A wooden outdoor kitchen is generally more eco-friendly than a steel one, mainly because wood is a renewable raw material that stores CO₂ during its lifetime and requires little energy for production and processing. Unlike steel, wood doesn't need heavy industrial processes, coatings or international supply chains to function outdoors. So the environmental gain isn't down to one single property, but to the entire life cycle of the material. In this blog you'll read why that is often the deciding factor when choosing a sustainable outdoor kitchen.
Origin of Douglas fir versus steel
If you're going for sustainability, it's smart to look first at where a material comes from. And that's where wood scores a lot better. Douglas fir grows relatively quickly and is usually simply produced in Europe. That means short transport distances and therefore lower CO₂ emissions before it ends up in your garden.
With steel it's a different story. Production devours huge amounts of energy, requires high temperatures and the raw materials often come from all over the world. Steel is admittedly easy to recycle, but that initial environmental hit from production remains considerably heavier than with wood.
CO₂ emissions during and after production
Wood and steel differ fundamentally in how they deal with CO₂:
Wood stores CO₂: Throughout its entire lifetime, the CO₂ remains locked in the material. With a wooden outdoor kitchen, the wood literally helps to hold on to carbon.
Steel emits CO₂: Its production causes substantial emissions. Only at the end of the life cycle can part of it be recovered through recycling, but that doesn't fully offset the original emissions.
Comparison table: wooden or steel outdoor kitchen
| Aspect | Wooden outdoor kitchen | Steel outdoor kitchen |
| CO₂ during production | Low, wood stores CO₂ | High due to energy-intensive process |
| Origin | Often local or European | Raw materials from around the world |
| Lifespan | Long with the right construction | Long, depending on the coating |
| Maintenance | Natural, simple | Depends on protective layers |
| Circularity | Easily reusable | Recyclable, but energy-intensive |
Lifespan: steel doesn't win automatically
Steel supposedly lasts so much longer than wood; you hear that a lot. But that's not entirely true. A well-built wooden outdoor kitchen made of Douglas fir with a thickness of 2.8 cm lasts for years, especially if the wood is double-planed and given room to move with the seasons. The difference lies mainly in how a material ages. Wood turns grey naturally and keeps its character. Steel, on the other hand, needs coatings and treatments to prevent rust. And those extra protective layers? They have their own environmental impact too.
Maintenance and environmental impact
Maintenance plays a bigger role than you might think. Wood does need attention, but that doesn't have to involve chemicals. Many people deliberately let it turn grey or occasionally use an eco-friendly oil. That simply suits a garden centred on biodiversity and natural materials better, too.
Steel seems low-maintenance, but it depends entirely on protective layers such as powder coating or zinc coatings. As soon as these are damaged, it starts to rust and repairs are needed. That, too, involves raw materials and energy.
Suits a sustainable lifestyle
For sustainably minded buyers, it's about more than just environmental figures. It's about a logical choice that fits with how you design your garden. If you choose native plants, a pond for biodiversity and compost instead of artificial fertiliser, a steel kitchen simply doesn't fit in.
Wood fits that approach. It turns grey in the same way as a wooden fence or decking, comes from the same region and needs no synthetic maintenance products. That makes your choice consistent, without having to explain to yourself or others why you garden sustainably but don't use sustainable materials.