FAQ

FLEXBOND
®
CRACK PREVENTION MORTAR
SUITABLE FOR BONDING TILE OVER
USG LEVELROCK
®
BRAND FLOOR UNDERLAYMENT
TB3A
CUSTOM
®
considers the LEVELROCK
®
Brand Floor Underlayment,
as manufactured by US Gypsum (USG), and installed by
USG licensed LEVELROCK
®
Applicators in accordance with their
directions, a suitable underlayment for the installation of
ceramic tile with CUSTOM
®
's FlexBond
®
Crack Prevention Mortar.
LEVELROCK
®
underlayments and radiant floor heating systems
are being specified in multi-level condominiums, hotels and
high-rise office buildings in conjunction with ceramic tile and
dimensional stone installations.
Tile and dimensional stone can be installed over LEVELROCK
®
Underlayments in areas designated as interior, dry, and above
grade floors for residential and commercial traffic. Once the
LEVELROCK
®
Underlayment is properly installed and cured in
accordance with the manufacturer’s directions, preparation for
the installation of ceramic tile may begin.
STEP 1
LEVELROCK
®
Brand Underlayments must be installed by a USG
licensed applicator according to US Gypsum requirements.
STEP 2
LEVELROCK
®
Brand Underlayments must be cured, dry and free
of all contaminates and all cracks, with any defects repaired per
USG specifications.
STEP 3
In order to receive tile, all LEVELROCK
®
Brand Underlayments
must be sealed with USG Sealer per US Gypsum requirements.
STEP 4
Install tile with CUSTOM
®
's FlexBond
®
Crack Prevention Mortar
according to ANSI A108.5 specifications.
STEP 5
Grout with CUSTOM
®
's Polyblend
®
according to ANSI A108.10
specifications.
WARRANTY SYSTEM
Custom
®
Building Products has given this tile installation system
utilizing FlexBond
®
Crack Prevention Mortar and Polyblend
®
Grout a 15 year warranty. An additional 5 year warranty can be
obtained by applying CUSTOM
®
's RedGard
®
Waterproofing and
Crack Prevention Membrane prior to STEP 4.
This warranty is subject to the terms and conditions of the
Installations Systems Warranty.
Please contact CUSTOM
®
's Architectural Services Department
at 800-282-8786 for further system or warranty details.
The warranty and performance of LEVELROCK
®
Brand Floor
Underlayment is the responsibility of US Gypsum Company,
and not that of Custom
®
Building Products.
Technical Services 800-282-8786
custombuildingproducts.com
Technical Bulletin
©2013 6/13R
The information in this bulletin is presented in good faith, but no warranty,
express or implied, is given nor is freedom from any patent in as much as
any assistance furnished by CUSTOM
®
with reference to the safe use and
disposal of its products provided without charge. Custom
®
Building Products
assumes no obligation or liability therefore, except to the extent that any such
assistance shall be given in good faith.