Painting a Brick Fireplace in Portland: Prep, Paint, or Limewash

You can paint a brick fireplace, but treat the decision as permanent: the Brick Industry Association warns that paint can be very difficult to remove from brick without damaging it. Done right, the job is cleaning off soot, fixing any moisture that shows as white salt deposits, an alkali-resistant masonry primer, and acrylic latex topcoats. Leave a working firebox bare unless a product is labeled for it.

That sequence comes from the association's Technical Note 6 on changing the appearance of brick (March 2025), with product details from the makers' data sheets. In a pre-1978 house where the fireplace, mantel or trim was painted before, add lead-safe work, covered below.

Should you paint a brick fireplace?

Paint makes sense when you want one even, opaque color and accept the trade-offs. The Brick Industry Association (BIA) lists them plainly:

• It is hard to undo. Taking paint off brick generally needs a chemical remover formulated for masonry, and BIA advises against sandblasting because it damages the brick.
• It changes the texture. Paint smooths over the variation between brick and mortar, and because the color is uniform it can draw attention to any unevenness in the face.
• It slows drying. Acrylic latex forms a film that BIA describes as vapor semi-permeable, and each extra coat lowers the brick's ability to breathe a little more.
• It needs upkeep. Painted brick has to be repainted from time to time, a chore bare brick never needs.

Indoors the stakes are lower. BIA notes that interior brick is usually not exposed to moisture or freezing, so a wider range of finishes is acceptable inside than out. Its one caution is brick that forms the inside face of a solid masonry wall, which may depend on drying toward both sides; there it recommends treating the interior face like exterior brick and keeping the finish breathable.

If the color is what bothers you, BIA describes options that keep more of the brick's character: masonry stains, which soak in, leave the texture unchanged and need no maintenance; limewash; and mineral paint. Whatever you choose, try a sample board or hidden test patch first, and judge it dry, because finishes on brick can look different wet.

Paint, limewash, whitewash or mineral paint?

Five of the finishes BIA covers for changing how brick looks, with what it and the product makers say about each:

Limewash, mineral paint and stain all soak into bare, absorbent brick, and BIA says none will bond to glazed brick. Over old paint the makers' rules differ: Romabio calls for its MicroGrip primer before its limewash or masonry paint goes over an old coating; BIA says an existing coating must come off before mineral paint; and KEIM, a silicate-paint maker, says its paints suit sound, previously painted surfaces but coatings in poor condition should be stripped. Check the data sheet for the exact product.

How to clean soot off fireplace brick before painting

BIA notes that fireplace surrounds often need extra cleaning before painting to remove soot. Its sequence:

1. Dry-brush the brick with a stiff, non-metallic brush, then vacuum. Skip wire brushes; BIA's cleaning note says they can damage the brick surface.
2. Pre-wet the brick, then wash it with a sponge or rag and a grease-cutting detergent in water, stepping up to trisodium phosphate (TSP) if needed.
3. Rinse carefully and let it dry.
4. For smoke stains that remain, BIA suggests scrubbing with a scouring powder, particularly one containing bleach, and a stiff bristle brush. Past that, ask a maker of specialty masonry cleaners.

Do not reach for muriatic (hydrochloric) acid in any strength: BIA says unbuffered acids can cause damage and staining that cannot be repaired. Some primers also want leftover discoloration sealed. Sherwin-Williams's data sheet for its Loxon masonry primer, for example, says smoke stains should be sealed with an appropriate primer-sealer.

White powder on the brick? Fix the water first

A white, crystalline crust on brick is usually efflorescence: water-soluble salts left behind when water moving through the masonry evaporates. BIA's Technical Note 23A says it needs salts, water and a path through the brick at once, and that efflorescence appearing more than a year after construction generally points to excess water or poor drainage, often worst in winter. White salt on a fireplace wall after a wet Portland winter means finding where the water gets in before anyone paints.

BIA's order of work: repair the source of moisture and let the brick dry, remove the deposit by dry-brushing or with a stiff fiber brush and water, then watch for it to come back before applying anything. Efflorescence can undermine any coating put over it, and BIA does not recommend a coating as the only fix.

The same goes for damaged masonry. BIA recommends repointing mortar with cracks wider than the thickness of a business card, replacing loose or badly cracked bricks, and letting new or repaired mortar cure at least 30 days before any finish goes on, longer in cool weather.

Then the brick has to be dry. BIA says to wait at least 24 hours after cleaning, longer in rainy or humid weather, and offers a simple check: tape a sheet of 4-mil plastic tightly over the brick and mortar and leave it for at least 16 hours. Moisture on the underside means it needs more time. Check the primer's own limits as well; Loxon's data sheet, for instance, calls for mortar cured at least 7 days and a moisture content of 15 percent or less.

What is the best paint for a brick fireplace?

Start with the primer. Brick itself is normally pH-neutral, but it is laid in mortar that is strongly alkaline, and BIA says that alkalinity can cut paint durability. Its recommendation is an alkali-resistant primer or a paint made specifically for masonry.

As an example of what to look for on a data sheet, Sherwin-Williams's Loxon Concrete & Masonry Primer-Sealer is an acrylic primer rated for interior and exterior masonry and for surfaces from pH 6 to 13. Its recommended system is one coat of primer and two topcoats, and its list of compatible topcoats includes interior wall paints. The same data sheet calls for a roller with a 1/2- to 1-1/2-inch nap.

