3mm to 6mm Sanded Mgo board used for HPL /PVC Lamination

 Using 3mm to 6mm Sanded MgO Boards as a substrate for HPL or PVC lamination represents a highly specialized, precision-driven segment of the building materials industry. Thin MgO boards (3mm, 4mm,5mm and 6mm) laminated with a decorative face are the gold standard for lightweight marine partitions, high-end RV interiors, cleanroom ceiling tiles, fire-rated wall panels, and commercial cabinetry cladding.

However, laminating on thin sheets introduces unique structural and manufacturing challenges that do not exist with thicker (9mm-12mm) boards. Below is the technical breakdown and production logic required to successfully process 3mm to 6mm sanded MgO boards for lamination.

Application Breakdown by Thickness

• 3mm to 4mm Sanded MgO:
  • Primary Use: PVC foil lamination or very thin micro-HPL overlays.
  • Applications: Lightweight ceiling tiles (e.g., sag-free cleanroom ceilings), internal linings for cruise ships, trains, and recreational vehicles (RVs) where every kilogram matters.
  • Key Characteristic: Highly flexible, requiring delicate handling on automated conveyor lines to prevent snapping before lamination.
• 5mm to 6mm Sanded MgO:
• Primary Use: Standard HPL lamination (0.5mm- 1.0mm face thickness).
• Applications: Modular cleanroom wall linings, hospital wall cladding panels, flush fireproof door skins, and architectural column covers.
• Key Characteristic: Provides excellent impact resistance and structural rigidity while maintaining a slim profile that mounts flush with standard architectural framing tracking.

More information, please visit at www.hocre-board.com or send message by whatsapp +86 15001321220

Sanded MgO Board vs Fiber Cement Board

 

When deciding between Sanded MgO (Magnesium Oxide) Board and Fiber Cement Board (FCB) for high-performance building projects, the choice often comes down to the specific technical demands of the application. While both are excellent non-combustible alternatives to drywall and plywood, they behave very differently under the drill, in humid environments, and during installation

Dimensional Accuracy & Surface Finish

• Sanded MgO Board: The defining feature of a sanded MgO board is that it undergoes mechanical wide-belt calibration. This eliminates the rough "screen layer" or mold imperfections on the back side. It delivers an ultra-precise thickness tolerance (typically +/-0.2mm) and a perfectly level, micro-roughened surface. This makes it the superior choice for lamination (HPL, PVC, veneers) and acoustic subflooring where gaps cannot be tolerated.
• Fiber Cement Board: FCB is typically pressed and cured (often autoclaved). While smooth on one side, it lacks the precise, calibrated thickness uniformity of a sanded MgO board. Thickness variances are generally wider, which can create minor lippage or uneven joints when boards are butt-together in subflooring or seamless wall applications.

2. Chemical Composition & Corrosion Risks

• Sanded MgO Board (Sulfate-based): High-quality modern MgO boards utilize Magnesium Sulfate (MgSO4) instead of Magnesium Chloride (MgCl2).
• The Advantage: Sulfate-based boards are 100% chloride-free, meaning they do not suffer from the "sweating/crying" phenomenon in humid climates, and they will not corrode steel studs, mesh, or structural metal fasteners (such as SUS 316 anchors).
• Fiber Cement Board: Made of Portland cement, cellulose fibers, sand, and water. It is chemically stable and inert, posing zero risk of metal corrosion. However, it contains crystalline silica, which poses health hazards (silicosis) during dry cutting on-site.

3. Workability, Installation, and On-Site Handling

• Sanded MgO Board: Despite its high structural density, MgO is surprisingly resilient and "elastic" compared to cement. It is significantly easier to drill, score, and screw close to the edge without cracking or blowout. This makes it highly efficient for framing trials and fast on-site installation. It is also generally lighter than fiber cement of the same thickness.
• Fiber Cement Board: FCB is dense, rigid, and brittle. It requires specialized carbide-tipped or diamond blades to cut, generating heavy dust. Fastening requires pre-drilling or specific high-torque self-tapping screws; attempting to drive screws near the edge without pre-drilling frequently results in corner cracking or fracturing.

4. Moisture Performance & Structural Integrity

• Sanded MgO Board: Does not absorb moisture easily, and even if saturated, it retains its dimensional stability and nearly 100% of its structural flexural strength once dried. It does not swell or delaminate, making it ideal for high-humidity interiors or as a resilient rainscreen backing.
• Fiber Cement Board: Highly water-resistant and will not rot. However, it has a higher rate of hydrothermal movement (expansion and contraction due to temperature and moisture changes). If used outdoors or in wet areas, strict expansion joint spacing must be followed to prevent buckled joints or cracked tiles.

