How to Paint a Brick Fireplace

To make sure your paint adheres and dries properly, you'll need to thoroughly clean the brick. Use a wire scrub brush to remove any dirt or dust, then apply nonsudsy trisodium phosphate (also called TSP; wear gloves and safety goggles), and wash thoroughly with a heavy-duty cleaner. Rinse and let dry. Cover your floor with a drop cloth and tape off any areas you want to remain paint-free.

A stain-blocking, oil-base primer protects your paint against future soot stains from fireplace use. Apply primer to the entire surface, following the manufacturer's directions.

Once the primer is dry, it's time to paint. Choose indoor, latex, heat resistant paint—either flat, semigloss, or gloss—rated to withstand temperatures generated by the fireplace (generally about 200°F) and a roller designed for textured surfaces. The latter helps cover the surface of the brick, which is likely not smooth. For any spots you can't reach using a roller, touch up with a small paintbrush. Apply a second and third coat as needed, allowing plenty of drying time between coats.