There are many approaches to making a mosaic bird bath, and one of the easiest involves gluing small glass tiles to a sealed terra cotta saucer. The required supplies are a 12-inch terra cotta saucer, terra cotta sealer, tile adhesive, a foam brush, sanded grout, outdoor grout sealer, paper towels, water, a putty knife, rubber gloves, a sponge, clean rags, a paper cone mask and safety goggles. This project takes about two days.
- Seal the saucer
Rinse a 12-inch terra cotta saucer and let it dry overnight. Apply terra cotta sealer with a foam paintbrush and give it two hours to dry. Rinse the brush.
- Glue the tiles to the saucer
Daub adhesive on the back of a glass tile and place it on the saucer. Repeat until the saucer is covered with tiles. Maintain 1/4 inch of space between adjacent tiles.
- Mix the grout
Put on safety glasses and a paper cone mask. Add water to the powdered grout until it forms a thick paste, then let it sit for 10 minutes. Remove the mask and safety glasses.
- Spread the grout
Don rubber gloves and spread the grout over and between the tiles. Wait 20 minutes, then wipe the drying grout with a clean, dry rag. Wait another 30 minutes, then wipe the tiles with a wet sponge. Wipe them at 20-minute intervals for up to two hours.
- Buff the grout
Buff the tiles with a clean, soft rag. Let the bird bath dry for 24 hours.
- Apply outdoor sealant
Use the foam paintbrush to cover the entire birdbath with a penetrating outdoor sealant. Wait 10 minutes, then gently wipe the birdbath with a dry paper towel. Wait two more hours, then apply a second coat of sealant.
- Install the birdbath
Place your mosaic birdbath on a pedestal, column or large inverted terra cotta flower pot. Apply additional sealer once a year.