Q&A for How to Make a Mosaic Table Top

It’s important to wait at least 24 hours after gluing mosaic tiles before adding the grout (or follow the manufacturer’s suggestion for timing). Next, you’ll need to prepare the grout according to the instructions on the packaging, then apply by smearing it into the cracks between the mosaic tiles and scrape off excess grout with a plastic card. Allow the grout to set (usually 24 hours but follow the manufacturer’s instructions), then clean off excess grout using a cloth, warm water and dish soap. Full instructions on grout application can be found in the article above.

It is possible to mosaic on wood but there are some things to consider in terms of wood type and the intended end use. Wood can easily buckle, swell or warp when subjected to temperature changes or humidity, which can crack the grouting and cause the tiles to pop off. As such, select wood that is in good condition, sanded and sealed, or wood known to handle humidity well, and avoid using wood composites (layered and glued wood sheets). Any wood that has a mosaic on it should only be used indoors and preferably not placed in humid areas (such as the bathroom). If using wood, avoid any end use that could cause the mosaic item to get wet, such as drink coasters. Wood should never be used for outdoor mosaic.

Glue suitable for outdoor mosaics must be able to handle the temperature extremes and moisture/wet environment. For most areas, especially patios, poolsides, wet areas, use thinset bonding mortar because it is water resistant. Use this on a concrete backer board. After gluing on the tiles, the mosaic needs to be sealed to finish it and prevent water damage. You can also use solvent-based adhesives if you really want to use an adhesive, as this type will be stronger in the elements than water-soluble adhesives.

If the tabletop is polished, then it will not need to be sealed. If the tabletop is rough/unfinished marble, a sealant will prevent it from being too porous (which may soak up some of the adhesive and grout), so it might be a good idea to seal it first. Be absolutely sure you want to mosaic over marble though; marble is a beautiful surface in its own right, and if it's stained or discolored, perhaps consider trying to clean and polish it first before hiding it.

Sealing is required for some materials and definitely for outdoor uses or uses likely to be subjected to moisture. Crackle glass mosaic and any porous tile such as natural stone needs to be sealed but solid glass, ceramic and porcelain are okay without sealant. Most composite materials (mixes of glass, stone, ceramic, etc.) should be sealed. If the mosaic is likely to be subjected to stains or erosive elements, sealing can provide additional protection, making it easier to clean.

Sealing is required for some glass materials and definitely for outdoor uses or uses likely to be subjected to moisture. Crackle glass mosaic needs to be sealed but solid glass is usually okay without sealant. Mixes of glass should be sealed. If the mosaic is likely to be subjected to stains or erosive elements, sealing can provide additional protection, making it easier to clean.

You can apply the tiles directly to the wood.

You can do it as long as the table is capable of handling the load of the tile and the grout. Do a stress test on the table by placing heavy things on it. If it starts to bend, you should avoid adding mosaic tiles to it.

Fill in the edges with grout and then level them out with your trowel.

If it is metal, find a special glue designed for metals. If it is uneven, sandpaper the surface if it is wood.

You'll likely want to use a thicker piece of plywood rather than particle board if you are constructing the table yourself. Go with a 3/4'' or more in thickness.

Yes you can mosaic a wooden table. The best adhesive to use is gorilla epoxy or another strong and translucent glue.

You may be able to depending on the load and the type of materials that you are using. Make sure that your table can handle a heavy load before creating your mosaic.

Yes. Follow the same instructions, except you may not have to sand and seal your dresser if it's already done.

Allow the grout to dry for 24 hours before getting it wet. This includes the moisture that might arise from taking a hot shower.

It depends on what materials your tile is made of and whether it has already been glazed in a kiln or not. It's possible that trying to seal or laminate your tile can ruin its quality. The only case where you'd want to apply a topical sealer is if the tile is made of unglazed ceramic tile. In this case use sealers like Sta-Clene, Bullet Proof or Impregnator Pro.

Yes.

You can fill in smaller holes with grout, then sand down the surface of your table to make it even.

You can use glass tiles on a table top. Just make sure that they are thicker or have some sort of hard backing.

Absolutely. You can add color to the grout or paint it afterwards. Its not very easy, but I prefer to paint afterwards because the colors are more vibrant.