Your Arlington waterproofing and foundation specialists
Arlington homes sit on the Piedmont uplands just west of the Potomac Fall Line, where decades-old construction meets steep, water-shedding terrain. From the 1920s bungalows of Lyon Park to mid-century colonials in Arlington Forest and condos near Rosslyn and Ballston, we tailor every repair to how water actually moves through that specific lot.
Arlington's soils and terrain
Most of Arlington rests on clay-rich Piedmont saprolite — weathered schist and gneiss that drains slowly and holds moisture against foundation walls. On the county's many sloped lots running down toward Four Mile Run and the Potomac, surface runoff and a seasonally high water table push water toward the lowest point of the house, which is usually the crawl space or basement.
Common crawl space & foundation problems in Arlington
Arlington's housing stock skews old — many homes predate modern drainage codes, with original block foundations, hand-dug crawl spaces, and downspouts that dump against the wall. That combination produces chronic crawl space humidity, efflorescence on basement walls, and settlement cracks where clay soils shrink and swell through the seasons.
- Damp, musty crawl spaces under 1920s–1950s homes
- Seepage on sloped lots near Four Mile Run
- Efflorescence and staining on block basement walls
- Settlement cracks from shrink-swell clay
- Downspouts discharging against the foundation
Popular services in Arlington
Neighborhoods we serve in Arlington
We cover every Arlington neighborhood, including: Lyon Park · Clarendon · Ballston · Rosslyn · Arlington Forest · Cherrydale · Westover · Aurora Highlands · Columbia Heights · Bluemont. Don't see your neighborhood? We cover the surrounding area too — just ask.