Water from uphill
A basement dug into a hillside takes water from several directions. Water from uphill, from the roof and from saturated soil all push against the walls. NOAA's engineering weather data for Drake Field lists a 100-year rainfall rate of 3.7 inches per hour, which is a lot of water arriving at once. Before paying for interior waterproofing, ask the contractor to check the outside: gutters, downspout extensions, grading that slopes toward the house, and window wells. Fixing the outside is often the cheapest part of the solution.
Waterproofing options
Interior drainage systems collect water at the base of the walls and route it to a sump pump. Exterior waterproofing excavates the outside of the wall and applies a membrane and drainage. Ask which the contractor recommends and why, what kind of sump pump and backup they'll install, and where the discharge goes. A sump discharging next to the foundation just recycles water.
Humidity and condensation
Some damp basements aren't leaking at all; they're sweating. NOAA counts about 768 hours a year when Drake Field's wet-bulb temperature is above 73°F, and warm, humid air condenses on cool basement walls and floors. A simple test is to tape a square of plastic to the wall for a couple of days: moisture under the plastic means it is coming through the wall, and moisture on top means condensation. Ask the contractor whether a dehumidifier, sealed ducts and insulation would solve the problem before any drainage work.
Radon: test before you finish
The Arkansas Department of Health's 2026 radon fact sheet says its county map shows averages, not the level in any home, and testing is the only way to know your home's level. It also says the department does not certify or license radon testers or mitigators, and Arkansas has no law setting qualifications for radon professionals. That means you should test before finishing a basement, and choose a mitigation contractor with a national credential, such as one from the National Radon Proficiency Program or the National Radon Safety Board. Test again after mitigation.
Ozark ground
Fayetteville sits in the Ozark Mountains. In the Arkansas Ozarks, the Springfield Plateau is underlain by limestone of the Boone Formation, rich in karst features. Water can move through fractured rock in ways that are hard to predict, and some basements hit rock or springs. If water enters in one spot regardless of rain, ask the contractor whether it might be groundwater following rock, and how that changes the plan.
Finishing a basement
If you're finishing the space, ask about moisture-tolerant materials near the floor, insulation that won't trap moisture against the wall, egress windows for any bedroom, and a dehumidifier or HVAC supply. Ask whether permits and inspections apply. A finished basement is only as good as the dry space under it, so make waterproofing and radon decisions first.