How to Make a Mosaic Mirror (Broken Mirror Wall Art)

Start with a flat base. A small artist's canvas works well and gives you clean edges, but a piece of MDF, thin plywood, or even stiff cardboard does the job too. Set it on the table with your craft glue within reach.

Break any large mirror pieces down into smaller shards first. Do this inside a bag or towel so nothing flies, and keep gloves and safety glasses on. Cut mirror edges are genuinely sharp, so handle every piece with respect.

Take one mirror shard and run a bead of craft glue across the back of the piece, not the canvas. Coating each shard as you go keeps the glue exactly where you want it and stops the surface of the canvas turning into a slippery mess under the next few pieces.

A strong craft glue holds fine for indoor wall art. If you want a more permanent bond, tile adhesive or mastic does the same thing and grips heavier pieces.

Press each glued shard onto the canvas and hold it down for a second so it grabs. There's no set pattern to follow, so drop pieces wherever they look right to you. Mix up the sizes and angles as you go.

Leave a small, even gap between each piece. Those gaps are what the grout fills, and consistent spacing is what makes the finished mosaic read as deliberate rather than random.

Keep gluing shards until the entire canvas is filled. Work outward from the middle and slot smaller pieces into the gaps around the bigger ones so you don't leave awkward bald patches.

Once the last piece is down, walk away for about 20 minutes. You want the glue fully set and every shard locked in place. If anything still wiggles, give it longer. Grouting over loose pieces will only shift them around.

Put a little water in a small bowl, then add grout powder a bit at a time, stirring with a spatula as you go. Adding powder to water, rather than the other way around, keeps it from clumping. You're after a thick, smooth paste, roughly the consistency of frosting.

Let the mix sit for about five minutes so it firms up and any dry pockets absorb. If it's runny after resting, stir in a touch more powder.

Scoop the grout onto the mosaic and spread it across the mirror pieces with your spatula. Work it in every direction so it packs down into the gaps between the shards. Don't be shy here. The whole surface should end up coated, mirror faces and all.

The goal is a solid fill with no air pockets in the seams. Those grout lines are what hold the piece together, so press firmly and cover every corner.

Once the whole surface is grouted, scrape the excess off with the edge of the spatula. Work back over the piece to fill any thin spots or gaps you missed the first time around.

Now take a damp sponge and wipe the mirror faces and the canvas edges. The shards start to reappear from under the grout as you go. Rinse the sponge often and keep wiping until the mirror shows through clean and only the seams stay filled.

Leave the piece to cure for a couple of hours, or overnight to be safe. Once it's dry, buff the mirror shards with a clean, dry cloth to clear off the last of the grout haze so they shine again.

Brush on a grout sealer if you like, especially for a spot that gets damp. Then hang your finished mosaic mirror on the wall. Every shard catches the light at a different angle, and the grout lines pull the whole thing together.