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LEVELROCK® CSD™ EARLY EXPOSURE™ Floor Underlayment
Underlayment Can Be Poured up to 60 Days Before Windows and Permanent Roofing are Installed
USG set an industry benchmark when it pioneered the first poured floor underlayment for use in buildings with light-gauge steel framing and a corrugated steel deck. This innovative underlayment gives architects an economical means of designing midrise buildings up to 10 stories high.
Now, USG has raised the bar again with its introduction of a hybrid cementitious underlayment formula that provides high early strength and offers outstanding resistance to moisture. As a result, LEVELROCK CSD EARLY EXPOSURE floor underlayment can be poured up to 60 days before the building's windows and permanent roof are installed, significantly speeding and streamlining construction trade scheduling.
This revolutionary underlayment features compressive strengths from 3,500 to 5,000 psi for incredible durability in the most demanding applications. It can withstand the rigors of trade traffic throughout the construction cycle, eliminating the need for any floor patching before the finished floor is installed. And the product's smooth, monolithic surface enhances worker safety and efficiency. No competitive system even comes close to providing the unparalleled benefits of new LEVELROCK CSD EARLY EXPOSURE floor underlayment.
The underlayment can be applied at a much lower thickness than poured-in-place concrete, reducing dead load and allowing a greater number of floors for increased rentable/sellable square footage. Its self-sealing technology typically eliminates the need to seal the underlayment prior to floor-covering installation.

Other benefits of LEVELROCK CSD EARLY EXPOSURE floor underlayment include:
- - Up to 55% lighter than 3-in. concrete
- - Average pour thickness just 1-9/32-in. with standard 9/16-in. deck
- - Non-combustible
- - UL-rated assembly

View more LEVELROCK® CSD™ Early Exposure product information and literature
For additional information, contact USG's Performance Substrates and Specialty Division, 550 W. Adams St., Chicago, IL 60661-3676, call (800) 487-4431 or visit the LEVELROCK Web site at www.levelrock.com.
USG Corporation is a Fortune 500 manufacturer and distributor of high-performance building systems through its United States Gypsum Company, USG Interiors, Inc. and L&W Supply Corporation subsidiaries. Headquartered in Chicago, the company serves the residential and non-residential construction markets, repair and remodel construction markets, and industrial processes. USG's wall, ceiling, flooring and roofing products provide leading-edge building solutions for customers, while L&W Supply center locations efficiently stock and deliver building materials nationwide. For additional information, visit the USG Web site at www.usg.com.


