architecture - engineering - construction

About Gypsum Underlayments

Gypsum Underlayments


The industry standard for use over wood subfloors in multifamily construction. Provides sound and fire control. Its smooth surface is ideal for finished floor goods. Gyp-Crete is an Eco-Friendly Building Product, and is GREENGUARD Gold Certified.

Gyp-Crete 2000® / 3.2 K*

Achieving strengths up to 3200 psi, designed for use in single family and light commercial construction. Also ideal for renovation projects. Gyp-Crete 2000/3.2K, an Eco-Friendly building product, is GREENGUARD Gold Certified.


Designed specifically for radiant floor heating systems. Use over hot water tubes or electric cables. Provides the ideal thermal mass, plus fire and sound control. Therma-Floor, an Eco-Friendly building product, is GREENGUARD Gold Certified.

Dura-Cap® Flooring*

Ideal for smoothing concrete slabs or precast planks in new or renovation projects. Covers old floor coverings, including vinyl asbestos tile. It can be poured from 3 inches deep to a featheredge. Compressive strengths up to 4,000 psi (27.6 MPa). Dura-Cap, an Eco-Friendly building product, is GREENGUARD Gold Certified.

Commercial Topping®*

Poured from a featheredge to 3", in new construction or renovation projects. Achieves compressive strengths of 4000 to 4500 psi and pours over VAT, VCT, terrazzo or ceramic, with no shotblasting required. Commercial Topping, an Eco-Friendly building product, is GREENGUARD Gold Certified.

*The Maxxon Green Mark:
Maxxon products with this symbol may help contribute toward points for LEED® project certification.


Preview Summary Date URL
  Maxxon Gyp-Crete High Performance Floor Underlayment
Multifamily, light commercial and commercial wood frame as well as precast, poured-in-place and prestressed concrete construction, concrete repair/renovation, and steel decks.
Apr 02, 2024 URL

Brochures | 3-Part CSI specifications

3-Part CSI specifications for Gypsum Underlayments

3-Part CSI specifications for Gypsum Underlayments
Description Format Size Download
Maxxon® underlayment in multifamily housing
Gypsum cement underlayment recommended specification for Maxxon® floor underlayment in multifamily housing
DOC 240 kB Download

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News archive:
Gyp-Crete 2000 Multifamily from Maxxon Corp. (Mar 14, 2023)
Project Spotlight: Redwood City County Office, Redwood City, CA (Jul 28, 2022)
Gypsum Underlayments from Maxxon Corp. (Nov 18, 2021)
Maxxon Gypsum Underlayments (Jun 04, 2021)
Gyp-Crete 2000/3.2K Gypsum Floor Underlayment (Aug 11, 2017)
New Continuing Education Opportunity From Maxxon Corporation (Dec 13, 2011)

Source: http:

03540 - Cementitious Underlayment
09610 - Floor Treatment
09800 - Acoustical Treatment
09820 - Acoustical Insulation and Sealant
09830 - Acoustical Barrier
09963 - Cementitious Coatings
03 54 00 - Cast Underlayment
03 54 13 - Gypsum Cement Underlayment
03 54 16 - Hydraulic Cement Underlayment
07 92 19 - Acoustical Joint Sealants
09 61 00 - Flooring Treatment
09 61 13 - Slip-Resistant Flooring Treatment
09 61 36 - Static-Resistant Flooring Treatment
09 80 00 - Acoustic Treatment
09 81 00 - Acoustic Insulation
09 97 26 - Cementitious Coatings
09 97 26.13 - Interior Cementitious Coatings