·        Technical Comparison

Feature / Property	Sanded MgO Board (MgSO4​)	Fiber Cement Board (FCB)
Thickness Tolerance	Excellent (+/-0.2 mm) — Calibrated and sanded	Moderate — Subject to standard manufacturing variance
Primary Structural Best Use	Lamination cores (SIPs), High-end Subflooring, Fire-rated ceilings	Exterior siding, Tile backer, Heavy-duty industrial cladding
Workability	Easy to cut, score, drill, and screw without pre-drilling	Hard/brittle; requires specialized blades and pre-drilling
Health & Safety	Silica-free, non-toxic dust	Contains Crystalline Silica (requires strict dust control)
Corrosion Risk	Zero (Assuming Premium Sulfate/Chloride-free)	Zero
Weight & Density	Lighter weight per volume; high strength-to-weight ratio	Heavier, denser, and more rigid

 

 

Summary Verdict

• Choose Sanded MgO Board if: Your project involves secondary lamination (SIPs, cleanroom panels, firedoors), requires a perfectly flat subflooring base with tight thickness tolerances, or is located in a highly humid environment where ease of installation and tool-wear savings are priorities.
• Choose Fiber Cement Board if: You are installing standard lap siding or budget-conscious exterior cladding where precision thickness calibration is secondary to raw, cementitious mass and weather weathering history.

 More information, please visit at www.hocre-board.com or send message by whatsapp +86 15001321220

High Moisture Resistant Modified Magnesium Oxide Board

 Modified Magnesium Oxide (MgO) boards are specialized building materials engineered to overcome the historical weaknesses of standard MgO panels—specifically "crying" (leaching moisture) and salt-related corrosion. High moisture resistant versions typically utilize a Magnesium Sulfate (MgSO4) chemistry rather than the traditional Magnesium Chloride (MgCl2).

The Chemistry: Sulfate vs. Chloride

The primary factor in moisture resistance is the bonding salt used during the manufacturing process.

• Standard MgO (Chloride): Highly hygroscopic. In humid environments, chloride ions can absorb atmospheric moisture, leading to "sweat" on the board surface. This moisture is often acidic and can corrode metal studs, screws, and fixings.
• Modified MgO (Sulfate): By replacing chloride with sulfate, the board becomes much more stable in high-humidity zones. It does not absorb water from the air, effectively eliminating the risk of leaching and metal corrosion.

 

Key Performance Characteristics

High-quality modified MgO boards are designed for harsh environments like tunnels, coastal areas, and exterior facades.

Feature	Performance Specification
Fire Rating	Non-combustible, often achieving Class A1 (EN 13501-1).
Moisture Stability	Minimal linear expansion even when fully saturated.
Durability	Resistant to mold, mildew, and termites; does not rot or disintegrate.
Mechanical Strength	High flexural strength; suitable for high-impact zones.
Eco-Friendly	Low carbon footprint; typically free of asbestos, formaldehyde, and silica.

 More information, Please visit at www.hocre-board.com or send message by whatsapp +86 1501321220

Through-Color Fiber Cement Panels with Fine Sanding Lines

 What are Through-Color Fiber Cement Panels?

Unlike standard fiber cement boards that are surface-painted, through-color fiber cement (also known as integrally colored) features pigments that are blended into the raw materials during the manufacturing process.

The Advantage of Integral Pigmentation

• Seamless Edges: When the panel is cut on-site, the color of the core matches the surface. This eliminates the need for edge painting and hides the visibility of minor chips or scratches.
• Long-Lasting Vibrancy: Because the color is not just a skin, it resists fading and peeling even under intense UV exposure.

The Beauty of Fine Sanding Lines

The fine sanding line finish (often called a brushed or striated texture) is a mechanical treatment that adds delicate, linear grooves to the surface of the panel.

1. Interplay of Light and Shadow

The fine grooves react dynamically to natural light. As the sun moves throughout the day, the texture creates subtle shadows, giving the building a "living" facade that changes appearance depending on the angle of observation.

2. Sophisticated Matte Aesthetic

The sanding process reduces glare, providing a refined matte finish that fits perfectly with minimalist and industrial architectural styles.

3. Masking Surface Imperfections

While a perfectly smooth panel might highlight dust or slight impact marks, the fine sanding lines naturally conceal minor surface wear, maintaining a "new" look for longer.

 

More information, please visit at www.hocre-board.com or send message by whatsapp +86 15001321220

Mgo board flat roofing sheet

 In a flat roofing system, MgO (Magnesium Oxide) boards act as a high-performance structural substrate or cover board. They are increasingly replacing traditional OSB (Oriented Strand Board), plywood, or gypsum-based boards due to their superior fire rating and moisture resistance.

