Reduce Dust in House: Why Old Homes Get So Dusty

If you want to reduce dust in your house, start with where it enters and where it hides, then deal with the surfaces. In an older home, that usually means air leaks, return ducts, floor gaps and a few dust-trapping furnishings. Wiping shelves more often is the last step, not the first.

It's very common for a vintage house to look dusty hours after cleaning, so don't feel bad if yours does. The building itself is part of the reason, and most of the fixes below are small and fairly cheap.

Save

Why is my house so dusty?

In a modern home, dust is mostly skin cells, fabric fibers and pollen. In an older one, the house adds its own: crumbling plaster keys, aging mortar, degraded insulation, and soot from old chimneys. Add air leaks that pull in outdoor and crawlspace dirt, and the supply never stops.

The stack effect pulls dirty air upward

In cold weather, warm air rises and escapes through attic leaks, recessed lights and roof vents. The house replaces it by drawing air in at the bottom, often from a basement or crawlspace. That air carries dirt with it into your living room. Sealing the top and bottom leaks usually does more than buying another gadget.

Old ductwork can recirculate wall dust

Houses with gravity furnaces or retrofitted systems sometimes use wall cavities as return ducts. Air then passes over bare studs and old plaster backs before it reaches the filter. As an architect, I'd ask an HVAC contractor to inspect the returns before anything else, and to tell you whether a higher-rated filter is safe for your blower. A filter that restricts airflow too much can strain the system.

If winter is when it gets worst, this guide to winter dust goes deeper on dry air and heating.

How do you stop dust from entering through windows and doors?

Start with the gaps you can see. Weather-strip doors, and add quarter-round or shoe molding at the baseboard with a bead of caulk behind it so the room perimeter stops leaking crawlspace air. Old mortise locks and keyholes pass air too, and brass escutcheon covers block it.

For windows, old weighted sash windows have pockets that open into the wall cavity. If replacement isn't an option, interior storm windows create a dead air space and keep the historic look. A heavy curtain on a hinged rod over a drafty front door also catches the first wave of street dust.

Other leaks worth checking:

• Pull-down attic stairs without weather-stripping, which act like a chimney into the hallway.
• Old can lights open to the attic. Gasketed LED retrofit kits close them off (for electrical work, hire a licensed electrician).
• An unused fireplace with an open damper. A tight screen or a chimney balloon helps.

Save

Which floors and rugs trap the least dust?

Hardwood boards in a 100-year-old house usually have gaps. Dust, pollen and pet dander pack into them, and footsteps puff some of it back into the air. A canister vacuum with a hard-floor or crevice attachment pulls it out better than a broom, which tends to push debris deeper.

Wool rugs are a good choice for softness. They hold dust but release it readily when vacuumed. I'd leave about 12-18 inches of bare floor between a rug and the wall, so the wood border still shows and the center of the room, where most walking happens, is covered. Old wall-to-wall carpet with a crumbling foam pad is better removed entirely.

For carpet you keep, a homemade carpet cleaning solution can help between deep cleans.

How to reduce dust in house with dogs

Dog hair and dander are a large share of household dust. The National Institute of Environmental Health Sciences notes that pet allergens circulate in air and can remain on carpets and furniture for months. The same page says that bathing dogs may decrease allergens if done at least twice a week. Ask your vet what bathing schedule suits your dog's skin and coat.

• Vacuum often, and choose washable covers for any sofa the dog is allowed on.
• Move floor registers to walls where renovation allows, because floor registers collect fur.
• Wash dog beds on a regular schedule.

Save

How to reduce dust in the bedroom

You breathe in the bedroom for hours, so it's the room to prioritize. Wash bedding weekly, and choose a tightly woven duvet cover such as percale or sateen. Loose weaves let feather and mattress dust escape.

If you have exposed brick in a bedroom, a matte masonry sealer locks in mortar dust and keeps the look. Skip skirted bed frames and sofas where you can, since the fabric hides dust you can't reach. Choose legged furniture so you can vacuum underneath.

Do air purifiers get rid of dust?

They help with airborne dust. A HEPA purifier in the bedroom catches particles that are already floating, but it doesn't stop the leaks that keep supplying them. Treat it as a second step after sealing and filtering.

Save

Styling choices that collect less dust

• Hem curtains to just touch or hover about 1/4 inch above the floor. Puddled drapes collect hair and grit.
• Use glass-front cabinets instead of open shelving in drafty rooms.
• Paint high-traffic hallways in eggshell or satin. Smoother finishes wipe clean more easily than flat paint.
• Cover radiators with metal grilles or cane panels. Cast iron fins are hard to clean, and convection streaks soot up the wall above them.

For a full cleaning routine once the leaks are handled, see 20 methods to reduce dust or the shorter 9-step plan.

Is old house dust dangerous?

Usually it is an irritant for allergies. But homes built before 1978 may have lead paint, and asbestos can be in flooring, insulation or pipe wrap. Test before you sand or demolish anything, and use a licensed professional if the results are positive.

Don't seal everything tight, either. An old house that's closed up without mechanical ventilation can trap moisture and grow mold, so ask a pro about balanced ventilation when you tighten the envelope.

Save

Frequently asked questions