Page 14 - Tiling Guide Uniclass Index

9 GENERAL FIXING TECHNIQUES
For best practice, tiling should be carried out in accordance with BS 5385, the British Standard for wall and floor tiling, and BS 8000, the British Standard for Workmanship on building sites.
• Adhesives should be spread evenly with a suitable notched trowel.
• Dot and Dab is not an acceptable method of fixing tiles on either walls or floors.
• Tiles should be positioned on the adhesive bed within the adhesive open time.
• Hold the spreading trowel at an angle of greater than 45 degrees. Tiles should be gently pressed into the adhesive bed with a slight twisting action to achieve sufficient contact.
• It is important to trowel out the adhesive ribs in one (straight) direction, which helps to prevent air becoming trapped between the tiles.
• In exterior locations, internal wet areas or floors, 100% adhesive coverage of the tile should be achieved with no voids.
• Ready mixed adhesives should only be used on walls and where thin bed application is appropriate (i.e. max bed depth = 3mm). Ready mixed adhesive is not suitable for fixing porcelain tiles.
• Where limited movement or vibration is expected, a suitable deformable adhesive should be used. Consult the adhesive manufacturer for guidance.
• Tiles larger than 0.1m2 to be fixed above 3m from floor level should be secured by mechanical fixings.
• It is advisable to use tile spacers, however they should always be removed prior to grouting.
• There is currently no British Standard covering the use of levelling clips.
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