Installation Instructions
Installation Use and Care Manual
To ensure a successful installation and proper adhesion, GBM has compiled the following
installation and setting material instructions. GBM will not provide any guarantee implied or written
for any product not installed in accordance with this information. This is a general installation guide
and may not represent the specific installation guide of the product you purchased, for more details,
please refer to the product specific installation guidelines.
Due to the handmade nature of GBM glass tiles, variations in the shape, color, shade and
tone should be expected. Please inspect each box prior to installation to verify lot
consistency to assure acceptable shade variations.
IMPORTANT! READ before INSTALLATION!
Do not use any setting compounds such as mastics or epoxies that contain petroleum
distillates. Do not dilute admixtures with water.
GBM glass tiles can be installed on interior or exterior wall surfaces in wet or dry locations. GBM
glass tiles cannot be installed over flexible surfaces. They are not recommended for floor
applications (unless indicated for floor use) and should not be exposed to extreme abrasion, thermal
shock or extreme impact.
Although GBM glass tiles are designed to withstand a variety of potential hazards, carefully place
your tiles before setting to avoid surface scratches or scraping the back of the tile with tools.
Proper installation and use of materials is required to avoid stress on the glass.
Proper installation requires that the substrate be dried and cured, and the walls be properly
rendered. Most concrete cures in approximately 28 days, depending on atmospheric conditions and
mix design.
Be sure to follow the recommended cure times as indicated by the Tile Council of America handbook
for tile installation.
INSTALLATION REQUIREMENTS
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All materials should be used in accordance with manufacturers’ directions.
THINSET/MORTAR
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INSTASET Instant Adhesive Mastic (WHSPSA-ROLL), a commercial grade heavy duty thinset
membrane may be used to adhere any tile/mosaic to the substrate. This method allows for
immediate grout application, eliminates problems with thinset shrinkage, and acts as a tile crack
isolation membrane. This installation method is also rated for shower wall installations.
High performance, high polymer based non-sag thinset mortar - glue applied - with a trowel 1/4 in. x
3/16 in. V-Notch Trowel can also be used. Respect the deadline before grouting according to the
mortar / glue chosen. Please follow the mortar manufacturer's guideline for actual recommended
usage and applications.