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Top tips for tiling with non-mesh backed large format thin porcelain

When fixing large format thin porcelain tiles, it’s crucial your adhesive has speed of set, but also longer open and working times to allow your tiles to be carried into place.

BAL recommends using rapid–setting adhesives such as its Rapid-Flex One – which offers fixers an hour pot life, plus 30 minutes open time. This offers fixers plenty of time to cut, move, back-butter and fix large format thin porcelain tiles, the manufacturer says.
The adhesive reportedly offers a high initial bond, and with a set time of 3-4 hours, ensures large-format thin porcelain tiles are firmly fixed to walls or floors with no slumping or movement.

The key thing to remember when fixing thin porcelain tiles is that the background must be sufficiently flat to SR1 surface regularity. Surface regularity is measured by placing a 2m straight-edge on the surface and measuring any gaps underneath with a slip gauge.

SR1 is High Standard and allows for a maximum gap at any point of 3mm. Deviations in the floor surface could reflect and show through the final tile layer or, could lead to tiles being unsupported by inconsistent adhesive bed thicknesses beneath the tile.

Tiles should be solidly supported by the tile adhesive. Air pockets or voids beneath the tiles are potential points of weakness due to an impact from a heavy object.

In addition, back butter large format tiles by applying a thin bed of adhesive on the back of the tiles to fill in any deep keys or heavily buttoned back tile profiles before placing into the adhesive ribs, applied using the correct notched trowel to the wall.

To achieve SR1 surface regularity on the floors, prior to fixing the tiles, fixers or contractors should use a suitable levelling compound such as BAL Level Max or BAL Level Fast.

Wall backgrounds should be prepared to SR1 with tile backer boards such as BAL Board or brickwork and blockwork can be rendered with a product such as BAL Quickset Render.

For any thin porcelain project, tilers can contact BAL Technical Helpline on 03330 030160 for a full specification and project support.
www.bal-adhesives.com

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