GENERAL SPECIFICATION FOR INSTALLING UNDER TILE HEATING ELEMENTS AND FIXING GLAZED CERAMIC FLOOR TILES OR PORCELAIN TILES ON INTERIOR SURFACE BEDS OR SUSPENDED SLABS

 

Please note that ‘general’ specifications are issued for information purposes, and should not be used as project specifications.  

As each and every project needs to be assessed individually on its own merits and characteristics please contact the  TAL Technical Advice Centre for a project-specific detailed materials and methods specification for specific projects.  

 

It is important that the tile selected is suitable for the application, preferably against a written Supplier’s specification.  Factors such as water absorption, irreversible moisture expansion, MOR and PEI ratings, chemical resistance and overall stability of the product need to meet the requirements of the service conditions.  

The backs of all tiles must be clean and free from dust and contaminants.

 

Please note that any “wet” areas, such as showers or balconies, should be waterproofed using   TAL SUPERFLEX I or TAL SUREPROOFwaterproofing compounds prior to commencing tiling.  Please feel free to contact us for a specification for waterproofing and tiling these areas, as well as for technical literature on any of our products.

 

TAL PRODUCT REQUIREMENTS

The TAL products required for this installation are as follows:

Under Tile Heating Installation
TAL FLOOR PRIMER / TAL FLOORKEY
TAL SUPERSCREED
TAL SCREEDBINDER

Tile Installation
TAL KEYCOAT *
TAL PROFESSIONAL – Ceramic Floor Tiles
TAL GOLDSTAR 6 – Porcelain Tiles
TAL WALL & FLOOR GROUT
TAL BOND/ TAL BOND POWDER
NOTCHED FLOOR TROWEL
SPACERS
TAL SEALMASTER CORD
TAL GOLD STAR SEALMASTER 1000

 

Special note must be taken of the following:

Adhesive System:

Ceramic Tiles

We have specified TAL Professional conventional (standard setting) cementitious adhesive for the installation of the ceramic tiles.  It must be noted that, when using conventional adhesives, it is imperative that newly installed tiles are not trafficked or grouted for a minimum of 24 hours after installation.  If the tiles are disturbed (trafficked) before the adhesive has set sufficiently the adhesive bond may be broken, resulting in the tiles being loose or hollow sounding.

If quicker access is required we recommend that TAL GOLDSTAR 12 

quick-setting high strength adhesive (grout after    6 – 8 hours, trafficable after 12 hours) be used.

Porcelain Tiles

We have specified the use of TAL GOLDSTAR 6 rapid setting high strength adhesive for the installation of the porcelain tiles.  However, if timing on this project allows for a quick setting adhesive option, then TAL GOLDSTAR 12 can be considered.   

The advantages of using TAL GOLDSTAR 12 are as follows :

It is however important that newly installed tiles are protected from traffic (other trades, etc) for a minimum of 12 hours, while the adhesive sets.   This is especially important in fast-track installations.

 

Note : We have specified a latex-modified adhesive and grout system for this installation, with tile panel movement joints at closer centres, to allow for the anticipated thermal expansion and contraction associated with floor heating systems.

 

Tile Panel Movement Joints & Perimeter Joints :

It should be noted that the lack of movement joints in a tile panel, or poorly constructed joints,  is a major cause of tile failure.  Joints must be created at the required spacing and must be well raked out to remove all traces of adhesive residues, debris, contamination, etc, ie the joint must extend through the tile and tile adhesive layers. These joints must be filled with TAL GOLDSTAR SEALMASTER 1000 Polyurethane Joint Sealant (and suitable backing cord where applicable) in accordance with the manufacturer’s instructions.

(See later detail of correctly constructed tile panel movement joint and perimeter joint.)  

 

 

 

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