For the topcoat, BIA calls acrylic latex one of the most common choices, available in a wide range of colors and sheens. Its advice is to pick products with a track record on brick and to avoid heavy coats, which make the masonry less breathable, and it notes the final look depends a great deal on how the paint is applied. Sheen is a matter of taste and cleaning; our guide to choosing a paint sheen covers the trade-offs. The mantel and any wood trim are woodwork, not masonry, and are painted like the rest of the room's trim.

Can you paint the inside of a fireplace?

Not with ordinary primer, paint or limewash. BIA's guidance is that no treatment goes on the firebox, the recessed area where the fire burns, including its floor, sides and back, if the fireplace still works and will see open flame, unless the treatment's maker specifically says it can.

• Some paints are labeled for fireboxes. Rutland labels its 1200°F and 1400°F flat black brush-on paints for use inside a masonry firebox. Its directions call for a single layer brushed onto a cold surface with the fire completely out, 24 hours of air drying, and a heat cure that is recommended but optional. Expect some smoke and odor the first time the fireplace is lit.
• Not every high-heat paint is meant for brick. Rust-Oleum's Specialty High Heat, rated to 1200°F, is made for metal such as grills, wood stoves, fire pits and fireplace screens, and its data sheet says not to use it on metal directly exposed to open flame.
• Limewash is a poor fit. Romabio says its limewash can technically go inside a fireplace but does not recommend it, because it will char and pick up soot, and its other products cannot be used there at all.

The surround and hearth, outside the firebox, are where masonry primer and paint belong. Loxon's data sheet, for one, gives temperature limits for applying the primer but no heat rating for use. If you are unsure how hot a section right beside the opening gets, ask the paint's manufacturer before painting it, and if a gas or wood insert sits in the opening, check its manual or ask the installer about finishing around it.

Limewash and whitewash on a brick fireplace

Real limewash is lime and water. BIA describes it as slaked or hydrated lime thinned with water, about 1 part lime putty to 1 or 2 parts water, brushed onto slightly dampened brick with 24 hours between coats. The more coats, the more opaque it gets. Because lime is alkaline and already a component of mortar, BIA says it is fully compatible with brick and does not change how the brick breathes.

• It needs bare brick. Romabio formulates its Classico Limewash for unsealed, unpainted, absorbent brick, and its data sheet requires a primer first on other surfaces, including old coatings and glazed brick.
• It is reversible only at first. BIA says some limewashes wash off with water within the first few days. Romabio says Classico can be wiped off right after it goes on and removed with a high-force pressure washer for up to two days. After that it cures into the brick; Romabio puts full curing at up to 20 to 25 days in ideal conditions.
• It can rub off indoors. BIA notes that interior limewashed surfaces are not usually washable, and Romabio says spots people touch or sit on, like a raised hearth, need its Mineral Shield top coat to keep the chalky residue off skin and clothes.
• It lasts, and recoats are easy. BIA puts limewash life at five to 10 years or more, depending on how much weathered character you want, and new coats go over old ones without stripping.

“Whitewash” can mean two different things. BIA notes the word was used historically for limewash. Today it more often means latex paint thinned with water, which BIA calls a faux finish with very different performance. It starts at about equal parts paint and water, can be wiped off with a damp cloth before it dries, forms a film rather than soaking in, and should not be expected to match real limewash for durability outdoors.

Lead paint on an older Portland fireplace

If your house was built before 1978 and the fireplace brick, mantel or trim has been painted before, assume one of the layers contains lead. Under the federal Renovation, Repair and Painting (RRP) rule, scraping or sanding that paint is renovation work once it disturbs more than 6 square feet of painted surface in a room. In Oregon, the Construction Contractors Board says only contractors with a Lead-Based Paint Renovation (LBPR) license can bid or work on those homes. In Vancouver and the rest of Washington, the firm needs RRP certification from the state Department of Commerce.

The rule also bans the quickest ways of stripping a painted fireplace: open-flame burning, power sanding or abrasive blasting without a shrouded tool on a HEPA vacuum, and heat guns at 1,100°F or above. BIA's cleaning note separately advises against scraping or blasting brick that may carry lead paint unless abatement-level protection is in place. Brick that has never been painted has no old paint to disturb, although the mantel and trim around it may. Our guide to painting a pre-1978 home explains what lead-safe work looks like, our lead-safe painting for pre-1978 homes page covers how it is quoted, and you can confirm a painter's LBPR license with our guide to checking a painter's license.

What does it cost to paint a brick fireplace?

We do not publish a fireplace price, because no single figure would mean much: recoating a clean, previously painted surround and restoring a sooty fireplace with efflorescence, cracked mortar or lead paint are different projects. Ask each painter to list the fireplace on its own line, with the cleaning method, repairs, primer, number of coats, any firebox work and lead-safe steps, so the quotes are comparable. For the rest of the room, our cost guide has Portland-area interior price ranges, and our interior painting page explains how interior jobs are scoped.

Planning a fireplace makeover along with other interior work? Describe your project and mention the fireplace, the year your house was built and whether the brick has been painted before, so the estimate covers the whole job.

Common questions