In addition to producing an uneven surface, applying too much thinset can create costly cleanup headaches and add unnecessary time to a project. Simple installation rules eliminate the possibility of this potential problem.
Applying grout follows the same methods as applying thinset to the substrate. You can use thinset to install tile over an uneven cement floor and leave the floor perfectly level. You can also use thinset mortar to level out an uneven cement floor or fill small holes in the floor without installing tile.
This depends upon the adhesive you are using.. Most cement based adhesives will state no more than a 6mm final bed.. this is what is achieved after you have bedded youre tile in place and some thicker bedding to 10mm or so in located area’s..
Also know, how thick is Thinset for 12×24 tile? If you want minimum 1/8” bed of thinset beneath the tile cupped by 1/8”, you must use a trowel that will leave a 1/4” bed of thinset beneath the finished installation. A 1/2” square-notched trowel will accomplish the proper coverage in that instance.
You can put new thinset on top of old, but only if the old thinset is perfectly smooth and level. This is rarely the case once the old tiles have been removed. Use a floor grinder and pass it back and forth over the old thinset until it is perfectly smooth and level.
Thin set does shrink but when applied the normal thickness it’s very little. Thin set can also droop with the weight of the tiles. It’s very important the you use a thin set rated for large/heavy tiles if it applies.
Use Thinset With a Higher Latex Content Higher latex content is essential for bonding to plywood. A quality unmodified thinset should be used and mixed with a latex additive.
The terms thinset cement, thinset mortar, dryset mortar, and drybond mortar are synonymous. This type of cement is designed to adhere well in a thin layer – typically not greater than 3/16th thick. For example, a 3/8″ notch trowel will produce a 3/16th inch thick coating after the tiles are pressed in to the cement.
Whether you have cracks, chips or just a stained concrete slab, Thinset helps cover the old surface and create a new problem-free area. The thin mix is laid over the old concrete, slipping into cracks and crevices, hardening quickly into a smooth surface.
What happens when the adhesive is too strong? This might sound awkward, but sometimes the adhesive creates a better bonding with the substrate than with the tile, causing a weak point at the tile adhesion.
Large-format tiles are the most difficult to install over an uneven surface because they have no way to bend or flex over a hump or valley. Mosaic tiles, however, can be installed over extremely uneven surfaces with little problem.
If a tile has been fixed using a ready – mixed adhesive, the likelihood of cracking is increased, as the surface beneath may still be wet – weakening the tile and increasing the chances of slipping or cracking.
With your 12×24 tiles you should use a 1/2″ notched trowel on the wall and back butter each tile, but just with a skim coat. Tile trowels come in many shapes and sizes, generally starting out from a 3/16″ v- notch up to the 1/2″ square notch.
Although not necessary for tile coverage, back buttering can be effective by increasing the bond of the mortar to the back of the tile which is an excellent benefit.
Floors: A 1/4 – inch minimum thickness is needed, but thicker panels are also fine. Walls: Use 1/2- inch or 5/8- inch -thick cement board, not 1/4 – inch. The extra thickness is needed to span the studs and provide a solid base for the tile.