TILING WITH TILE ADHESIVE

TILING WITH TRADITIONAL MORTAR AFFECTS THE TILES TO BE DISLODGED

Problem

FACTORS:

• Tiling by applying traditional mortar in lumps at tile back can create voids underneath the tiles, which leads to tile fragility. Moreover, water ingress through the voids will damage the nearby areas.

• The efficiency of tile adhesive will be decreased if using with wrong methods such as applying in lumps, or use with traditional trowel. This will cause tile being dislodged at later stage.

• Tile adhesive together with notched trowel provide good adhesion by using the trowel to thoroughly apply adhesive onto substrates. It is recommended to have adhesive buttered at tiles back when tiling large size tiles in order to have the optimum efficiency of the adhesive.

• Tiles should not be immersed in water when tiling with tile adhesives. Soaked water will miss the formulated proportion between water and the adhesive. This can reduce the adhesives adhesion and leads to slip problem for wall tiling.

• Fixing large size tiles with traditional way by using traditional mortar and doing floor leveling at the same time can cause deboning problem and tile breaking at the corners.

• It is recommended to use appropriate tile adhesive according to the applications such as using high performance tile adhesive with polymer composition when fixing large size tiles.

SOLUTION

Always use tile adhesive for tiling and choose the adhesive according to type of of tiles and application.
Use notched trowel together with tile adhesive and avoid applying the adhesive in lump because this will lead to tile fragility.
Surface leveling should be done before fixing large size tile with tile adhesive.

SUBSTRATE PREPARATION

- For new substrate: it should be flat, hard, level, dry and clean with normal absorption.
- For new render or screed: it should be fully cured for 7 days per 1 cm thickness of concrete before tiling.
- For old substrate: it should be checked and scrape off any peel-off substances.
- For old substrate: it should be checked and scrape off any peel-off substances.
- Repair any uneven surfaces with repair mortar or tile adhesive.
- Smoothly render the surfaces
- Leave the areas for 48 hours before tiling.
- Remove any particles such as dust, cement, or oily stains from the surfaces.
- Dampen substrate before tiling until reaching its saturated point when the substrate is very porous or when tiling in windy or dry areas.
- The substrate has to be dry with the maximum humidity level of 3%.
- When tiling onto existing tiles, check bonding condition between the tiles and substrate. Remove any unsound tiles and re-tiling.
- If the substrates are flexible or bendable such as gypsum boards or gypsum-fiber boards, it is recommended to frame and brace them with screw for every area of 900 cm2 (or 30 x 30 cm).
- Fill in the joints of woods or fiber-cement boards with special silicone sealant.
- Then cover the joints with 10 cm-wide fiberglass mesh.
- To fix tiles on woods or cement-fiber boards, it is recommended to apply weberprim 2 primer before tiling in order to increase the bonding property and also to prevent water from the adhesive seeping into the substrates.
- It is recommended to apply weberprim 2 primer to increase the bonding property when t

APPLICATION

- Choose tile adhesive according to type of tiles and applications.
- Always use notched trowel with tile adhesive.
- If tile size exceeds 25 x 25 cm or there are grooves at tileีs back, it is recommended to have adhesive back-buttering.
- Leave the area for 24 hours before grouting.
- Grout the area with suitable tile grout according to the applications.

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