Specification

TILING 09 30 00 Setting / TDS-192
Bonding to Plywood Surfaces
Plywood floors, including those under resilient flooring, must be
structurally sound and must meet all ANSI A108.01 Part 3.4
requirements. Maximum allowable deflection: L/360 tile L/720 stone.
See TCNA F150-13 Tile Installations, TCNA F141-13 and F250-13 for
Stone. For questions about proper subfloor installation requirements,
call Custom technical services.
Bonding to Backerboards
As an alternative to an additional layer of plywood, WonderBoard
backerboard may be installed over plywood subfloors for ceramic tile
installations. Refer to TCNA F144-13 tile installations, TCNA F250-13
stone installations. Call Custom technical services when installing
natural stone over plywood subfloor.
Bonding to Existing Surfacing Material
Existing Ceramic Tile, Resilient Flooring or Plastic Laminates: Resilient
flooring or plastic laminates must be well bonded, as well as clean and
free of all contaminates. Roughen the surface by sanding or scarifying;
rinse and allow to dry. Do not sand flooring that contains asbestos. For
existing well bonded ceramic tile, mechanically abrade the surface.
Rinse and allow to dry. When sanding, an approved respirator should
be used.
Bonding to Cutback Adhesive
Adhesive layers must be removed, as they reduce mortar bond
strength to cement surfaces. Use extreme caution; adhesives may
contain asbestos fibers. Do not sand or grind adhesive residue, as
harmful dust may result. Never use adhesive removers or solvents, as
they soften the adhesive and may cause it to penetrate into the
concrete. Adhesive residue must be wet scraped to the finished
surface of the concrete, leaving only the transparent staining from the
glue. To determine desirable results, do a test bond area before
starting.RefertotheRFCIPamphlet,“RecommendedWorkPractices
forRemovalofResilientFloorCoverings”forfurtherinformation.
Expansion Joint placement
Expansion joints and cold joints, as described in ANSI A108.01, should
never be bridged with setting material. They must be brought through
the tile work and filled with an appropriate elastomeric sealant, such
as Custom's 100% Silicone. Contact Custom's Technical Services for
the proper treatment of control or saw cut joints. Refer to TCNA
EJ171, F125 & F125A.
Mixing Ratios
Thoroughly mix 6 quarts (5.68 L) clean, cool water and 50 lb. (22.68
kg) bag of powder together to a smooth, paste-like consistency. When
setting over Exterior Grade Plywood, use 1 quart (0.95 L) of Thin-Set
Admix Concentrate and 5 quarts (4.73 L) clean, cool water to meet
ANSI A118.11 requirements.
Mixing Procedures
Mixbyhandorusealow150–200rpmspeed1/2"(13mm)drillto
achieve a smooth, paste-like consistency. Let the mixture slake or
stand5–10minutes;stiragainanduse.Stiroccasionally,butdonot
add more water. When properly mixed, troweled ridges will stand
without slump.
Application of Product
INSTALLATION TO CONFORM TO ANSI A108.5. Use a properly-sized
notched trowel to ensure 100% coverage under tiles. Using flat side of
trowel, apply skim coat of mortar to the surface. Apply additional
mortarwithnotchedsideoftrowelheldata45°angletothesurface,
combing in one direction. Press tile firmly into place in a perpendicular
motion across ridges, moving back and forth. Perpendicular pressing
flattens ridges and closes valleys allowing maximum coverage. With
some tile, back-buttering is advisable. Adjust tile promptly and beat in
with a beating block and rubber mallet. Mortar can be applied up to
1/4" (6 mm) thick after beat in. Periodically pull up a tile and check the
back to ensure complete coverage with the adhesive. Do not spread
more material than can be tiled in 15 minutes or while material has
wet tack (sticky to the touch). If material has skinned over (not sticky),
recomb with notched trowel. If too dry, remove and replace with fresh
material. Material in bucket will remain workable approximately 2
hours.
Curing of Product
Allow to cure for 24 hours before grouting or light traffic, depending
upontemperatureandhumidity.Polyblend®orPrism®SureColor®
Grout is recommended.
Cleaning of equipment
Clean with water before the material dries.
Storage
Store in a cool dry area.
Health Precautions
This product contains Portland cement and free silica. Avoid eye
contact or prolonged contact with skin. Wash thoroughly after
handling. If eye contact occurs, flush with water for 15 minutes and
consult a physician. Do not breathe dust; wear a NIOSH approved
respirator
Conformance to Building Codes
Installation must comply with the requirements of all applicable local,
state and federal code jurisdictions.
6 Availability & Cost
Item Code Size Color Package
MSMG50 50 lb (22.68 kg) Gray Bag
MSMW50 50 lb (22.68 kg) White Bag
MultiSet Modified Thin-Set Mortar
Published Date: 1/17/2014