Installation Instructions

Suboor
Construction/ Comments Notes
Materials
Congoleum • UnderFlor is an underlayment system
for oating installations of DuraCeramic,
DuraCeramic Dimensions and Ovations
over a variety of substrates in lieu of
direct bonding. See detailed
instructions on page 7.
Wood • Double layer construction over joist
or trusses on 16" centers with at
least 18" of well-ventilated air space.
• Install 1/4" or heavier underlayment
over strip wood, single layer wood floors
and APA-rated Sturd-I-Floor Systems.
Underlayment • APA underlayment grade plywood
with fully sanded face.
• Hardwood and veneer
underlayment panels.
• Lauan plywood, particleboard,
oriented strand board and chipboard
create a higher risk for installation
and adhesive failure and are not
recommended unless warranted by
the panel manufacturer or supplier.
• Not recommended over cement
backer-boards, glass mesh mortar
units or acoustical cork.
Concrete • On, above and below grade level.
• Radiant-heated oors not to
exceed 85°F (29°C).
• Minimum 100-pound dry density
• Installation over gypsum-based
acoustical toppings is not
recommended unless Congoleum
UnderFlor is used.
• Smooth, non-cushioned sheet
flooring and vinyl composition tile.
• Embossed non-cushioned and thin
cushioned vinyl flooring can be
prepared with embossing leveler
in residential applications.
• Do not install over soft, heavy
cushioned floors, flooring with a
cushioned backing, self-adhering
tile or tile installed below grade
level.
• Ceramic, marble and granite.
• Not recommended. Remove
• Portland cement-based compound
such as Ardex Feather Finish,
Mapei Plani-Patch or equal.
• Gypsum-based patching
compounds are not recommended.
Congoleum UnderFlor
UnderFlor is an all-in-one underlayment system that provides
an economical solution for installing DuraCeramic, DuraCeramic
Dimensions and Ovations as a oating ooring system over a
variety of suboor surfaces. Now, one underlayment covers it
all; wood, concrete, most old hard surface flooring, gypsum
topping, even old adhesive residue and painted surfaces.
Congoleum UnderFlor is constructed in 6’ wide rolls, and since
it is a floating underlayment, it requires no fasteners or special
tools so it’s quick and easy to install.
Roll Sizes
UF120 – 6' x 180' (120 sq. yds. or 1080 sq. ft.)
UFB07 – 6' x 16.7' (11.11 sq. yds. or 100 sq. ft.)
Recommended Use
• Residential applications on all grade levels
• Interior use in dry, heated areas
• Do not install over ramps, in showers or other wet areas
General Information
• Always roll sheets of Congoleum UnderFlor tightly around a
tube with the vinyl side out for storing and transporting.
Avoid distorting Congoleum UnderFlor.
• Condition the room and all ooring materials at a constant
temperature between 65°F (18°C) and 85°F (29°C) for
48 hours prior to, during and 48 hours after installation.
• All UnderFlor underlayment and nished ooring must be
installed with a 1/4" space around the perimeter of the room
to allow for expansion and contraction of the flooring system
and subfloor. Undercut door casing and slide finished flooring
under for a finished appearance.
• Use DS100 Adhesive only for installing Congoleum
DuraCeramic, DuraCeramic Dimensions and Ovations
over Congoleum UnderFlor. Hard setting adhesives should
not be used with Congoleum UnderFlor.
Congoleum UnderFlor Installation
Install Congoleum UnderFlor with the vinyl side down just prior
to installation of finished flooring. Determine the appropriate
seam location and direction of the underlayment (depending
on the finished flooring selection).
Important
For tile installation, position UnderFlor with seams at least 4"
away from the joints in the nished oor tile. (Fig. 4).
Fig. 4 – Position seams at least 4" away
from tile joints.
The subfloor
system for
floating surface
must be smooth,
solid and dry.
Subfloor must
be solid and free
of movement.
Install according
to panel manu-
facturers’ written
instructions.
Moisture vapor
emissions not to
exceed 5 lbs.
or 80% RH.
Conrm
adequate
adhesion to
substrate.
Light Weight
Concrete
(Residential
Application only)
Resilient
Floor
(See WARNING
on inside cover)
Must be single
layer, fully adhered
and well bonded.
Remove wax or
polish.
Fill grout joints
and level floor.
Ceramic
and Stone
Carpet/
Laminate
Patching
Compound
Refer to manufac-
turers’ instructions
for use and
applications.
Suboor Recommendations
6
UnderFlor
May 2015