Exterior MgO Cement Board
Exterior MgO cement board uses EPS particles instead of wood chips, which makes it lighter, with a lower density. It performs better in fire retardance and sound and heat insulation, and with our waterproofing technology it can be used as exterior underlayment. Smooth and tile-key back faces are available.
- Thickness
- 8–12 mm
- Density
- ≥ 0.9 t/m³
- Fire rating
- A1, flame spread 0
- Freeze–thaw
- 100 cycles (EN 520)
- Fire resistance
- Heat resistance
- Moisture resistance
- Impact resistance
- Building safe
- Insect resistance
- Mould resistance
- Health safe
Overview
Exterior MgO cement board is a waterproofed magnesium oxide board with EPS particles, used as a backer for render (EIFS/ETICS), brick veneer, curtain walls, aluminium composite panels and tile. Jiafeng makes it 8–12 mm thick in 1220 × 2440/2700/3000 mm, density ≥ 0.9 t/m³, A1 non-combustible, 100 freeze–thaw cycles (EN 520).
Specifications
Values as published by Jiafeng. Custom thicknesses, sizes and edges on request.
Technical data
| Item | Parameter |
|---|---|
| Composition | MgO + MgSO4 + glass fibre + EPS particles |
| Colour | Grey; custom colours |
| Surface texture | Smooth and textured |
| Size | 1220 × 2440, 1220 × 2700, 1220 × 3000 mm |
| Thickness | 8–12 mm |
| Edges | Square |
| Density | ≥ 0.9 t/m³ |
| Combustibility / fire rating | Non-combustible / A1 |
| Moisture content at delivery | ≤ 12% |
| Moisture absorption | 20% maximum saturation (slow absorption rate) |
| Maximum service temperature | 1200 °C |
| Bending strength | ≥ 15–20 MPa |
| Impact strength | > 9 kJ/m² |
| Dry shrinkage | ≤ 0.3% |
| Wet expansion rate | ≤ 0.3% |
| Thermal conductivity | ~0.44 W/m·K |
| Thermal expansion (+20 °C to −20 °C) | 0.01 mm/m·°C |
| Surface alkalinity | pH 8–10 |
| Freeze–thaw (UNI EN 520) | 100 cycles without notable effects |
| Asbestos analysis | Absent – not measurable |
| Fire class | Flame spread index 0, smoke developed index 0, non-combustible |
| Formaldehyde analysis | Absent – not measurable |
| TVOC (ASTM D5116-10) | Below measurable levels |
| Chloride ion content (ASTM C871-11) | 0.01% |
Accessories for exterior walls
| Framing | Steel frame or wood frame |
|---|---|
| Fixing | Self-drilling screws |
| Joints | Self-adhesive mesh tape; flexible jointing compound (e.g. Sika, Knauf grey) |
| Wall build-up | Drained cavity battens, wall wrap, insulation, mortar, mesh, waterproof primer |
Features
- Smooth or tile-key backBoth a smooth face and a tile-key back are available.
- Lighter and lower densityEPS particles replace wood chips, for better fire retardance and sound and heat insulation.
- Waterproofed for exterior useOur waterproofing technology makes the board suitable as exterior underlayment.
- Weather tested100 freeze–thaw cycles (UNI EN 520) without notable effects; maximum service temperature 1200 °C.
Applications
- EIFS and stucco board
- ETICS backer board
- Backer for brick veneer
- Backer for curtain walls
- Backer for aluminium composite panels
- Tile backer board
- Fire-resistant exterior envelope systems
Often specified together
Structural MgO Sheathing
12, 15 mm11,300 kPa
Compressed magnesium oxysulfate sheathing with OSB-like screw holding, 12 and 15 mm.
View product
Lightweight EPS MgO Board
3–25 mm600–800 kg/m³
EPS particles instead of wood chips for 600–800 kg/m³ density; waterproofed for exterior underlay.
View productFurther reading
Tell us about your project
Send the board type, thickness, size and quantity. We reply with a quotation, loading plan and lead time — usually within 2 hours on working days.
- Your requirementsProduct, thickness, size, edges and the application.
- Quotation and samplesPrice per sheet and per container, and samples for testing.
- Production and shippingTested in our laboratory, packed on pallets, shipped from Shanghai or Ningbo.
Request a quotation
We use your details only to answer your inquiry. See our privacy policy.