Thin-Body Glass Mosaic Installation Guide

We recommend a professional installer, experienced with the following 'direct bond' technique, perform the work. Testing the installation technique, grouting and finishing, cutting, checking squareness of the sheets, and generally being fully aware of the characteristics of the glass being installed and the setting materials being used is required prior to commencing the job.

We further recommend the use of bright white thin-set (Mapei Adesilex P-10) and white grout for glass mosaics. If a coloured grout is specified, the use of a matching coloured epoxy setting and grouting system (Mapei Kerapoxy) may be considered.

  1. Using a flat trowel, key the thin-set into the substrate by pressing firmly. Slightly dampening absorptive substrates such as cementitious backer boards (CBU) or cement levelling coats is usually recommended. Pre-dampening drywall is not recommended.
  2. Apply additional thin-set. Use a 3/16" V-notch trowel, or larger as may be required, and comb the thin-set in one direction.
  3. Using a flat trowel, level the ridges of the thin-set creating a smooth consistent thickness. Warning, any trowel grooves visible will remain so through the glass mosaic. Pull only enough material to complete an area without a chance of the thin-set skinning over. The installer must take the final decision on how thick a layer of thin-set is used.
  4. Apply glass mosaic, either mesh side down, or paper side up, and align properly. Use a wooden beating block and hammer to lightly tap the tile level and to achieve 100% contact with the thin-set. Thin-set should not be allowed to squeeze up excessively between the joints. Re-align sheets.
  5. After the thin-set has been allowed to stiffen up reasonably, align sheets and any crooked tiles, or replace those deemed unacceptable for any reason. It may be easier to cut unacceptable tiles from the sheets prior to installation. If the mosaic is paper-face mounted, use of warm water or wallpaper remover may allow faster removal of the paper-face. Do not allow excess water to contact the setting material. Clean all excess thin-set from the joints. Use of a stiff brush or a pointer is preferred to a sponge and water. Do not conduct an initial clean beyond these steps.
  6. After a minimum 48 hours, wash and clean the tiles. Let the installation dry prior to grouting.
  7. Grout with the appropriate material and let set until firm. For cement-based grouts, we recommend using cheesecloth for the initial clean. This removes moisture as opposed to adding more and potentially over washing as a result of using water and sponges. After the cement-based grout has set up firmly, you can use a damp sponge to smooth grout lines. Grout with epoxy in accordance with Mapei's instructions.
  8. The final polish can be completed a minimum of 48 hours after grouting to remove grout haze and grout from wrinkles in the glass. Use Stone Tech Restore according to instructions. Apply Stone Tech Bullet Proof Sealer when appropriate. For epoxy grout, use KER-450 to remove any film, and do not apply a sealer.

Transparent Paper-Face Glass Installation with Clear Silicone

We recommend a professional installer. Testing the installation technique, grouting and finishing, cutting, checking squareness of the sheets, and generally being fully aware of the characteristics of the glass being installed and the setting materials being used is required prior to commencing the job.

  1. Apply clear colourless silicone. Use a 3/16" V-notch trowel and comb the clear silicone in one direction. Due to time constraints with the use of silicone, install no more than four square feet at a time.
  2. Use the flat side of the trowel and level the ridges of the silicone creating a smooth and consistent thickness. Warning, any lack of contact between the silicone and the back of the mosaic will look like an air bubble. The resulting voids can allow grout to penetrate under the glass mosaic. Pull only enough material to complete an area without a chance of the silicone skinning over. The installer must take the final decision on how thick a layer of silicone is used.
  3. Apply glass mosaic and align properly. Use a wooden beating block and hammer to lightly tap the tile level and to achieve 100% contact with the silicone. The silicone should not be allowed to squeeze up excessively between the joints.
  4. Immediately after setting align sheets and any crooked tiles, or replace those deemed unacceptable for any reason. It may be easier to cut unacceptable tiles from the sheets prior to installation. If required, the use of warm water or wallpaper remover may allow faster removal of the paper-face. Do not introduce excessive water or wallpaper remover to the silicone. Clean excessive silicone from the joints. Do not conduct an initial clean beyond these steps.
  5. After 24 hours, wash and clean the tiles. Let any residual water in the joints dry prior to grouting.
  6. Grout with Mapei Keracolour or Opticolour grout and let set until firm. We recommend using cheesecloth for the initial clean. This removes moisture as opposed to adding more and potentially over washing as a result of using water and sponges. After the grout has set up firmly, you can use a damp sponge to smooth grout lines. Grouting with epoxy is not recommended.
  7. The final polish can be completed a minimum of 48 hours after grouting to remove grout haze and grout from wrinkles in the glass. Use Stone Tech Restore grout haze remover according to instructions. Apply Stone Tech Bullet Proof Sealer when appropriate.

Inspection

Inspect each carton to ensure shade consistency and acceptability. Due to the handmade nature of glass, we recommend sheets be randomly taken from various boxes to ensure shade acceptability prior to installation.


Installation

Testing the installation technique, grouting and finishing, cutting, checking squareness of the sheets, and generally being fully aware of the characteristics of the glass being installed and the setting materials being used is required prior to commencing the job.

We do not recommend the use of adhesive to install glass mosaics.

We recommend the use of an anti-fracture membrane where applicable.

Test the colour of setting material and grout prior to installation. Get customer approval before installing.

Allow for movement control joints as required.

We do not recommend installation directly to plywood or other wood products.

We recommend the use of bright white thin-set (Mapei Adesilex P-10) and white grout. If a coloured grout is specified, the use of a matching coloured epoxy setting and grouting system (Mapei Kerapoxy) may be considered.

Use a wooden block and hammer to gently tap tiles into the mortar bed and to flatten them, not a rubber float or your hands.

Mesh used for mounting transparent glass mosaics may remain visible through the tile after installation.


Install in accordance with:

  • TTMAC 09300 2002 Tile Installation Manual
  • TCA Tile Council of America 2005 Installation Handbook
  • Oceanside Glasstile Owners Manual (regarding installation)
  • Mapei Cements recommendations on each product.
  • Schluter Installation Systems for Tile and Stone
  • Stonetech Professional Sealers

Setting material:

  • Mapei Adesilex P-10 White Thin-set
  • Mapei Keracolour or Opticolour grout
  • Mapei Kerapoxy colour matched set and grout
  • Mapei Mapelastic-SM anti-fracture membrane
  • Stonetech Restore grout residue remover

This guide is subject to our Terms and Conditions of Sale. Small chips, shade variations, size variations, and mounting squareness are all expected and normal aspects of mosaics and are not considered grounds for claim. No claims will be considered after installation.