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What is the difference between MDF and particle board?

MDF (Medium Density Fibreboard): made from wood fibres broken down to individual fibres and reformed under heat and pressure with adhesive; produces a smooth, homogeneous panel with uniform properties throughout; density 600–900 kg/m³; excellent machining, painting, and veneer bonding; higher cost. Particle board: made from wood chips (larger pieces) bonded with adhesive; coarser structure, lower density (500–700 kg/m³), rougher surface requiring laminate facing; lower cost; lower screw-holding than MDF; more economical for applications where surface will be fully covered. MDF is preferred for painted and routed furniture; particle board for laminated flat-pack and budget applications.

Can MDF be used in bathrooms?

Standard MDF: absolutely not – standard MDF swells 15–25% in thickness when exposed to bathroom humidity, causing complete delamination and structural failure within 6–18 months. MR-MDF (green MDF, IS 12406 MR grade): can be used for bathroom vanity carcasses and cabinet boxes in covered/enclosed bathroom furniture – it resists humidity and intermittent condensation but must not be directly splashed. For splash areas, tile surrounds, and surfaces directly contacted by water: use cement board, marine plywood (BWP), or PVC-based materials. All MDF edges in bathrooms must be fully sealed with PVC edge banding – unsealed MDF edges wick moisture regardless of the board's MR rating.

What density MDF should I specify for kitchen cabinets?

For kitchen cabinet carcasses (base and wall units): specify minimum 700 kg/m³ MR-MDF – this density provides adequate screw-holding for Blum/Hettich hinge screws (minimum 450N withdrawal force) and standard drawer runner fixings. Premium modular kitchen manufacturers specify 720–760 kg/m³ for maximum hardware reliability over 10+ year warranty periods. Avoid 'light MDF' at below 600 kg/m³ for any structural furniture application – it is designed for packaging and display, not furniture with load-bearing hardware. Always specify density in kg/m³ in the purchase order – 'heavy duty MDF' or 'premium MDF' are marketing terms, not engineering specifications.

What is the standard size of MDF and particle board sheets in India?

Standard sheet sizes: 8*4 feet (2440*1220mm) – most common for furniture manufacturing. 7*4 feet: available from some manufacturers for specific cutting optimisation. 6*8 feet (1830*2440mm) and 5*8 feet: available for specific commercial applications. Thickness range: MDF: 3, 4, 6, 9, 12, 15, 18, 19, 22, 25, 32mm standard; 40mm from select manufacturers. Particle board: 8, 9, 12, 15, 16, 18, 19, 22, 25mm standard. Custom sizes are generally not available from standard production runs – purchasing standard sheets and converting to required sizes through cutting is the standard practice.

How many times can MDF be screwed and unscrewed?

MDF has limited screw re-fastening capability compared to solid wood or plywood: a wood screw can be removed and re-inserted approximately 3–5 times before the hole enlarges beyond reliable grip. To maximise MDF fastening reliability: pre-drill pilot holes (reduces fibre splitting), use hardened MDF/chipboard screws (coarser thread pitch designed for MDF), apply wood glue to screw threads for critical joints, use Euroscrew (confirmat) or cam-lock fasteners for knockdown furniture (designed specifically for MDF/particle board). For joints requiring regular disassembly: use threaded barrel nuts or T-nuts for reliable repeated fixing.