Timber vs Brick and Concrete: The Real Sustainability Comparison

The material your building is made of is the single biggest environmental decision you will make about it — bigger than the heating system, bigger than the light bulbs. By the time you turn the key for the first time, the walls have already caused (or avoided) years’ worth of emissions.

So how does timber genuinely compare with brick and concrete? In this article we walk through the published figures across the whole life of a building — manufacturing, decades of use, and end of life — and we include the counterpoints too. Wood has a strong case, but only when it is sourced and built responsibly, and we would rather show you how to check that than simply claim it.

Why Concrete and Brick Carry So Much Embodied Carbon

Embodied carbon is the CO₂ released before a building is ever used: quarrying, firing, processing and transporting its materials. For masonry, that number is enormous.

Cement manufacturing alone is responsible for roughly 8% of global CO₂ emissions — around 1.6 billion tonnes in 2022, according to figures reported by MIT and others. If the cement industry were a country, it would be the world’s third-largest emitter after China and the United States.

Part of the problem is chemistry, not just fuel. Making cement means heating limestone until it releases CO₂ as a by-product — so even a kiln running on clean electricity would still emit carbon. Clay bricks have a related issue: they must be fired at around 1,000 °C, and published material inventories consistently put the embodied energy of fired brick well above that of sawn softwood per kilogram, with some estimates several times higher depending on the kiln and transport involved.

Timber Stores Carbon Instead of Emitting It

Wood is the only mainstream structural material that removes CO₂ from the atmosphere as it is made. A growing tree absorbs carbon dioxide, and roughly half the dry mass of the resulting timber is carbon.

The figure most often cited in industry and engineering sources is that one cubic metre of wood stores in the region of 0.9 to 1 tonne of CO₂, depending on the species, density and moisture content. That carbon stays locked in the timber for as long as the building stands — fifty years, a hundred, or more.

To make that concrete: the solid walls of a mid-sized log home contain several cubic metres of timber, with the floor and roof structure adding more. Even a modest garden building represents a meaningful store of carbon, while an equivalent masonry structure starts its life with a carbon debt instead. At the scale of whole buildings, comparative life-cycle studies of mass timber versus concrete construction have reported embodied-carbon reductions in the range of 22–50% for the timber versions.

Doesn’t Building in Wood Destroy Forests?

It is a fair question, and the answer depends entirely on where the wood comes from. In Europe, the trend may surprise you: EU forest area has grown by roughly 10% since 1990 — about 14 million hectares, an area the size of Hungary and Slovakia combined — to around 159 million hectares, covering close to 39% of the EU’s land, according to Eurostat and the European Parliament’s forestry fact sheets.

That growth is not an accident. Managed European forestry harvests less than the annual increment and replants continuously, which keeps the forest absorbing carbon while supplying timber. The critical word is managed: wood from illegal or unregulated logging can undo every benefit described in this article.

This is why chain-of-custody certification matters so much. The FSC system tracks timber from a responsibly managed forest through every processing step to the finished product, so the claim on the label is verifiable rather than a marketing line. We have covered what FSC certification means and how to verify it in a separate guide — every Satus Baltic building is made from FSC-certified Nordic spruce and pine, and you can ask to see the documentation.

Operational Energy: Insulation Is Built Into the Wall

Embodied carbon is only half the story; a building then consumes energy for decades. Here timber has a quiet structural advantage: it insulates by nature.

• Softwood conducts heat at roughly 0.13 W/m·K.
• Brick typically conducts at around 0.5–1.0 W/m·K, and the mortar joints between bricks conduct even better, creating thermal bridges through the wall.
• Dense concrete conducts better still, which is why masonry walls need a separate insulation layer to perform.

In plain terms, a solid timber wall loses heat several times more slowly than a bare masonry wall of the same thickness, and it has no mortar joints acting as escape routes for warmth. That is why choosing the right wall thickness matters: our buildings range from 28 mm walls for summer use up to 70 mm, and double-wall constructions of 44+44 mm or 70+70 mm with a cavity (typically 100 mm) that takes insulation for genuine year-round living. For a cabin used through winter, pairing the right wall with an insulated roof and floor is what turns a low-carbon building into a low-bill one as well.

End of Life: Demolition Waste vs Reuse

Buildings do not last forever, and what happens afterwards is part of the sustainability equation. Construction and demolition activity generates around 38% of all waste in the EU — the largest single waste stream — according to Eurostat. Much of the mineral fraction is recovered, but mostly by being crushed into low-grade fill: a one-way trip down the value chain.

A timber building behaves differently at the end of its life. It can be dismantled rather than demolished; sound logs and beams can be reused or remanufactured; and untreated offcuts are biodegradable or can be used for energy recovery, releasing only the carbon the tree absorbed in the first place. A well-built log cabin can even be dismantled and re-erected on a new site — try that with a brick outbuilding.

The Honest Counterpoints

A sustainability argument that hides the weak points is just greenwashing, so here are the common objections and what the evidence actually says.

“Brick lasts longer”

Masonry is undeniably durable and needs little surface maintenance. But the idea that wooden buildings are short-lived is a myth: Northern Europe is full of timber churches and town centres that are several centuries old. The honest version is that wood’s longevity is conditional — it depends on dry detailing, ventilation and a finish renewed every few years. Our guide to maintaining a wooden house covers what that routine actually involves.

“Wood burns”

Masonry does not burn, and that is a genuine advantage. But the perception of timber as a fire hazard does not match how solid wood behaves in engineering terms: thick timber sections char on the surface at a slow, predictable rate (European fire design standards work with roughly 0.6–0.7 mm per minute for softwood), and the char layer protects a load-bearing core. This predictability is exactly why fire engineers can design multi-storey timber buildings to code across Europe. For a garden building or log home, standard precautions — sensible stove installation, smoke alarms — matter far more than the wall material.

“Wood is only green if it’s sourced right”

Correct — and this is the point we most want you to take seriously. Uncertified timber of unknown origin, or a cabin shipped across the world, can cancel out much of the carbon benefit. The material alone is not the argument; the supply chain is.

What You Can Practically Check as a Buyer

You do not need a life-cycle assessment to buy responsibly. Ask any supplier these questions:

• Certification: Is the timber FSC (or PEFC) certified, and can they show chain-of-custody documentation rather than just a logo?
• Where it is made: A named factory you could visit is a good sign. Our buildings are manufactured in Vydmantai, Lithuania, and have been since 2011.
• Transport distance: European timber delivered by road within Europe carries far less transport carbon than intercontinental shipping.
• Species and origin: Slow-grown Nordic spruce and pine are dense, stable and local to the Baltic region.
• The right specification: An honest supplier will match wall thickness and insulation to how you will actually use the building, rather than overselling.

Thinking About Building in Wood?

Browse our catalogue of 34 log cabin, garden building and garage models — every one can be customised, from wall thickness to layout. Or tell us what you have in mind through the custom quote form: a real person prepares your quotation by hand within one business day, FSC documentation included.