Performance Solutions: Cemrock for Every Home

Stronger, Safer, and More Sustainable MgO Boards for Residential Builds

From moisture-resistant bathrooms to fire-rated walls and durable flooring, Cemrock enhances every space in your home. Discover how our high-performance boards provide long-lasting protection, efficiency, and peace of mind for modern residential construction.

Residential Applications

CEMROCK Extreme logo with stylized eagle design
CEMROCK Floor logo with a stylized red eagle design on the right.

  • Cemrock Floor is a high-quality structural Magnesium Oxide (MgO) board specifically designed for flooring applications over wood or metal framing. Serving as a superior alternative to plywood or OSB, it is fiber-reinforced to enhance strength in building projects while providing a durable, permanent barrier against moisture intrusion. This versatile board is suitable for a wide range of flooring types and exterior decking applications, offering a robust and long-lasting solution.. Its advanced properties ensure reliable performance and protection in demanding environments.

  • Sub-floor

    Suspended Floors

    External Decking

    Floor Underlayment

  • High impact resistance

    Structural Sub-floor

    Non-combustible to ASTM E136

    Environmentally friendly

    Termite resistant and Mold resistant

    Non-toxic and Non-hazardous

3D cutaway view of a two-story house model showcasing structural layout, with visible rooms, roofing, and insulation materials. The interior features a bathtub and wooden framework, while the exterior shows exposed brick and shingle roofing.

  • Cemrock Extreme is a smooth-faced, multi-purpose magnesium oxide (MgO) board engineered for exceptional durability and performance. This non-combustible board is ideal for applications requiring moisture resistance, thermal resistance, and fire protection. Unlike fiber cement boards, Cemrock Extreme offers superior dimensional stability and will not rot, making it a dependable choice for challenging environments.

  • Internal Partitions

    Backer Board for Wet Areas

    Exterior Insulation & Finishing Systems (EIFS/ETICS)

    Exterior Sheathing

    Laminating

    Structural Insulated Panels (SIPs)

    Underlayment

    Fire Rated

    Doors Core

  • Non combustible ASTM E136

    High screw/pull out resistance, no blocking required

    Up to 2 hour fire ratings

    Smooth face: Capable of achieving level 4 finish

    4 layers of high-grade fiber glass mesh for high bending strength and durability

    High impact and racking strength

    Zero chloride content

    Lighter than fiber cement and calcium silicate boards

    Easy to cut, screw and install on steel and timer frames

    Environmentally friendly

Cemrock Lite logo with stylized eagle design

  • Cemrock Lite Board is among the lightest construction boards in its class, offering ease of handling and installation for partition walls and other applications. Its versatility makes it suitable for both interior and exterior use, including as a substrate for stucco and cladding systems in timber and steel frame structures. Fire-resistant, thermal-resistant, moisture-resistant, ESP-bonded, and highly durable, Cemrock Lite is a multi-purpose board suitable for all types of construction projects.

  • EXTERIOR APPLICATIONS

    Cladding System

    Substrate

    Soffits

    Sheathing

    Stucco Substrate

    INTERIOR APPLICATIONS

    Dry lining partition walls

    Tile Backer Board

    Wet-rooms: Tub and

    Shower Surrounds

    Floor Underlayment

    Fire-rated Partitions

  • Light weight multi-purpose board

    Suitable for wet areas

    Non-combustible, Class A1 to EN 13501-1

    Achieves 90min fire rating for external walls

    Achieves 120min fire rating for internal partitions

    Easy to cut, screw and install on steel and timber frames

FAQs

  • Cemrock is a manufacturer of high-performance Magnesium Oxide (MgO) boards designed to provide superior fire resistance, moisture protection, and durability while supporting sustainable construction.

  • • A1 Fire Rated (non-combustible)

    • Moisture and mold resistant

    • Impact and insect resistant

    • Lightweight and easy to install

    • Environmentally friendly (100% recyclable, low carbon manufacturing)

    • Non-toxic, contains no formaldehyde or harmful chemicals

  • Unlike traditional materials such as gypsum, fiber cement, plywood, or OSB, Cemrock boards offer superior fire resistance, moisture protection, durability, and sustainability while remaining lightweight and easy to install.

  • Yes, Cemrock products comply with international standards, including:

    • Fire Resistance: ASTM E84 (zero flame, zero smoke), ASTM E136, EN 13501-1 (A1 classification)

    • Moisture & Mold Resistance: Tested to prevent water absorption, swelling, and mold growth

    • Environmental & Health Certifications: UL GREENGUARD Gold Certified, 100% non-toxic

  • • Cemrock Lite: A lightweight, multi-purpose MgO board for interior and exterior applications, including partitions, tile backers, and stucco substrates.

    • Cemrock Floor: A high-strength structural MgO board designed for sub-flooring, providing impact resistance and moisture protection.

    • Cemrock Extreme: A heavy-duty MgO board for demanding environments, offering exceptional durability, fire resistance, and structural stability.

  • Yes, Cemrock boards are highly resistant to moisture and mold, making them ideal for wet areas such as bathrooms, kitchens, and exterior applications.

  • Interior partitions & non-load-bearing walls

    • Exterior cladding & sheathing

    • Wet areas (bathrooms, kitchens, showers)

    • Fire-rated partitions & ceilings

    • Sub-flooring & decking

    • Structural insulated panels (SIPs)

  • Yes, Cemrock boards are lightweight and can be easily cut, screwed, and installed using standard tools. They also reduce labor time and costs compared to heavier traditional materials.

  • Yes, Cemrock products integrate seamlessly with wood and steel framing, gypsum boards, OSB, fiber cement, and other standard construction materials.

  • They can be installed using standard screws, nails, or adhesives, depending on the application. Refer to installation guide in technical library.

  • Yes, Cemrock products are made with a low-carbon manufacturing process, are 100% recyclable, and do not contain harmful chemicals like formaldehyde or fly ash.

  • No, Cemrock boards are UL GREENGUARD Gold Certified, meaning they do not release volatile organic compounds (VOCs) and are safe for indoor environments.

  • • Carbon-neutral manufacturing process

    • No toxic emissions or carcinogenic dust

    • Supports LEED, WELL, and BREEAM certifications

    • Reduces construction waste

  • For sales inquiries and bulk orders, contact Cemrock at sales@cemrock.us or call +1-844-823-6762.