Grip-Rite MORE^™ Backer Board and Underlayment is an innovative and versatile product designed to excel in the toughest conditions. It is 28% lighter*, on average, than leading portland cement backer boards. Use as a direct replacement for fiber cement, gypsum boards, OSB, plywood, and gypcrete products.

Free from VOCs, quartz silica dust, and other harmful chemicals, the eco-friendly formulation of Grip-Rite MORE is future-focused and aligns with current safety and environmental standards. This magnesium oxysulfate cement board (MgO) has enhanced flexural strength and impact resistance for a more durable and resilient tile underlayment solution. It cuts quickly without the use of power tools and is compatible with Pro-Twist Cement Board Screws (CB158) for secure installation. 

MgO backer board is water-resistant and won't develop mold or mildew after prolonged exposure. Grip-Rite MORE has a Class A Fire Rating (ASTM E84) and sound-dampening qualities. Unlike foam-based cement boards, pests cannot penetrate and won't damage your project.  Revolutionize your residential and commercial building projects by embracing our premium tile backer board and underlayment.

Grip-Rite commits to compliance with international building codes and standards. Our portland cement alternative solution was evaluated by ICC-ES testing protocols. Click for more information and a full report ICC-ESR 5637.

Features

• No Gypsum Cement Required – Installs directly over OSB or plywood, cutting installation time, cost, and drying delays
• Sound Compliant - Achieves STC and IIC requirements without the need for sound mats
• Fire-Rated Performance - Approved for UL L528 1-hour fire-rated assemblies, ASTM E84 - Flame Spread Index of 0 and Smoke Developed Index of 0
• Ideal for Conventional Wood Framing and Multifamily Projects - Designed to perform optimally in conventional wood-framed constructions
• Lightweight - 28% lighter, on average, than the leading portland cement backer board
• Eco-Friendly - Free from VOCs, quartz silica, and other harmful chemicals
• Water Resistant - Resists damage and mold growth from long term water exposure
• Durable - High flexural and impact strength
• Code Compliant - 2021, 2018, 2015 IBC (International Building Council) & IRC (International Residential Code)