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Which material should I use?
Choose plywood for strength, shelves, cabinet carcasses, screw holding and projects where moisture may be a concern. Choose MDF for painted furniture, cabinet doors, routed designs and projects where a smooth finish and lower cost matter most.
For many furniture and cabinet projects, the best solution is to use both. Plywood works well for structural parts such as carcasses and shelves, while MDF is often better for painted doors and decorative panels.
Neither material is automatically suitable outdoors. Plywood and MDF are available in different grades, so always choose a board specifically rated for the conditions in which it will be used.
Comparison table.
| What are you making? | Better choice | Why? |
|---|---|---|
| Cabinet carcasses | Plywood | Strong, lighter and holds fixings well |
| Painted cabinet doors | MDF | Smooth surface and clean routed profiles |
| Heavy bookshelves | Plywood | Stiffer over longer spans |
| Short painted shelves | MDF | Smooth and economical when well supported |
| Painted furniture | MDF | No grain to show through the finish |
| Clear-finished furniture | Plywood | Real wood veneer can remain visible |
| Routed/Shaker panels | MDF | Consistent material machines cleanly |
| Furniture with frequent screw fixing | Plywood | Better fixing strength, particularly near edges |
| Damp interior areas | Grade dependent | Use suitable MR MDF or appropriate plywood |
| Exterior projects | Exterior-rated plywood or exterior MDF | Standard boards are not designed for outdoor exposure |
| Lower-cost indoor projects | MDF | Usually cheaper than furniture-grade plywood |
| Lower-weight construction | Plywood | Usually lighter at an equivalent thickness |
In simple terms: use plywood when the board needs to work hard; use MDF when the surface needs to look smooth.
The basics.
Plywood is an engineered wood panel made from thin layers of real wood veneer bonded together. The grain direction normally alternates between layers, creating the cross-layered structure responsible for much of plywood's strength and stiffness.
Different wood species, veneer grades, adhesives and panel specifications produce plywood for different purposes, from furniture and cabinets to structural and exterior applications.
This variation matters when comparing plywood with MDF because the performance of low-grade interior plywood can be very different from high-quality birch or exterior-rated plywood.
Cabinet boxes or doors?
For cabinet carcasses, plywood is usually the better choice. For painted cabinet doors and decorative panels, MDF is often better.
Plywood's strength-to-weight ratio and fixing performance make it well suited to cabinet sides, bases, shelves and drawer boxes. MDF is heavier, but its smooth, uniform surface makes it excellent for painted doors and panels.
For painted kitchens and fitted furniture, combining the two can give a better result than choosing one material throughout: plywood for structural components and MDF for the visible painted parts.
For heavy loads or longer shelf spans, choose plywood. For shorter, well-supported painted shelves, MDF can work very well.
Plywood is generally stiffer for its weight, so it is less prone to sagging across longer unsupported spans. This makes it a strong choice for bookshelves, kitchen storage and shelving carrying heavier objects.
MDF can still be used successfully for shelving, particularly in wardrobes and fitted furniture, but shelf thickness, span and support become more important as the load increases.
MDF is usually the better choice when the finished surface will be painted.
Its smooth, grain-free face creates an even finish and is one reason MDF is widely used for painted wardrobes, cabinet doors, wall panelling and fitted furniture.
The cut edges are more absorbent than the face, so they should be sanded and sealed before painting. Plywood can also be painted, but its grain and veneer joints can require more preparation when a completely smooth finish is wanted.
For projects where water exposure is possible, the exact board grade matters more than simply choosing MDF or plywood.
Standard MDF can swell if water enters the board, particularly through unfinished edges. Moisture-resistant MDF is designed for humid interior environments such as kitchens and bathrooms, but this does not automatically make it suitable outdoors.
Plywood also varies by specification. Some products are intended only for dry indoor use, while others are manufactured for humid or exterior conditions. For outdoor work, choose plywood or specialist MDF specifically rated for exterior use.
For routed profiles, grooves and decorative details, MDF is normally easier to work with.
Its uniform structure has no grain direction or veneer layers, allowing CNC machines and routers to produce consistent profiles. This makes MDF particularly useful for Shaker doors, mouldings and decorative furniture panels.
Plywood can also be accurately machined, but the face veneer is more likely to chip or splinter if unsuitable cutting tools or techniques are used.
If you want to see natural wood grain, choose plywood.
Good-quality furniture plywood has a real wood veneer that can be stained, lacquered, oiled or clear coated. Its layered edge can also be left visible as part of the design.
MDF has no natural grain, so raw MDF is normally painted or covered with veneer or another decorative surface rather than stained.
MDF stands for Medium Density Fibreboard. It is made from refined wood fibres combined with resin and pressed into dense, uniform sheets.
