Quick answers
- Most walls and ceilings: water-based (acrylic latex) paint.
- Trim, doors and cabinets: a hard, washable enamel in satin, semi-gloss or gloss.
- Kitchens and baths: a washable sheen and a mildew-resistant formula, plus good ventilation.
- Older plaster or historic brick: the right primer, or a breathable paint, matters more than the color.
Water-based vs. oil-based paint
Interior paints are either latex (water-based, often acrylic) or oil/alkyd.
| Feature | Water-based (latex/acrylic) | Oil-based (alkyd) |
|---|---|---|
| Best for | Walls, ceilings, most rooms | High-wear trim, doors, cabinets |
| Dry and cure | Dries in about 1-2 hours; full cure takes 2-3 weeks | Dries in about 6-8 hours; cures in about 5-15 days |
| Cleanup | Soap and water | Mineral spirits |
| VOCs | Generally lower | Generally higher |
Waterborne alkyds are a middle option: the smooth, hard finish of oil with soap-and-water cleanup. The National Park Service notes that on exterior wood, latex over old chalky oil paint can peel, so prep and primer matter.
Primer: when it matters
Primer helps paint stick, seals the surface, and keeps stains from bleeding through. Common types:
- Drywall (PVA) primer: for new, bare drywall. It evens out the surface so the paint looks uniform.
- Stain-blocking primer: for water marks, smoke, tannin from wood, and odors. Severe stains may need a shellac or oil-based blocker.
- Bonding primer: for slick, glossy surfaces like old enamel, laminate or tile.
- Plaster and masonry primer: for plaster, brick and concrete (see the older-homes section).
Sheens: where each one fits
| Sheen | Where it works | Trade-off |
|---|---|---|
| Flat / matte | Ceilings, adult bedrooms, formal rooms, uneven walls | Hides flaws; harder to scrub |
| Eggshell / satin | Hallways, family rooms, kids' rooms, foyers | Washable, slight shine |
| Semi-gloss | Kitchens, baths, trim, closet doors | Very durable; shows flaws |
| Gloss | Doors, cabinets, wood trim | Hardest and shiniest |
Ceiling paint
Ceiling paint is usually flat and formulated to reduce spatter, which helps hide small flaws. Water stains need a stain-blocking primer first, or they can show through the new coat.
Kitchens and baths: mildew-resistant paint
Mildew grows in damp spots with little sun or airflow. Look for a paint made for high humidity, and go with a washable sheen.
- Wash and dry the wall before painting. Never paint over mildew; it can grow through the new coat.
- Run the exhaust fan or a dehumidifier. Paint helps, but it can't replace airflow.
- If it looks like more than surface mildew, see our guide on mold behind drywall.
Exterior paint
Outdoor paint has a tough job: keep water out of the wood. The NPS says exterior paint is a temporary shield, usually repainted every 5 to 8 years. Acrylic latex is common outside for its adhesion and flexibility. Before repainting, fix leaks and moisture, since a lot of "paint failure" is really moisture or poor prep. If paint is sound, it often doesn't need stripping. Check the label for the temperature range.
Brick, masonry and breathable paint
Old brick and plaster move moisture in and out as vapor. A coating that blocks it can trap water inside the wall. The NPS explains that waterproof coatings seal out vapor as well as liquid water, and says they, including elastomeric paints, should almost never go on above-grade historic masonry. Never coat a damp wall. Trapped moisture can damage the brick and push dampness higher in the wall, and paint over it can blister and peel.
- Mineral/silicate and lime-based paints are described by manufacturers as breathable. They soak in rather than form a film.
- Fix leaks, gutters and failing mortar first. The NPS says repointing mortar should be as soft and vapor-permeable as the original, or softer.
Low-VOC and zero-VOC
VOCs are fumes some paints give off while drying. "Low-VOC" and "zero-VOC" options are common in water-based paint. The EPA cautions that those labels don't cover every chemical that matters indoors. So ventilate while you paint and while it dries, and follow the label's precautions.
Chalkboard paint (and how it differs from chalk paint)
Chalkboard paint makes a smooth, matte, writable surface for chalk. It rolls on like regular paint, so a whole wall can become a chalkboard. We offer chalkboard walls, and they suit kids' rooms, playrooms and kitchens, where a family message or grocery wall is handy.
