How to Limewash Walls: Step-by-Step Guide
To limewash a wall, prepare a clean, porous mineral surface, prime only where that surface needs it, then apply two thin coats of diluted limewash 2–4 hours apart: by roller or sprayer for an even finish, or with a large brush for the Cloud Effect. Exposed exterior walls take a third coat. The wall is dry in 24 hours and fully cured in 30 days.
How to limewash walls in 6 steps
- Prepare the surface. Dry, clean and free of dust, salts and loose paint. Latex paint has to come off.
- Prime where needed. Primer White L44 on drywall, gypsum, brick and patches, then wait 24 hours. For the Cloud Effect, add a base coat of Primer Plus and wait 2–4 hours.
- Mix, dilute and test. Stir, add 10% water by weight for an even first coat or 0–5% for the Cloud Effect, and paint a 10 sq ft test patch.
- Apply the first coat. Thin and regular by roller or sprayer, or in soft, rounded strokes with a large brush, working wet to wet from corner to corner.
- Recoat after 2–4 hours. Second coat with 5% water; a third on exposed exterior walls.
- Let it cure. Dry in 24 hours. No washing or scrubbing for 30 days, and no rain on exterior walls for 4 days.
What you need to limewash a wall
You need a large brush or a roller, a big bucket and paddle, masking materials, gloves and eye protection, and enough limewash for two coats.
- Cloud Effect: a large wall brush, such as a block brush. Natural bristle is the traditional choice for lime.
- Even finish: a medium-nap roller, or a sprayer with a tip of 0.017 in or larger.
- Masking tape, drop cloths and a damp cloth: wipe splashes off right away with water.
- Gloves and eye protection. Read the label and SDS before you start.
How much limewash you need
OxiGen™ Limewash covers 365–445 sq ft per gallon per coat, or about 180–220 sq ft per gallon for a two-coat finish. Multiply the area by the number of coats and divide by the coverage.
| Project | Area | Limewash, 2 coats |
|---|---|---|
| Accent wall | 100 sq ft | About 0.5 gal (buy 1 gal) |
| Ceiling, 12 × 12 ft room | 144 sq ft | About 0.7–0.8 gal (buy 1 gal) |
| Walls, 12 × 12 ft room, 8 ft high | About 350 sq ft net | About 1.6–1.9 gal (buy 2 gal) |
| Walls, large living room | 500 sq ft | About 2.3–2.7 gal |
Primer White L44 covers 1,020–1,220 sq ft per gallon, diluted 1:1; Primer Plus covers 200–240 sq ft per gallon. Check coverage on your test patch.
How to prepare the surface for limewash
Limewash needs a dry, clean, porous mineral surface, because lime soaks in and bonds with the wall instead of sitting on it as a film. Remove dust, salts and anything loose, let new mineral surfaces cure for at least 28 days, and fix leaks, rising damp and structural cracks first.
| Surface | Preparation | Primer |
|---|---|---|
| Drywall and gypsum plaster | Sand joint compound; dust off | Primer White L44 |
| Lime or cement plaster | Dry, sound, cured 28 days | None |
| Brick | Clean, dust off, let dry | Primer White L44 |
| Cement stucco, concrete, CMU | Dry, sound, cured 28 days | None |
| Patches and repairs | Sand; dust off | Primer White L44 |
| Matte mineral paint | Clean and sound | None |
| Salts or efflorescence | Dry-brush the crusts off | Neutralysalt Primer |
| Crumbling or very absorbent | Brush off loose material | MinerGen |
| Latex or film-forming paint | Strip, scrape or pressure-wash it off | As for the surface underneath |
Primer White L44 evens out absorption, which would otherwise show as uneven color. Dilute it 1:1 with water and wait 24 hours. Limewash does not go directly over latex or any film-forming paint: lime can't bond to a plastic film, so it dusts off. For salts, see white salt stains; for exteriors, limewash on brick, stucco and exterior walls.
For the Cloud Effect, add one layer: once the surface is prepared and primed where needed, apply a base coat of Primer Plus with 5–10% water by weight (about 10–19 fl oz per gallon) and wait 2–4 hours. The Cloud Effect always goes over Primer Plus.
How to mix and dilute limewash
Stir OxiGen™ Limewash thoroughly and dilute it with water by weight: 10% for the first coat of an even finish, 5% for the coats after it, and 0–5% for the Cloud Effect.
| Coat | Even finish | Cloud Effect |
|---|---|---|
| Base coat | Not needed | Primer Plus, 5–10% water |
| 1st coat | 10% water (≈ 19 fl oz/gal) | 0–5% (up to ≈ 9 fl oz/gal) |
| 2nd and 3rd coats | 5% water (≈ 9 fl oz/gal) | 0–5% |
- Box the cans. Pour all the cans for one wall into one large bucket so the tone stays consistent, and stir often: lime settles.
- Add nothing else, including paint tints.
- Test first. Paint 10 sq ft of the wall with the same primer, tool and technique, and judge it dry: lime lightens as it dries. Our limewash colors guide explains how to read a sample.
How to apply limewash
Apply limewash in thin coats, working full sections from corner to corner while the edge is still wet, and recoat after 2–4 hours. The technique depends on the finish you want.
