Installing Tiles & Veneers

Stone tiles, stone veneers or stone cladding are generally thin pieces of stones (10 - 20mm thick) fixed to walls or floors (the “substrate”) with an appropriate adhesive.

Stone tiles & stone veneers are good for high-traffic flooring and/or outdoor renovations, but must be installed correctly to ensure an excellent finish.

Below is our “quick guide” for installing stone tiles & stone veneers, but if in doubt, please contact us for professional help.

Substrate: WALLS

Brick masonry- best surface for stone tiles and veneers except for hard burnt and glazed bricks.

Brick on edge- also suitable for stone veneers.

Stonesheet- the main issue when adhering to cement sheeting is contact between the glue and the board as the weight of the stone veneer can break the glue bond.
BGC’s 9mm Stonesheet (www.bgc.com.au) is one of the only compressed cement sheeting we know rated to handle the weight of most stone veneers. A suitable primer and adhesive must be used according to the manufacturer’s instructions.

Tiltup Concrete - before applying stone veneer, the walls must be mechanically abraded by sandblasting, grinding, or scarifying, to remove releasing agent used in the production of tilt up walls. Otherwise, the agent can cause the glue to not adhere to the concrete

MagRoc- magnesium oxide sheeting (www.magroc.com) is a suitable substrate for stone veneers that fall within the weight tolerance.

Hebel- AAC (autoclaved aerated concrete) is a very lightweight building material and has weight limitations when it comes to stone veneers. It may be suitable for lighter, thinner veneers, but before applying any kind of stone veneer to Hebel, make sure you check the manufacturer’s specifications and discuss the type of stone you will use with us.

Blueboard  - NOT suitable for stone veneers. If you want to create an exterior wall with the intention of installing stone veneer, DO NOT use Blueboard; use Stonesheet or MagRoc instead. If you want to add stone veneer to an existing Blueboard wall, you will need to either cover the Blueboard with Stonesheet or replace it.

Substrate: FLOORS

Concrete- best base so as to avoid flex damage to grout and joins.

Floorboards - NOT a suitable substrate for stone tiling.It is possible to lay Stonesheet over floorboard but you need to check with the builder to ensure the structure is sound.

Installation Process

Adhesive- Master Grip Lite is a superior polymer based adhesive for all substrates including pool tiles and pool coping.

Primer- Master Primer assists in bonding adhesive to the substrate and is recommended for most substrates.

Method

Stone should be fixed according to the Australian Standard using the Tarver Method to adhere stone to the substrate:

Spread the adhesive on the surface to achieve the best possible mechanical bond. Rib the adhesive with a notched 12mm trowel to obtain a uniform thickness. When the trowel is held at an appropriate angle and its notched side is drawn over the adhesive, it will give a series of parallel ribs. The back of the tiles should have a thin screed of adhesive applied. The tiles should then be pressed into and moved at least the width of a rib perpendicular to the adhesive ribs. This should achieve both the minimum required coverage and bed thickness. Up to 90% of the tile should be covered. This operation has to be carried out correctly as adequate ribs are essential to ensure an evenly distributed area of contact between tile and adhesive.

For further information on Australian Standards visit http://www.australiantilecouncil.com.au/

These ribs should be horizontal for walls.

When installing stone veneers and large format tiles, we recommend buttering the back of the stone with up to 90% adhesive. This involves keying/applying the adhesive onto the back of the stone in a thin layer. Clean the back of the stone of dirt and dust prior to application.

There can be some bleeding of moisture on dark coloured tiles; using the above adhesives and method should minimise this. Stone may also be pre sealed if preferred.

Further Tips

We recommend a minimum grout joint of 3mm as different stones have varying tolerances