How do I clean and touch up baseboards?

The short version

Dust, wash with warm water, wipe dry, then fix and paint only what cleaning does not remove. Baseboards collect dust on the top edge and scuffs at the front, so they need cleaning more often than touching up, and most marks come off without paint.

Clean first

Start dry. Vacuum along the floor edge and brush or wipe the top of the board so the damp cloth does not smear dust into streaks. Then wash from one end to the other.

Benjamin Moore's advice on cleaning painted walls works for trim too: most walls can be washed using a sponge and warm water.^[1] For surfaces that have exposure to oil or grime, like kitchen walls, wash with a solution of water and grease-cutting detergent and follow up with clean water to remove any residual cleaning agent.^[1] Finish by wiping the walls with a damp cloth.^[1] On baseboards, that final pass matters most along the bottom, where water can sit against the floor.

Rub gently. Hard scrubbing wears the sheen off trim and leaves a dull patch that looks worse than the scuff did.

If you find mildew, deal with it before painting. Never paint over mildew—it will grow through new paint.^[1]

Try cleaning a scuff before painting it

Shoe marks and furniture scuffs are the usual culprits. For a mark on a painted surface, your first step should be trying to clean it with a rag, soap and water.^[2] Many scuffs are surface marks and disappear. Paint only when the finish itself is chipped, dented or worn through.

Fix small damage

Fill nail holes and dents with spackle for painted trim,^[4] let it dry and sand it flush. A thin crack where the board meets the wall is better closed with paintable caulk, and ENERGY STAR's trim-sealing guidance uses caulk for gaps a quarter inch or less.^[4] For a gap at the floor, see why there is a gap between the baseboard and the floor.

Touch up paint

Touch-ups look best when colour and sheen both match. You should make sure you consider the sheen of your painted wall when selecting your touch-up paint,^[2] and the same goes for trim, which is often semi-gloss. Take a chip of the trim to a paint store if you no longer have the can. Be aware that the flatter the finish, the easier to touch up; the glossier the finish, the more challenging.^[2] That is why a touched-up gloss baseboard can show a halo, and why repainting the whole board is sometimes the neater fix.

Use a small brush and start with as little paint as possible, applying a very small amount at a time.^[2] Press the brush into the damaged spot and feather outward. If a second coat is needed, be sure to let each coat dry completely before starting a new one.^[2] Do not rush it: a second coat over wet paint drags and shows.

Old paint and lead

If your home was built before 1978, it may have lead-based paint.^[3] Wet-cleaning is fine, but dry sanding and scraping are not. As you scrape, drill, cut or remove trim, you create dust that may contain lead.^[3] EPA's do-it-yourself guidance says to mist areas before sanding, scraping, drilling, and cutting to keep the dust down.^[3] Keep the room closed off and wipe up with damp cloths rather than sweeping.

Stop and call a pro if

• The paint is peeling or flaking in a pre-1978 house. Old flaking paint may contain lead. Do not sand or scrape it dry; ask a lead-safe certified contractor.
• The wood is soft, swollen or stained. Baseboard that crumbles under a fingernail or stays damp may point to a leak or moisture in the wall.
• Mildew keeps coming back. Wiping it away without finding the moisture source will not hold.
• You see gaps that keep widening or nails popping. That is a fitting or framing problem, not a cosmetic one.

Getting help in Virginia

If the trim needs more than a clean and a brush of paint, see how to install baseboard trim or whether to hire a carpenter to install trim. Browse more home repair answers or the home repair services on Loclis.

When you are ready, describe the trim job once and licensed local pros quote it.