structural diagnosis.