Inspect basement walls, floors, joints, and windows for cracks, leaks, and damp spots
Clean gutters and downspouts regularly
Extend downspouts at least 6 feet away from the foundation
Grade soil so it slopes away from the house
Seal foundation cracks with hydraulic cement or epoxy
Apply waterproof sealant to interior basement walls
Install or repair a sump pump
Add an interior drainage system if needed
Waterproof exterior foundation walls with membrane or coating
Install or repair footing drains
Seal gaps around pipes, vents, and utility penetrations
Use a dehumidifier to control moisture
Repair window wells and cover them if needed
Fix plumbing leaks immediately
Improve ventilation in the basement
Maintain proper landscaping away from the foundation
Check for mold and remove it safely
Test for water entry after heavy rain
Consult a waterproofing professional for severe leaks