Expert Answers
What Surfaces Can Ceramic Tiles Adhere To, Do I Need Cement Board?
QUESTION
Ceramic Tile Suitable Substrate - I am a mosaic artist and I would like to know what surfaces tile can adhere to and when I need and don't need to use cement board. For example can tile adhere to surfaces such as glass, drywall, or particle wood without the use of a cement board?ANSWER
ANSWER - Ceramic tile can be adhered to anything with limitations.You can adhere to glass, metal, wood, drywall, fiberglass, etc. with limitations.
The substrate material has to be structurally stable and can't have any deflection more than L/360, so it has to be sturdy.
There are limitations for wet areas (showers, pools, etc.) and exterior areas. You can bond tile to particle board as long as it never gets exposed to moisture and remains dry and stable. You can't use drywall exterior.
There can be issues if the substrate coefficient of expansion differs substantially from the ceramic tile, particular for exterior areas or areas around fireplaces, barbecues, and etc, or in extreme climatic conditions. There needs to be movement joints designed into the installation.
You have to use the appropriate adhesive with each substrate. For instance, you should use 100% silicon or epoxy over metal or glass. Of course there can not be any contaminates on the substrates and they need to be suitable for adhesion.
It is always best to adhere ceramic tile to a structurally sound and properly prepared concrete substrate.
In summary, consider the application to determine which substrates are suitable, then find out which adhesive is suitable to bond the ceramic tile to the type of material, and make sure the substrate is sturdy and properly prepared for adhesion.
Good Luck!
6 thoughts on “What Surfaces Can Ceramic Tiles Adhere To, Do I Need Cement Board?”
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I want to know if I can put ceramic tiles on my roof patio over an acrylic sealant. I need to seal cracks as the roof is leaking.
Your question isn’t clear in terms of what you mean by acrylic sealant. Acrylic sealant is normally a latex based caulking which does not perform well or last long. The tile industry requires an ASTM C920 silicone or polyurethane sealant.
The question is what has caused the cracking in the membrane? Treating the crack with the sealant is treating symptom of the problem and not the problem that caused the cracking.
Tile in itself is not waterproof. You have to have a waterproof membrane applied first that has to be in good shape. If the membrane meets ANSI A118.10 then you can bond tile directly to it with an ANSI A118.4 or .15 polymer modified thinset mortar adhesive.
The question is whether your existing waterproof membrane, which typically is asphalt building paper that is weather lapped, will allow tile to bond to it. Building paper is not adequate.
You could install something like 1/4″ thick cement backer board and and then paint on an ANSI A118.10 waterproof membrane over it, and then bond your tile to it. Of course you need to install everything correctly.
Hi is it possible to successfully apply kerakoll h40 to a Gorrilla rubber based sealant ready for floor tiling?
As with any product you use for any purpose, you must go to the manufacturer of the product and read their brochures and data sheets to verify what they say how you use their product. The manufacturer directions will tell you what can be used with what products or conditions. Follow the product manufacturers directions. If you don’t see the information you are looking for then call their technical service phone number or go to their website and submit a request.
Hi, can I install cement board over vinyl flooring or does that need to be removed? What surfaces need to be prepared for cement board to be installed on?
You should be able to install backer board over a vinyl flooring as long as it is structurally sound. If the vinyl is installed over concrete, then the installation will only be as good as the bond of the vinyl to the concrete slab. You could both adhere and screw the backer board to the concrete slab, as you would installing over a wood subfloor.
If you are screwing the backer board down as most manufacturers recommend, then the adhesive is more for leveling or flattening the substrate out, and the mechanical attachment with screws is the primary fastener. It is still a good idea to make sure the surface you are bonding to is clean and scarified to some degree to achieve a good bond. Always follow the backer board and the adhesive manufacturers directions on how to use and install their products.