How Washington DC winters get into the house, from ice melt on hardwood and slush on stair treads to radiator dust, with the District's sidewalk rule and the Reagan National snow normals.
Washington winters are usually mild by northern standards, but they are long on freeze and thaw. Reagan National averages about 60 nights a year below freezing and 13.7 inches of snow, and every few years a much bigger storm arrives. The mess indoors comes less from the snow itself than from what everyone puts down to get rid of it.
This guide covers salt and grit on floors, entries in narrow rowhouses and busy condo lobbies, heating-season dust, and what to have ready for a big storm.
Under the 1991 to 2020 normals, Reagan National sees 13.7 inches of snow a year, with 4.9 inches in January and 5.0 in February, and about 3.7 days a year with an inch or more on the ground. It also averages 60.1 nights below 32 degrees, so slush refreezes overnight and gets salted again in the morning.
D.C. Code 9-601 requires owners of homes and businesses that front a paved sidewalk to clear snow and sleet within the first 8 hours of daylight after it stops falling. That keeps walks safe, and it also means rock salt or ice melt on nearly every stoop and front walk in rowhouse neighborhoods, ready to be tracked inside.
Salt residue leaves a white film on hardwood and scratches the finish as grit is ground underfoot. In a rowhouse, the entry often opens straight onto original floors and a staircase, so there is no mudroom to stop it.
Wipe up salt with a damp microfiber mop and a pH-neutral floor cleaner, then dry the floor. A small amount of warm water with a splash of white vinegar lifts stubborn white film from sealed hardwood, but keep vinegar off natural stone thresholds and unsealed wood. Never let slush puddles sit.
In the District, 56.9 percent of housing units sit in buildings of five or more units. Building staff handle the lobby, but salt and slush still ride the elevator into the unit on boots, strollers and wheels. Keep a mat inside the unit door, and clean floors near the entry more often from December through March.
Hallway carpets in mid-rise buildings dry slowly in winter. If your entry has carpet, vacuum it often and spot clean salt stains with a damp cloth before they set.
About 31.5 percent of District homes were built before 1940. If yours heats with radiators, dust that settled during the warm months scorches on the first cold days and spreads a burnt smell. Clean between the fins with a radiator brush or slim vacuum attachment before heat season, and wipe the top again midwinter.
Forced air homes collect dust on supply vents and return grilles. Wipe vents in place and replace the furnace filter on the manufacturer's schedule. A One-Time Deep Clean wipes reachable vents, fixtures and fans in place.
Blizzards affect Washington about once every four to six years on average, and the city's largest snowfall on record was 28 inches on January 27 to 28, 1922. When a big storm is forecast, stock extra mats and towels by each door, clear a spot for wet coats and boots, and run a vacuum through entries before the storm so the cleanup afterward starts from a clean floor.
Afterward, expect several days of tracked slush and salt as sidewalks are cleared. Plan floor care for the end of that stretch rather than the first day.
University of Maryland Extension notes stink bugs move into homes seeking shelter in the fall. Ones that got in during the fall can turn up around windows on warm winter days. Vacuum them up from sills and frames, then empty the vacuum outdoors.
Condensation on single-pane windows in older homes can wet sills overnight. Wipe sills dry in the morning so water does not lift the paint.
The questions Washington DC homeowners ask most often about this topic, answered plainly.
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