Here is the technical breakdown of using MgO boards for flat roofing：

1. The Core Functional Role

In a flat roof assembly, the MgO board is typically installed over the metal or wood framing to provide a solid, flat surface for the waterproof membrane.

• A1 Fire Rating: Essential for commercial projects with strict fire codes. It acts as a fire barrier between the building interior and the external roofing membrane.
• Compression Strength: It provides a rigid base that protects the insulation layer from being crushed by foot traffic during maintenance.
• Dimensional Stability: Unlike wood-based sheets, MgO boards exhibit minimal expansion or contraction (low linear thermal expansion), which prevents the waterproof membrane from tearing at the joints.

2. Critical Specification: Sulfate-based vs. Chloride-based

For flat roofing, Sulfate-bonded MgO boards (Magnesium Sulfate) are the industry standard for high-end or industrial projects.

• The Corrosion Risk: Standard "Chloride" MgO boards can "sweat" (release salty moisture) in high-humidity roof cavities. This moisture is highly corrosive to the metal screws (fasteners), steel joists, and aluminized steel frames typically found in flat roof assemblies.
• The Sulfate Advantage: Sulfate boards are "chloride-free," meaning they will not cause the fasteners to rust or the structural steel to corrode over time.

3. Common Technical Specifications

Feature	Typical Requirement for Flat Roofs
Common Thickness	12mm, 15mm, or 18mm (depending on span and load)
Edge Profile	Square Edge (for standard layouts) or Tongue & Groove (T&G) (to prevent vertical displacement between boards)
Density	High Density (> 1,000 kg/m³) is preferred for structural strength
Flexural Strength	Must meet local building codes for roof loading (wind uplift and live load)

 

More information, please visit at www.hocre-board.com or send message by whatsapp +86 15001321220

Mgo board outdoor application

 Magnesium Oxide (MgO) board is highly effective for outdoor applications, provided it is used correctly—primarily as a substrate rather than a finished exterior surface. While it is naturally moisture-resistant and non-combustible, it is not "waterproof" in the sense of being a final weather barrier.

 Primary Outdoor Uses

• Wall Sheathing: As a direct replacement for plywood or OSB, providing superior fire resistance and mold protection.
• Soffits and Fascia: Excellent for these areas due to its resistance to rot and high humidity.
• Roof Decking: Used as a fire-rated base layer under roofing materials.

Choosing the Right Board

• Sulfate vs. Chloride: For outdoor use, Magnesium Sulfate (MgSO₄) boards are generally preferred. They are significantly less prone to "sweating" (leaching salt/moisture) and are less corrosive to metal fasteners than standard Chloride-based boards.
• Density: Ensure you are using a high-density "Exterior Grade" board, which typically has lower water absorption rates.

Pros & Cons for Exterior Use

Feature	Benefit for Outdoors
Fire Rating	Class A1 Non-combustible; ideal for wildfire-prone areas.
Mold/Pests	Inorganic and high pH; will not support mold or attract termites.
Dimensional Stability	Does not warp or swell like wood-based products when damp.
Freeze-Thaw	Performs well in extreme temperature shifts without cracking.

More information, please visit at www.hocre-board.com or send message by whatsApp +86 15001321220

What is Fiber Cement Flat Roofing?

 Fiber cement Board  is a composite material made of Portland cement, cellulose fibers, and mineral fillers. When manufactured as a flat roofing sheet, it undergoes a high-pressure steaming process (autoclaving) that results in a material with remarkable dimensional stability and strength.

1. Unmatched Fire Safety (A1 Fire Rated)

For high-rise developments and industrial hubs, fire compliance is non-negotiable. Most premium fiber cement sheets are A1 or A2-s1, d0 non-combustible, providing an essential safety barrier that traditional bitumen or plastic-based roofing cannot match.

2. Superior Moisture and Corrosion Resistance

Unlike metal roofing, fiber cement does not rust or corrode in coastal or high-humidity environments. Furthermore, high-quality boards are engineered to prevent "sweating" or leaching, ensuring the sub-assembly remains dry and mold-free.

3. Low Thermal Expansion

One of the biggest challenges in roofing is the expansion and contraction caused by temperature swings. Fiber cement flat sheets have a very low coefficient of thermal expansion, which reduces the stress on screws, anchors, and frame systems.

Technical Data Sheet (TDS):

Density: ≥1.2g/cm3 for high-impact resistance.

• Modulus of Rupture (MOR): Class 4 or 5 according to EN 12467 standards.
• Water Impermeability: No water drops on the reverse side after 24 hours.
• Surface Finish: Options include through-colored, UV-resistant coatings, or natural grey for industrial aesthetics.

More information, please visit at www.hocre-board.com or send message by whatsapp +86 15001321220