Installation Guide

DESCRIPTION
4 to 1 is a preblended mixture of finely graded sand and Portland cement
used for thick-bed mortar installations. 4 to 1 flattens and levels an existing
substrate before the installation of tile and stone.
FEATURES AND BENEFITS
Screed and level from 3/8" to 3" (10 mm to 7,5 cm)
Ideal for floating shower bases
Mix with water or Planicrete
®
AC
INDUSTRY STANDARDS AND APPROVAL
LEED v4 Points Contribution LEED Points
Health Product Declaration (HPD)* ..........................................Up to 2 points
* Using this product may help contribute to LEED certification of projects in the
category shown above. Points are awarded based on contributions of all project
materials.
Additional Green Certifications
Living Building Challenge (LBC) Red List Free: This product has been
verified per the most current Red List on the LBC’s Website.
WHERE TO USE
Floating shower bases
Can be directly bonded or used as a detached floating mortar bed over
a cleavage membrane or waterproofing membrane
For use in both residential and commercial applications in dry and wet
areas
Mixes with water. For increased performance and reduced porosity, mix
with MAPEI’s Planicrete AC latex admixture.
LIMITATIO N S
4 to 1 can be mixed with water for most interior conditions. For better
performance or for exterior or heavy-duty wet areas, mix 4 to 1 with
Planicrete AC instead of with water. For details, see the Technical Data
Sheet for Planicrete AC.
See ANSI A108.1 industry standard for details on mortar bed installations.
For direct-bond applications, the concrete surface should have a profile
of CSP #3 to #5 or greater. The surface must be primed with a slurry
bond coat mixture (see “Mixing” section for details).
Wood-frame structures must be designed to handle the loads of floating
mortar beds and tile assemblies. If the suitability of the structure is unclear,
consult a structural engineer or design consultant.
For covering large areas, contact MAPEI’s Technical Services Department
for recommendations.
Consult MAPEI’s Technical Services Department for installation recommendations
regarding substrates and conditions not listed.
SUITABLE SUBSTRATES
Cured concrete floors
Sand and Cement Mortar Mix
Mud Bed
Mi
x
Mud Bed
Mi
x
4 to 1
4 to 1
Version: Dec. 7, 2017

Summary of content (4 pages)