USG Levelrock Floor Underlayment Finished Floor - Manual (Page 9)

Floating Floors. Glue boards edge to edge
and float on a 1/8 in . (3 mm) foam pad .
Solid Wood Flooring
Use a nail-down sleeper system . Install
tubing between 2 x 4 sleepers, which are
attached to the subfloor . Pour L
eveLrock
RH
floor underlayment or L
eveLrock
Commercial
RH floor underlayment between the spaces
around the tubes to provide thermal mass .
Underlayment must be 3/4-in . minimum
above the top of the radiant heating tubes .
When floor underlayment is completely dry,
install a vapor barrier, and nail boards to the
nailing sleepers . Be careful not to puncture
the radiant heating tubes when nailing down
solid wood floor . This system offers limited
insulation above the radiant system . For
best results, refer to the radiant heat system
manufacturer’s recommendations .
Note: The floor surface temperature should never exceed 85
°F (29 °C) when laminated, parquet or solid wood floors are
installed over radiant systems .
Sheet vinyl and vinyl composition Tiles
According to vinyl industry recommendations,
the floor surface temperature should never
exceed 85 °F (29 °C) . During adhesive and
tile installation, lower the floor temperature .
Working time and open time of adhesive can
be affected by floor temperature .
■
Layered Warranties
The following manufacturers provide a warranty on their products when used as specified
in conjunction with L
eveLrock
products . For further details, please contact the product
manufacturer or your L
eveLrock
/a
Lcorp
Network representative .
Merkrete (merkrete .com), a division of Parex USA Inc. , will provide a 15-year warranty
over all L
eveLrock
materials meeting TCNA requirements as tile/stone underlayments . When
installed with Merkrete Fracture Guard 5000, Fracture Guard FD; Merkrete Hydro
Guard 2000, Hydro Guard 1, Hydro Guard SP-1; and Merkrete grouts and Merkrete
700 and 800 series thin-set mortars as a system, Merkrete will provide their standard
15-year warranty over L
eveLrock
materials meeting USG specifications and standard of care
requirements for application .
custom Building Products (custombuildingproducts .com) provides a 10-year warranty on
its MegaFlex ® crack prevention mortar when used in place of a crack-isolation membrane,
with L
eveLrock
floor underlayment and L
eveLrock ™ SRM-25 ™ r
eaDy
S
eam ™ sound mat or
L
eveLrock
™ SRB ™ sound board . For floors without a sound reduction mat, Custom Building
Products provides a 10-year warranty with FlexBond ® crack prevention mortar when used
over L
eveLrock
floor underlayment in place of a crack isolation membrane . For more information,
contact your L
eveLrock
/a
Lcorp
Network representative or Custom Building Products .
Installation
9