Materials & comparisons
MDF or solid timber for built-in joinery?
For painted fitted work, the 'cheaper' material is often the technically better one.
There is a persistent assumption that solid timber is always the premium option. For painted, fitted joinery it frequently is not. MDF is dimensionally stable, has no grain to raise through paint, and takes a machined profile cleanly — which is exactly what you want in an alcove unit that must stay flat and look seamless. Solid timber earns its place where the grain will be seen, where the section is structural, or where the piece will be handled hard.
Where MDF is the right call
Painted door fronts, alcove shelving, panelled backs, media wall carcassing and shaker-style frames all benefit from a material that will not move seasonally or telegraph grain through the finish. Cut edges seal and sand to a finish solid timber cannot match under paint.
Where solid timber wins
Anything stained or oiled, anything taking a screw repeatedly, worktops and shelf edges that will be knocked, and structural members in a frame. Solid timber also holds a crisp arris on a heavily used edge far better over time.
Moisture is the deciding factor in wet rooms
Standard MDF and water do not mix — it swells at the edges and does not recover. In bathrooms, utility rooms and boot rooms, moisture-resistant board or solid timber is the correct specification, with every cut edge sealed.
Weight, spans and shelving
MDF sags over a long unsupported span more readily than a good hardwood of the same thickness. For book shelving, either increase the thickness, add a front edge stiffener, or reduce the span with a central support. This is the most common cause of disappointing bespoke shelving.
Questions we're asked about this
Planning fitted storage or a media wall?
We'll spec the material to the room and the use rather than to a default — tell us the space and what it needs to hold.
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