Follow the Water: A Home Exterior Trouble Map

Water problems around a home rarely begin with dramatic flooding. More often, the first clues are subtle: a muddy patch beside the foundation, peeling paint near a window, overflowing gutters, or a walkway that stays wet long after a storm.

Knowing where to look after heavy rain can help homeowners catch drainage problems before repeated moisture causes more expensive damage.

Start at the Roofline

Rainwater should move from the roof into gutters and through downspouts without spilling against the house. Overflowing gutters may indicate clogs, improper slope, damaged sections, or inadequate drainage capacity.

Look for water stains on fascia boards and siding as well as erosion directly beneath the roofline. Downspouts should discharge water away from the foundation rather than creating puddles beside it.

If gutters repeatedly overflow despite being clear of debris, gutter companies can inspect the system for sizing, pitch, attachment, or drainage problems.

Check the Ground Around the Foundation

Walk around the house shortly after rainfall. Soil should generally direct surface water away from the foundation. Low spots beside the house can collect water and keep foundation materials exposed to moisture.

Watch for washed-out mulch, soil erosion, standing water, and areas where downspout discharge has created channels through landscaping. These patterns reveal how water actually moves across the property.

Inspect Doors, Windows, and Siding

Exterior openings create additional opportunities for water intrusion. Check around windows and doors for deteriorated caulk, gaps, damaged trim, or staining.

Siding deserves attention too. Cracks, loose panels, damaged boards, and openings around exterior penetrations can allow rainwater behind the exterior surface. Once moisture gets inside a wall assembly, the source may become difficult to locate.

Look at Patios, Driveways, and Walkways

Hard surfaces change drainage patterns because water cannot soak directly into the soil. A patio or walkway that slopes toward the house may send runoff directly to the foundation.

Cracks and settled sections can also collect water. Pay particular attention to places where pavement meets exterior walls, garage entrances, or foundation materials.

A useful water trouble map follows rain from the highest point of the house to the lowest areas of the property. Start with the roof and gutters, continue down the siding and foundation, and finish by examining soil and paved surfaces. Repeating this inspection during or shortly after a heavy storm can reveal drainage patterns that are almost invisible on a dry day. Look over the infographic below to learn more.