Even finish with a roller or sprayer
Roll or spray thin, regular coats, one full wall at a time, and never go back over areas that have started to dry. Cut in edges as you reach them rather than all at the start: a band that dries before the main coat meets it leaves a lap mark. Finish each wall in one session and stop only at corners.
Cloud Effect with a large brush
The Cloud Effect is the soft, light-and-dark movement most people picture as limewash. Over the Primer Plus base, work the brush in soft, rounded strokes. Many applicators call them X-strokes; keep them loose and curved, with no straight lines. Offload the brush unevenly instead of spreading the load evenly: that builds the lighter and darker tones. Cut in edges and corners with the same brush and strokes, and don't brush back into wet areas. Repeat the technique on the second coat.
Limewash texture
Limewash adds tone, not relief. Its texture comes from the brushwork and the surface underneath: rough stucco and brick read deeper than smooth plaster. For texture you can feel, choose a trowel-applied lime plaster such as TerraGen™ Marmolino.
How many coats of limewash?
Two thin coats, or three on exposed exterior walls. Recoat after 2–4 hours at 77 °F and 60% relative humidity; cold or humid weather stretches that time. Too much product in one coat can cause micro-cracking: lime gains hiding power and hardness as it carbonates, not from heavier coats.
How to limewash a ceiling
You limewash a ceiling with the same system as a wall: prepare, prime, then two thin coats. Most ceilings are drywall or plaster, so follow the surface table above.
- Do the ceiling first, then the walls, so splashes land on unfinished surfaces.
- An even finish is easiest overhead, with a medium-nap roller on an extension pole or a sprayer. The Cloud Effect works too, over Primer Plus, but it is slower going.
- Work in full strips from wall to wall, wet to wet, without stopping mid-ceiling, and keep coats thin.
- Painted ceilings: latex has to come off first, which is real work overhead. Ask us before you commit.
- Bathrooms: protect the finish with TerraGen™ PU Water-Repellent, which also reduces its breathability. More in limewash in a bathroom.
Drying, curing and what to expect
Limewash is ready to recoat in 2–4 hours, fully dry in 24 hours and fully cured in 30 days, as the lime absorbs CO₂ from the air and hardens into calcium carbonate.
- It dries lighter. Wet limewash looks darker and patchier than the final wall, and the first coat looks translucent. Judge color and coverage only when dry.
- It keeps hardening, gaining hiding power as it carbonates.
- Protect it while it cures from sun, wind and rain; outside, keep it dry for 4 days.
- Don't wash or scrub it for 30 days. Then dust it with a soft, dry brush; no chemicals, abrasives or solvents.
- Expect slight variation from the sample and between batches.
Common limewash mistakes
- Direct sun or wind. Stay out of both and off hot surfaces, while applying and while it dries. Outside, follow the shade.
- Wrong temperature. Air and surface must be between 41 °F and 104 °F.
- Over-diluting. Stay at 10% and 5%, or 0–5% for the Cloud Effect, measured by weight. Extra water is not a shortcut to a softer look.
- Heavy coats. They micro-crack. Offload the brush or roller well.
- Touching up dry areas. A spot touch-up will show. Redo the whole section, corner to corner, with the same batch.
- Brushing back into wet areas. It flattens the Cloud Effect.
If a finished wall rubs off or looks patchy, see why limewash rubs off or looks patchy.
Limewash application FAQ
Can you limewash textured walls?
Yes, if the texture is bare plaster or stucco, or primed drywall. Most textured drywall is already painted, and latex has to come off first. Rough textures use more product, so plan on the low end of the coverage.
Should I use a brush or a roller for limewash?
A large brush for the Cloud Effect, over Primer Plus. A medium-nap roller or a sprayer for an even finish. Either way, thin coats, wet to wet.
Can you spray limewash?
Yes, for an even finish, with a tip of 0.017 in or larger and thin, regular coats. Mask well. The Cloud Effect is done by brush.
How long should limewash dry between coats?
2–4 hours at 77 °F and 60% relative humidity, longer in cold or humid weather. It is fully dry in 24 hours and cured in 30 days.
Why does my first coat of limewash look patchy?
The first coat is translucent, and wet lime looks darker than dry lime. That is normal. Apply the second coat after 2–4 hours and judge the wall dry.
How much limewash do I need for a room?
About 1.6–1.9 gallons for two coats on the walls of a 12 × 12 ft room with an 8 ft ceiling (about 350 sq ft). Coverage is 365–445 sq ft per gallon per coat.
Do I need a primer for limewash?
Not always. Cured plaster, stucco, concrete and matte mineral paint need none. Drywall, gypsum, brick and patches take Primer White L44, and the Cloud Effect goes over Primer Plus.
Start your limewash project
OxiGen™ Limewash White and OxiGen™ Limewash Color, in 34 Harmony shades, are Zero VOC and made for interior and exterior walls, in 1 gal and 5 gal. Inquire for a Sample Kit, browse all limewash paints or choose a shade in our limewash colors guide. Working outside? Read limewash on brick, stucco and exterior walls. New to lime? Start with what is limewash. The full method is in the application guide and the Technical Data Sheet. For a specific wall, send photos to support@origenpaints.com.