Unlike plywood, MDF has no layers or natural grain. Its consistent structure gives it a very smooth face and makes it particularly easy to cut, route and paint.
Different MDF grades are available for different uses, including standard, moisture-resistant, fire-retardant and specialist exterior boards.
Choose plywood when you need:
Consider MDF instead when: the project is primarily decorative, will be painted, needs detailed routing or cost is more important than maximum strength.
Choose MDF when you need:
Consider plywood instead when: the component carries heavy loads, spans longer distances, needs strong edge fixings or benefits from being lighter.
MDF is usually cheaper, while plywood is usually lighter for a comparable thickness.
The exact price depends on the grade. Standard MDF can be substantially cheaper than high-quality birch plywood, while specialist moisture-resistant or exterior MDF costs more than standard board.
Price should therefore be considered alongside performance. Using cheaper MDF for a heavily loaded shelf may not be good value if additional support is then required. Equally, using premium plywood for a painted decorative panel can add cost without giving the finished project much benefit.
Both materials produce wood dust when cut, routed or sanded, so use effective dust extraction and suitable respiratory protection when machining them.
MDF creates particularly fine dust because of its fibre structure. Clean machining, good extraction and having panels cut accurately before assembly can significantly reduce unnecessary dust and finishing work.
Cworkshop can supply MDF and plywood cut to size, with CNC machining, drilling and other panel-processing services available for suitable boards.
Use plywood for cabinet carcasses, heavy shelves, structural furniture, strong fixings and projects where a natural wood finish is wanted.
Use MDF for painted doors, wardrobes, routed panels, wall panelling and furniture where a smooth painted finish is more important than maximum strength.
If your project contains both structural and decorative parts, you do not have to choose one material for the whole build. Often the best specification is plywood where you need strength and MDF where you need a smooth finish.
Before ordering, answer four questions: How much weight will it carry? Will it encounter moisture? Will it be painted or left visible? How will it be fixed together? Those answers normally make the choice straightforward.
Plywood is generally the stronger choice where bending strength, stiffness and fixing strength are important.
Its layers of wood veneer are arranged with alternating grain directions, helping the panel resist bending and giving it good strength without excessive weight.
MDF is dense and strong enough for many furniture applications, but its main advantages are its smooth surface and consistent machining rather than structural performance.
Plywood comes in various sizes and thicknesses that are ideal for different applications. For example, a thickness of 12mm is perfect for building cabinets, drawers, or even walls, whereas 18mm ply boards to 24mm thickness is better suited to building tables or flooring.
MDF, or Medium Density Fibreboard, is a material created by mixing the wood fibres of broken-down hardwood and softwood timber residuals with wax and formaldehyde resin glue. Then, these are pressed into flat sheets of MDF using high heat and pressure.
If you're looking to build outdoor furniture - especially here in the rainy UK - you'll need to use a material that can withstand the weather. For this purpose, plywood tends to be your best friend. Unlike MDF which can soak up a lot of water, plywood is more water resistant and will therefore be less likely to expand or warp due to moisture.
That said, there are now moisture-resistant, exterior grade MDF boards which perform well outdoors, such as the Medite Moisture Resistant MDF we stock at Cworkshop.
So, if you're planning on building a new bench or treehouse for your garden, plywood or moisture resistant MDF can work.
If you're planning to paint your furniture after building it, the MDF choice couldn't be more straightforward. MDF's grain-free, super smooth surface makes it an ideal material for painting. (We recommend sanding the cut edges first and using an oil-based primer for the best effect). With Plywood, you will need to ensure that the surface is well prepared to take on paint, but you will lose the natural look of the plywood's veneered surface which could be a beautiful feature.
If you want to use a stain for an attractive wood-like look, plywood works a charm. A lacquer or varnish will complement plywood's grain and provide a stylish finish.
On the other hand, MDF won't look good varnished or lacquered and should be painted instead. If you plan to create an attractive tabletop or frame that looks like stained natural wood, you should opt for suitable plywood.
Plywood is strong, durable and attractive, making it great for kitchen shelves or beautiful tables. It's also ideal for outdoor projects where the material will be exposed to moisture or cold because it can better handle these conditions. On the other hand, if you're planning to create intricate indoor furniture, build things that will be painted, or want to save a chunk of money, Medium Density Fibreboard is an excellent choice.
However, there's no need to choose just one or the other for your projects. Here at Cworkshop, we stock a vast range of different MDF cut to size boards and Plywood offerings, allowing you to select the options that are right for you. From birch and marine plywood to Medite moisture resistant or flame retardant MDF, you're sure to find the perfect material for you in our selection.
To find your ideal boards, check out our collections or get in touch today, and we'll help you find the suitable material for you.
