MDF vs Plywood: Which Board Should You Use?

MDF and plywood are the two most-used sheet materials on site — but they behave very differently. This guide explains the practical differences so you can pick the right board for the job.

What is MDF?

MDF (medium-density fibreboard) is an engineered board made from fine wood fibres compressed with resin. It has a smooth, uniform surface with no grain or knots, cuts cleanly and machines beautifully — which makes it the default for painted finishes, furniture, mouldings and shopfitting. Browse the MDF range, including Standard MDF, Moisture Resistant MDF and Flame Retardant (Class O) MDF.

What is plywood?

Plywood is built from thin wood veneers glued in cross-laminated layers, giving it strength in both directions and far better resistance to bending and impact. It holds screws better, is lighter for its strength, and many grades are rated structural. See the Plywood range.

Head to head

Strength: Plywood wins — it is stronger, stiffer and the choice for anything load-bearing or structural. MDF is not a structural board.

Finish: MDF wins for painted and detailed work — its smooth, grain-free face takes paint and routed profiles perfectly. Plywood shows its grain and layers.

Moisture: Standard MDF swells if it gets wet; use Moisture Resistant MDF or marine/exterior plywood in damp areas.

Screw holding & edges: Plywood holds fixings near edges better; MDF can split at the edge and needs care.

Weight & cost: MDF is heavier and usually cheaper; plywood is lighter for its strength and typically dearer.

Quick rule of thumb

Choose MDF for painted joinery, furniture carcassing, shopfitting and mouldings. Choose plywood for flooring, shuttering, structural work, anything weight-bearing, and damp or exterior locations. For fire-rated jobs, both come in Class O versions.

Buying by the pallet

All Sheets delivers MDF and plywood at trade prices by the pallet across London and the South East. Compare the MDF and Plywood ranges, or get in touch for a quote.