Laying Instructions for Khmer Ceramics glazed and Terracotta Tiles
The procedure for fixing our floor tiles is a little different from that of many other types of tiles. These instructions apply to Khmer Ceramics terracotta’s tiles, and may or may not be applicable to other tiles. Please read these laying instructions carefully and should be followed by anyone involved in the laying of Khmer ceramics terracotta tiles.
THE IMPORTANCE OF KEEPING THE TILES REALLY CLEAN THROUGHOUT THE LAYING AND SEALING PROCESS CANNOT BE OVEREMPHASIZED.
Solid concrete is the best substrate on which to lay the tiles.
Suspended timber floors should generally have a covering of plywood screwed to them so that they are rigid and cannot move. (movement of the underlying wood can crack the joints between the tiles or even the tiles themselves).
PREPARATION, SORTING AND LAYING:
Surface must be free from dust, dirt, plaster, paint, wax or any foreign matter. If laying on a newly concreted floor, it must have had sufficient time to set & dry.
The tiles may vary in width by an average of a quarter of an inch (~6mm) and must be sorted by eye for both colour and size as they are laid. Small cracks, colour and size variation all combine to make a unique and a floor rich in character.
Our tiles are extremely hard (therefore hard wearing) but can be cut with an angle grinder. However if much cutting has to be done, a wet diamond saw (e.g. clipper bench) is easy to use and can be hired.
We strongly recommend that the tiles should be laid out on the floor before applying the adhesive to ensure that the pattern fits the area to be tiled, that the joints are consistent etc. any cutting can be carried out at this stage.
We recommend a joint width of between 4-8mm. A temporary fixed chalk line can be used to keep the rows straight.
Tiles should be bedded in about 5mm (1/4 inch) of tile adhesive. We recommend a cement based adhesive such as ‘Arduit X7. Fig 1 shows the buttering of the back of the tile.
The position of the tiles can be adjusted for some 10 minutes after initial fixing. Floor tiles can be subject to light foot traffic after about 24 hours.
For Terracotta tiles:
FIRST SEALING COAT:
Before pointing, the tiles should receive their first coat of sealant. The type and make of sealant is very much a personal choice depending upon the appearance preferred and the level of ongoing maintenance required after laying.
We will be only too happy to discuss your requirements with you and can supply or recommend a range of products. Initial sealing can be carried out before, during or after laying.
Apply with a brush or polish applicator, working sealer well into the surface. Depending upon the sealant chosen surface will normally be dry enough for light traffic in 6 hours and should be left 24 hours prior to further treatment.
We recommend a propriety floor tile grout such as Bisgrout, Ardex or similar either sandstone or grey in colour to choice. Using a rubber squeegee or trowel thoroughly work the grouting mortar into the joints, (concentrate on no more than 2 metres squared at a time), ensure that the joints are completely filled to the face edge of the tile before the grout starts to set . After the grout has firmed-up but before it has set, remove all excess grout from the surface of the tile using clean water and sponge/cloth. Again the importance of thoroughly and repeatedly cleaning the surface with clean water and a sponge after grout has been applied cannot be overemphasized.
For Terracotta tiles:
Once grouting is dry apply the second* coat of your chosen sealer over both tile and grouted areas. Leave a further 24 hrs before the floor can join everyday Life.
*Depending upon your choice of sealer you may require more coats.
Tile adhesive; Ardurit X7 or S16 (rapid setting)
Grout; Ardex or Bisgrout professional Floor tile grout, sandstone or grey.
Sealers for terracotta; ‘Paveguard’ Water based Acrylic sealer or 50:50 Boiled Linseed oil and White Spirit/turpentine
Followed by Classic wax
All products come highly recommended and can be ordered through Khmer ceramics. We strongly advise that you read the instructions on the back of the above products before use.
If you require any further information please contact us at Khmer ceramics.