Dryer vent cleaning in Hamilton.

Nine homes in ten across 20158 are detached, built over a wide span: about one in six went up before 1960, one in five in the 1970s, four in ten since 2000. In an older house the laundry usually landed wherever there was room, a back porch or a basement corner, and the dryer vent line takes a short, crooked route out through the foundation or the rim joist. Since 2000 it’s often the reverse: a laundry room on the bedroom floor and a long run across a ceiling.

Winter is the season to watch. The Purcellville weather station, two and a half miles west-northwest, averages almost a dozen days a year when the high never climbs past freezing, and from January 25 to February 2, 2026 it logged nine in a row. On days like those the warm, wet air leaving the dryer meets a hood well below freezing, and frost can build on the flap until the opening narrows. A mesonet in Hamilton read 5 below zero on January 23, 2025.

Summer brings the wind. On July 25, 2010, thunderstorm gusts put at least thirty trees down across Hamilton, and on July 21, 2019 storm winds damaged a roof on Meadowlark Drive. A hood takes the debris in weather like that: a cracked louver, a flap bent open, a twig wedged in it. The U.S. Fire Administration says to check the venting behind the dryer to make sure it isn’t damaged, crushed or restricted; after a big wind, check the outside end too.

Hamilton’s volunteer fire department held its first meeting in July 1944, and Company 17 began in 1952 as Loudoun County’s first rescue squad; both work out of the Hamilton Public Safety Center on East Colonial Highway. The yearly cleaning on the card below is Ashburn Volunteer Fire and Rescue’s advice, from the same county system.