How to Create Faux Slate Tile

Choose a color scheme. Natural slate tile is generally gray or brown. Choose a slightly lighter shade of gray or brown for the base coat and a darker tone of the same color for the top coat. For a more realistic look, use three or more shades. Use concrete paint for a concrete floor or thick latex enamel for walls and ceilings.

Prepare the surface. Patch nail holes and repair surface imperfections. Remove loose or peeling paint with a paint scraper and use a block sander or palm sander to smooth the remaining surface.

Use a paint roller to apply a thick, even coat of primer to the surface you will paint. Allow the primer to dry overnight.

Use a paint roller to apply two coats of the light gray or brown base color, allowing the first coat to dry for several hours before applying the second coat. Cut in with a paintbrush around openings and edges. Allow the second coat to dry overnight.

Use a painter’s chalk line to create a grid along the surface, dividing the space into individual “tiles.” Larger tiles take less time to paint, while smaller tiles provide a more intricate look. Tape along the chalk lines with 1/4-inch painter's tape. The top coat will not penetrate the tape. This allows the base color to show through, creating “grout lines.” True slate tiles are not perfectly rectangular, so use the chalk lines as a guide rather than attempting to create perfectly straight finished lines.

Mix the darker top color with glaze according to the manufacturer’s instructions. If you will use additional shades, work from lightest to darkest. Glaze sets quickly, so mix only enough to last until your first break.

Dip a rag into the paint and glaze mixture, and gently press into each tile square. Swirls, loops and patterns create a natural slate look. Keep a paintbrush at hand to catch any drips or smears. Change rags frequently as they become sticky with paint. Allow the surface to dry for at least two days.

Repeat Steps 6 and 7 with a slightly darker shade of your chosen color if desired. Additional shades add to the realism but are not necessary for a basic slate tile look.

Use a paint roller to gently apply a thin layer of clear coat. This protects the finish from dirt and debris and provides some protection against scratches and damage. Allow the clear coat to dry overnight before replacing furniture in the room.