Does your lot slope towards your house? What about a patio or deck?
We recommend your downspouts have diverters or extensions on them to direct water at least 6′ away from the house and garage. Creating and maintaining adequate drainage slopes with proper lot grading around a building can reduce the risk of water leakage or seepage into basement and crawlspace areas.
Factors contributing to water penetration issues into basements / crawlspaces can include soil adjacent to a building that causes water to pond or that is flat / sloped toward the foundation; sidewalks that act as a barrier to drainage or that have a negative slope toward the foundation; planters that trap water; and, gravel that discourages drainage of water away from the foundation.
Water / moisture penetration into your home can cause all sorts of issues including damage not only to your personal belongings but the structure itself and or building materials such as wood & drywall. Of course, with entry of water into your home you run good chance of promoting mould growth too.