USG Levelrock Floor Underlayment Finished Floor - Manual (Page 2)

Table of contents
Levelrock Floor Underlayment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Substrate Requirements for Levelrock Floor Underlayment . . . . . . . . . . . . . . 3
Surface Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-4
Underlayment Surface Preparation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5-6
General Recommendations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-9
Layered Warranties . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
References . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-15
Levelrock Floor Underlayment
From commercial to multi-family projects, renovation to new construction, L
eveLrock
® floor
underlayment from USG pours on the strength . S
tronger
-t
han
-c
oncrete
™ fast-applying
gypsum concrete, engineered cements and flooring systems offer the industry’s highest
compressive strengths with exceptional acoustical performance to reduce noise between
floors and units . L
eveLrock
floor underlayments provide a smooth, crack-resistant surface that
accept virtually all types of floor coverings including vinyl, composition tile, ceramic tile, wood
laminate, glue-down hardwood and carpeting .
Created for a wide range of applications, L
eveLrock
floor underlayments are available in
several formulations including radiant heat, corrugated steel deck and eco-friendly green
formulations . L
eveLrock
products and systems are designed to meet the new International
Building Code (IBC) and were the first to ensure that all sound systems are fire-rated and
easily specified by a UL Design number . L
eveLrock
floor underlayments provide approximate
compressive strengths of 2000 psi up to 10,000 psi (depending on the floor underlayment
used and sand and water ratio) .
Note *Commercial floor applications recommend underlayments with minimum compressive strengths of 3500 psi . In addition,
the Tile council of North America recommends a minimum of 2000 psi as well as the use of a crack isolation membrane such as
D
urock ™ tile membrane for all tile installations .
2