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Can
I tile over existing ceramic tile?
This is done regularly where there is not a floor height
or wall thickness limitation and where the existing
tile is well-bonded. To insure a good bond to the existing
tile, certain procedures need to be followed; these
are described in the TCA
Handbook for Ceramic Tile Installation in detail
TR712 and TR-713.
> Note: Not all thin-sets (nor polymer modified
thinsets) are capable of bonding directly to tile -
please consult the grout and mortar manufacturers specified
for their recommended thinsets. Also, depending on the
tile already installed, in some cases the tile must
be mechanically abraded to insure a good bond - this
is usually best determined with a "bond test".
Caution: Mechanical or chemical abrasion to tile
can release fine particles which could cause harm if
inhaled or ingested. Mineral analysis of the tile and
glaze should be performed before performing any operation.
Appropriate saftey equipment should be worn at all times.
There are many labs including the
TCNA lab that can provide toxic metals analysis
as well as shear bond testing.
Can I tile over other
types of flooring?
Guidelines for tiling over other surfacing materials
are covered in the Renovation section of the TCA Handbook.
The TCA Handbook
detail that covers this application is TR711. When tiling
over other surfaces always make sure to check with the
mortar and grout manufacturers to find the right material
for bonding to the surface in question.
The manufacturers' of tile
cement (thinset) have developed specialty formulations
for setting tile that are designed to bond well to specific
surfaces. However, as with all tile installations, the
entire substrate below the tile is important - not only
the layer to which the tile is bonded.
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