Poured as a fire and sound
barrier on wood frame structures, this product is the 
most economical, highest compressive strength (up to 3200 psi) underlayment
product available for multifamily construction. Also available in Pre-Sanded.
Key Benefits
U.S. Gypsum poured floor underlayment systems provide an economical way
to achieve lightweight, fire-resistant, sound-rated, leveling floors in
residential and light commercial construction. Typical applications are
less labor intensive than many other types of construction and provide
high fire ratings typical of gypsum systems. Designed sound systems provide
for improved STC and IIC ratings when used with acoustical mat.
Nominal Compressive Strength (aggregated) ASTM C472 2500-3500 psi
Density (aggregated) 115 lb./cu.ft.
LEVELROCK Brand Floor Underlayment 3500
Ideal for residential and commercial applications with compressive strengths from 3500-4500 psi. In residential projects, this product can be used as an upgrade in hard surface areas or as a topping to correct uneven floors in commercial applications. For higher traffic areas, it meets vinyl floor covering industry standards for non-Portland Cement underlayments. Also available in Pre-Sanded.
Key Benefits
U.S. Gypsum poured floor underlayment systems provide an economical way to achieve lightweight, fire-resistant, sound-rated, leveling floors in renovation and light commercial construction. Typical applications are less labor intensive than many other types of construction and provide high fire ratings typical of gypsum systems. Higher compressive strengths minimize floor damage from trades.
Designed sound systems provide for improved STC and IIC ratings when used with acoustical mat.
Physical Properties
Nominal Compressive Strength (aggregated) ASTM C472 3500-4000 psi
Density (aggregated) 120 lb./cu.ft.
LEVELROCK Brand Floor Underlayment 4500
One of the highest compressive strength (up to 5500 psi) gypsum floor underlayments on the market today. This product is ideal for floor corrections over concrete substrates. It can be applied at variable thickness up to 3 inches, making it ideal for heavy-traffic commercial, institutional, and renovation projects. Also available in Pre-Sanded.
Key Benefits
U.S. Gypsum poured floor underlayment systems provide an
economical way to achieve lightweight, fire-resistant, sound-rated, self-leveling floors in residential and light commercial construction. Typical applications are less labor intensive than many other types of construction and provide high fire ratings typical of gypsum systems. Higher compressive strengths minimize floor damage from trades.
Designed sound systems provide for improved STC and IIC ratings when used with acoustical mat.
Physical Properties
Nominal Compressive Strength (aggregated) ASTM C472 4500-5500 psi
Density (aggregated) 125 lb./cu.ft.
LEVELROCK Brand Floor Underlayment RH (Radiant Heat)
LEVELROCK Brand Floor Underlayment RH (Radiant Heat) is
specifically formulated for electrical and hot water radiant heat floor installations. The non-shrinking nature of LEVELROCK Brand Floor Underlayment RH locks tubing in place, preventing noise and tubing chafing, and its special formulation prevents the high temperature associated with radiant heat floors from breaking down the floor matrix. Also available in Pre-Sanded.
Key Benefits
U.S. Gypsum poured floor underlayment systems provide an economical way to achieve lightweight, fire-resistant, sound-rated, leveling floors in residential and light commercial construction. Typical applications are less labor intensive than many other types of construction and provide high fire ratings typical of gypsum systems. Higher compressive strengths minimize floor damage from trades.
Physical Properties
Nominal Compressive Strength (aggregated) ASTM C472 2500-3200 psi
Density (aggregated) 115 lb./cu.ft.Limitations
USG poured gypsum floor underlayment systems should not:
- Be used as a wearing surface.
- Be installed where continuous exposure to moisture is a possibility (for instance, exterior balconies or shower rooms).
- Not recommended for radiant heat systems with prolonged operation temperatures exceeding 150°F.
- Be installed in below-grade
applications.
Installation
During the entire installation process, the building must be enclosed and temperature maintained at 50°F minimum until permanent heating is available. Adequate ventilation must be provided to ensure uniform drying of the installed gypsum floor underlayment, which typically occurs within 10-14 days at 1-1/2 inch thickness. Limit design of the subfloor and framing to a minimum of L/360 to prevent undue stress from occurring in the floor fill material, as this stress may produce cracks. Over plywood subfloors, tongue-and-groove edge supported type plywood is recommended for meeting this deflection criterion. The application of LEVELROCK Brand Primer to the subfloor is necessary to provide maximum bond between the underlayment and subfloor. Concrete slabs that are receiving gypsum underlayment systems must be properly cured (generally for a minimum of 28 days) prior to the underlayment installation. Concrete slabs should be properly treated with LEVELROCK Brand Primer according to manufacturer's recommendations.
LEVELROCK Brand Floor Underlayment PROFLOW
LEVELROCK Brand Floor Underlayment PROFLOW is the highest strength gypsum
concrete underlayment in the industry. Designed for use in commercial, institutional and rehab construction, this self-leveling product applies from feather-edge to 1-inch thick over concrete slabs, pre-stressed concrete and concrete planks. It accepts a variety of floor coverings and is ideal for high-traffic applications. It may also be used as a finished floor surface when covered with an approved coating.Key Benefits
LEVELROCK Brand Floor Underlayment PROFLOW provide an economical
way to achieve lightweight, self-leveling floors in commercial and institutional construction.
Typical applications are less labor intensive than many other types of construction.
Higher compressive strengths minimize floor damage from trades and allow underlayment to be uncovered during construction.High compressive strengths at low thickness provides the answer to flooring problems.
Blending with sand at the factory reduces job variables resulting in high quality installations.Application over concrete floors eliminates costly preparation methods.
Physical Properties
Nominal Compressive Strength (aggregated) ASTM C472 6000-8000 psi
Density (aggregated) 130 lb./cu.ft.
LEVELROCK® Underlayment RH Saves Time and Helps Homeowners Maintain Critical Design Elements
The answer: Radiant heat flooring and LEVELROCK®
Brand Floor Underlayment RH (Radiant Heat) throughout the cabin.
"LEVELROCK RH underlayment afforded me two things,"
said the husband and homeowner, who oversaw the project. "The first
one was time. The system is stronger than competitive products, and we
were able to pour the floor before the drywall was installed. Second,
LEVELROCK RH underlayment is rated at 2,500 psi, so it's harder than competitive
underlayment products. We poured it to 2 inches and didn't have to put
down a high-strength ceramic tile backer board."
The
homeowners installed tile, which was used in the kitchen, dining room,
foyer and bathrooms, directly on top of the underlayment. In addition,
the underlayment's high strength eliminated the need for a crack isolation
membrane. "With a competitive product, we would have
had to put cement board on top of that, and then glued the tile down,"
added the homeowner. "LEVELROCK underlayment is economical and dries
quickly, so you can get in and out fast."
Royal Radiant Heat of Holland, Mich., installed the RH system in two days. A crew of five from S & S Poured Floors, Millersburg, Ind., poured three pallets of underlayment in just five hours over the tubing, providing a thermal mass substrate that boosts the heating system's efficiency. Douglas fir flooring covered the system in the bedrooms, upstairs loft area and great room. The cozy home was designed by Rocky Mountain Log Homes of Hamilton, Mont., and took about 13 months to build.
LEVELROCK RH underlayment also proved to be ideal for locking the radiant heat tubes in place during construction. The non-shrinking nature of the underlayment prevents noise and tube chafing. In addition, its special formulation prevents damage and deterioration that is often associated with the high temperatures of radiant heat flooring.