Board · 3.2–6.4 mm
Timber-Based Composite — indicative fig. C·48
Fire Combustible CombustibleEmbodied carbon -0.50kgCO₂e/kg Stores carbonCompressive 30-50MPa StructuralDesign life 20yr
Thin, very dense compressed wood-fibre sheets (3.2–6.4 mm) offering a hard smooth face, good bending strength, and very low cost — restricted to dry interior use due to acute moisture sensitivity.
01 Physical
Density 1050kg/m3
Specific gravity 1.05
Porosity 2-5%
Water absorption 20-35% thickness swell
Hardness 35-50MPa (Brinell)
UV resistance Poor
Chemical resistance Low-Moderate
pH tolerance 5-8pH
Surface roughness 1-3μm Ra
02 Mechanical
Tensile strength 20-35MPa
Compressive strength 30-50MPa
Flexural strength 40MPa
Shear strength 1.2 (IB); 8-12 (in-plane)MPa
Poisson's ratio 0.3
Impact resistance 4500J/m³
Creep resistance Low-Moderate
03 Thermal
Thermal conductivity 0.18W/mK
Specific heat 1300J/kgK
Thermal expansion 6-10×10⁻⁶/K
04 Compliance & Fire First question
Combustibility class Combustible — NCC Group 3
Fire resistance level None (not rated)minutes
Ignition temp 250-280°C
Flame spread index 6-9FSI
Smoke dev. index 3-5SDI
Heat release rate 150-220kW/m²
05 Sustainability & Health
Embodied carbon -0.5 to 0.3kgCO2e/kg
Carbon footprint -1.7 to 1.0kgCO2e/m²
Embodied energy 10-18MJ/kg
Water footprint 15-40L/kg
Recyclability 20-40%
Recycled content 0-20%
Renewable content 85-98%
Circular score 4/10
VOC emissions <0.05-0.5mg/L (formaldehyde)
Toxicity rating Low (in service); Moderate (machining dust)
LEED contribution MR + IEQ credits (product-specific)
06 Durability · Cost · Logistics
Expected lifespan 20-40years
Maintenance interval 5-10years
Warranty period 2-5years
Material cost (range) 3-8AUD/m²
Material cost (per unit) 8-25AUD/sheet (2440x1220mm)
Lead time 0-3days
Lifecycle cost 25-60AUD/m²
Annual maintenance 1-3AUD/m²/year
Market availability Excellent
07 Assessment
Advantages
- Exceptionally low material cost — AUD 3–8/m2
- Very high density (1050 kg/m3) gives a hard, resistant face surface
- Smooth, uniform face ideal for painting, laminating, and coating
- Good in-plane bending strength (MOR 40 MPa standard; 50–60 MPa tempered)
- Uniform thickness and consistent properties throughout sheet
- Excellent substrate for adhesive bonding and decorative overlay
- No grain direction — isotropic in-plane performance
- Available in perforated (pegboard) form for display and storage
- Tempered grades offer improved surface hardness and abrasion resistance
- Lightweight for its strength — 3.3 kg/m2 at 3.2 mm
Constraints
- Extreme moisture sensitivity — thickness swelling 20–40% on immersion
- Permanent deformation after wetting; does not recover on drying
- Poor edge screw-holding capacity
- Edges must be sealed on all sides for moisture protection
- Fully combustible — not suitable for fire-rated assemblies
- Poor UV resistance — degrades and discolours without protective coating
- Very thin range (3.2–6.4 mm) limits structural and spanning applications
- Fine machining dust is a respiratory hazard (wood fibre, IARC Group 1 for hardwood dust)
- Formaldehyde emissions possible from resin-bonded (dry-process) grades
- Poor freeze-thaw resistance — exterior use requires full encapsulation
08 Applications
A1 Furniture and cabinet backing boards Backs for wardrobes, bookshelves, display cabinets, and flat-pack RTA furniture — the single largest use of hardboard in Australia
A2 Door skins Face veneer substrate on hollow-core flush doors and lightweight interior door constructions
A3 Flooring underlay Levelling layer beneath sheet vinyl, carpet, and resilient flooring on timber subfloors — provides smooth, hard surface
A4 Interior wall panelling Substrate and backing for decorative wall panel systems; grooved and prefinished panelling products
A5 Perforated pegboard panels Tool storage, retail display, and workshop organisation systems — standard hole pattern 6 mm at 25 mm or 19 mm centres
A6 Concrete formwork lining Expendable smooth-face liner for concrete form panels where surface finish is critical and low cost is prioritised
A7 Exhibition and display construction Lightweight panels for temporary retail, trade show, and museum display structures
A8 Craft and model-making substrate Painting substrates, model bases, hobby and theatrical set applications
A9 Drawer bottoms Traditional application in furniture-making — hardboard drawer bases where MDF is now also used
A10 Tempered hardboard floor panels Tempered grade used as protective overlay in construction sites to protect finished floors from foot traffic
09 Sources & Standards
Sources pending — citations for this material are not yet recorded. Verify all figures against manufacturer data and current standards before specifying.