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Fitting

Stone Vale does not offer an installation service, however we are able to help with advice and supply of the fitting products required for installation, maintenance and renovation all types of tiles.

Our sister company Pure Adhesion Ltd. was founded in 2004 as a response to the often asked question of what products are required to fit and maintain natural stone tiles.

Please call us on 01423 815416 or visit www.pureadhesion.co.uk for further information & technical advice.

Many myths exist in the tile industry about stone flooring and wall tiles. People who are considering using stone should not be put off by stories, which usually result from mistakes made during fitting.

The main considerations people should be aware of are, surface preparation, choice of adhesive, sealing of natural stone, selection of grout colour and type, as well as ongoing maintenance.

The following is a stone tiling guide, which has been put together to guide people though their own specific tiling situation.

SURFACE PREPARATION
FLOORS  
 
Situation 1 Sub floor is not level. This could be the existing floor covering, or an old screed which is damaged etc
Directions: Use a primer and a self-leveling compound to prepare a flat tiling surface. This will make tiling much easier, allow for a tighter grout line, as well as improve the overall finished appearance of the floor.
Products: Mira X Plan or Mapei Ultraplan Renovation Screed; Rapid setting and flexible self-levelling compound.
Tips: Don’t forget to buy the primer, gives a better and smoother finish without air bubbles. You can tile onto it after just 4-5 hours.

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Situation 2 Under-floor heating mats have been fitted to a leveled floor of concrete, tiling boards, or plywood.
Directions: Use a flexible self-levelling compound to cover wires.
Products: Mira X Plan or Mapei Ultraplan Renovation Screed; Rapid setting and flexible self-levelling compound.
Tips: Do not cover wires using adhesive. If tiles have to come up later, the wires will be ripped up as well. Many heating companies specify Mira X Plan so your guarantee may be invalid if you don’t use it.

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Situation 3 Substrate is floorboards, or any timber still with some bounce in the floor.
Directions: Board out the floor with re enforcing tiling boards, preferably cement based.
Products: 6mm No More Ply Boards or 6mm HardieBacker 250 Boards For Floors.
Tips: Buy the carbide tip knife made by No More Ply to make cutting the boards a lot easier. Also use countersunk and zinc plated screws to fix the boards to make sure they never rust.

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Situation 4 Floor is boarded with either plywood or specialist tiling boards.
Directions: Bond all areas to be tiled using a specialist tilers primer and bonding agent
Products: Larsen Acrylic Primer or Mira 4180 Acrylic Primer.
Tips: Don’t just use PVA. If moisture reaches the primer it will return to a liquid.

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Situation 5 Sub floor is already flat or under floor heating is already set in screed.
Directions: Bond all areas to be tiled using a specialist tillers primer and bonding agent.
Products: Larsen Acrylic Primer or Mira 4180 Acrylic Primer
Tips: Don’t just use PVA. If moisture reaches the primer it will return to a liquid.

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SURFACE PREPARATION
Walls
  
 
Situation 1 Tiling onto plasterboard, plaster, plywood or tiling board.
Directions: Bond all areas to be tiled using a specialist tillers primer and bonding agent.
Products: Larsen Acrylic Primer or Mira 4180 Acrylic Primer.
Tips: Don’t just use PVA. If moisture reaches the primer it will return to a liquid.
 
Important: Whilst we do not recommend tiling directly onto plaster, newly plastered walls and skimmed plasterboard are often fine for use with tiles up to 10mm thick. We recommend seeking a professional opinion from your tiler or builder when using heavier and thicker tiles.

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TILING  
The following is a list of rules for certain types of stone, or tiling situations
 
NOTE: We do not recommend anything other than powder adhesives in this section, because we consider ready mixed adhesives to be poorer in quality and unsuitable for use with heavier natural stone tiles. They also take longer to go off, which increases the chance of movement.
 
Situation 1 Tiling Onto Backer Boards or Timber (Floors & Walls)
Directions: Always use a flexible adhesive and ensure 100% coverage. The latex additives will allow for minor movement in the surface being tiled. Non flexible adhesives will crack and cause tiles to pop up, or crack themselves.
Products: Larsen White Flexible Adhesive S1 (20kg), Mapeker White Flexible Adhesive C2F (20kg)
Tips: If there are still signs of reasonable bounce or movement in a floor before tiling, the floor should be further stiffened. When tiling with pale tiles, use a white adhesive. When tiling with porous tiles, use a rapid setting adhesive.

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Situation 2 Tiling in a Wet Area (Floors & Walls)
Directions: Use a waterproof adhesive and ensure 100% coverage.
Products: Larsen White Flexible Adhesive S1 (20kg), Mapei Keraquick White Flexible Adhesive (20kg).
Tips: Waterproof adhesives do not block water passing through them. They are only designed to retain adhesion when wet. To waterproof a shower area or wet room, tanking systems should be fitted before tiling. We have found that most flexible adhesives have better waterproofing properties. (also see Tips: Situation 1).

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Situation 3 Tiling onto a Heated Floor
Directions:  Always use a flexible adhesive and ensure 100% coverage. The latex additives will allow for expansion and contraction. Nonflexible adhesives will crack and cause tiles to pop up, or crack themselves.
Products: Larsen White Flexible Adhesive S1 (20kg), Mapei Keraquick White Flexible Adhesive (20kg).
Tips: If the heating is a wet system, makes sure the adhesive is also waterproof. Most flexible adhesives are waterproof. (Also see Tips from Situations 1 & 2)

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Situation 4 Tiling Onto Concrete or Screed (not heated)
Directions: Use a good quality powder adhesive and ensure 100% coverage. Many professional tilers now use flexible and waterproof adhesives all the time because the quality is usually superior
Products: Larsen White Flexible Adhesive S1 (20kg), Mapeker White Flexible Adhesive C2F (20kg). 
Tips:
See Situations 1-3

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GROUT  

Using the correct grout for stone tiles is just as important as using the correct adhesive and sealer. Buying a good quality grout can not only enhance the finish but also dramatically reduce the amount of time required to maintain the stone.

Travertine, limestone, marble, granite will often benefit from being finished with a fine grained grout. The finer the grain the smoother the finish achieved. After the grout has set, a good quality fine grained grout will be as easy to keep clean as the surface of the stone itself.

Waterproof grouts are essential for use in wet areas. They are also more resistant to staining so wet recommend using waterproof grouts wherever possible.

Flexible grouts should be used when tiling onto timber, underfloor heating, as well as tiling boards.

Mapei Ultracolor Grout is excellent for all of the above. Not only is it fine grained, but also flexible and waterproof. Mapei Ultracolor Grout is available in a full range of colours to match any natural stone tile. Originally design for use in commercial kitchen and wet rooms; we believe this product is best applied in most situations. An exception would include when a courser grain grout is preferred, usually when tiling with sandstone.

THE INSTRUCTIONS ON THESE PAGES ARE PROVIDED AS A GUIDE ONLY. SPECIFIC ADVICE SHOULD BE SOUGHT ON INDIVIDUAL STONE REQUIREMENTS, AS WELL AS THE SUITABILITY OF THE PRODUCTS RECOMMENDED.

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