The most common exterior drainage issues are:
Water pools near the foundation, downspouts, plant beds, or yard
Water is seeping into the basement, foundation, or crawlspace and causes stains and mildew.
Gutters are overflowing during rain.
Paved surfaces have an improper slope causing water traps.
Topsoil and mulch start washing away.
Cracked or uneven sidewalks or patios from soil erosion.