Manufacturer guides agree on the basics:
- Start with a clean, dry, dull surface; fill and spot-prime flaws.
- Apply even coats. Don't paint when it's below 50°F.
- Let it cure, at least 3 days on the data sheets we reviewed, before using it.
- Condition it: rub the side of a piece of chalk over the whole surface, then erase. Plain, lighter-colored chalk works best.
- Low-VOC chalkboard paints exist; one data sheet we reviewed lists under 50 g/L.
Chalk paint is different. It's a decorative, ultra-matte furniture paint, usually sealed with wax or a topcoat. One manufacturer says plainly it is not chalkboard paint and isn't meant to be written on. Milk paint is a traditional powder paint (casein, lime and pigment) with a flat, chalky look, mostly used on raw wood furniture.
Cabinet and trim enamels
Cabinets and trim take daily wear, so they usually get a hard-curing enamel (alkyd or waterborne alkyd). The surface should be clean, dry and dulled, and cabinets need time to cure before heavy use.
Patch and paint: tips for a clean repair
- Fill small holes with spackle and larger ones with joint compound, in thin coats, sanded smooth.
- Spot-prime the patch. Patched spots absorb paint differently, and without primer the patch can show through as a dull spot. That is called flashing.
- Use the same paint, applied the same way (brush or roller), and slightly reduced per the can. Feather the edges, and prime and paint to a natural break, like a corner.
- If the repair still shows, painting the whole wall may look best.
Older homes: plaster, drywall and lead paint
Plaster vs. drywall. Plaster is hard and thick; drywall is lighter and flatter. They don't take paint the same way, so the primer matters. New plaster can be highly alkaline and may need an alkali-resistant primer. One major paint maker advises letting new plaster cure about 30 days before priming, or at least 7 days with a masonry primer. Old plaster that's powdery needs hardening before paint, and cracks should be repaired first. Not sure which you have? See our drywall and plaster repair page.
Lead paint (built before 1978). Assume older paint could contain lead. Dust from sanding or scraping is the real hazard, and children are most at risk. We flag older painted surfaces and recommend proper lead testing before anything disturbs the paint. We don't do lead abatement. The EPA says not to try removing lead-based paint yourself, and to keep painted surfaces in good shape.
What to ask your painter
- What are my walls made of, plaster or drywall, and how will you prep them?
- Which primer will you use, and why?
- Which paint and sheen for each room? Is it mildew-resistant for baths?
- Is my home older than 1978, and what's the plan for lead?
- How will you handle brick, plaster or historic surfaces so moisture isn't trapped?
- Is the quote in writing, with the price agreed before work starts?
Ready to paint?
Tell us what you have and send a photo or two. We'll help you pick the right approach. Get a quote or call (202) 438-6197.
Sources
- Sherwin-Williams: Paint Sheen Guide
- Sherwin-Williams: How to Choose Interior Paint
- Sherwin-Williams: How to Make Paint Dry Faster
- Sherwin-Williams: How to Choose Primer
- Sherwin-Williams: Peeling Plaster
- Sherwin-Williams: Paint Flashing
- Sherwin-Williams: How to Paint a Ceiling
- Sherwin-Williams: How to Make a Chalkboard Wall
- Benjamin Moore: Alkyd Paint
- Benjamin Moore: Prevent and Remove Mildew
- Benjamin Moore: Chalkboard paint technical data sheet
- Behr: Chalk Decorative Paint FAQ
- Keim Mineral Paints: breathable masonry paint
- This Old House: How to Apply Chalkboard Paint
- This Old House: All About Milk Paint
- NPS Preservation Brief 10: Exterior Paint Problems on Historic Woodwork
- NPS Preservation Brief 1: Assessing Cleaning and Water-Repellent Treatments for Historic Masonry
- NPS Preservation Brief 2: Repointing Mortar Joints in Historic Masonry Buildings
- EPA: Technical Overview of Volatile Organic Compounds
- EPA: Volatile Organic Compounds' Impact on Indoor Air Quality
- EPA: Protect Your Family from Lead in Your Home