Why build a wooden house? The technical reasons — carbon, energy, speed and indoor climate
Wood is the only mainstream structural material that grows. A wooden house stores carbon, insulates well by itself, weighs a fraction of a concrete house and can be made in a factory to millimetre accuracy. Here is what that means in numbers and in practice.
Geoniks works with wooden houses only — log, timber frame and CLT homes, cabins and villas. We can’t help with concrete, steel, apartment or office buildings.
Carbon stored in the structure
Carbon makes up about half of the dry mass of wood. EN 16449 sets how to convert it to the CO₂ the tree took from the air: each kilogram of carbon corresponds to 44/12 ≈ 3.67 kg of CO₂. For a typical softwood with a dry density of about 450 kg/m³ that is roughly 225 kg of carbon — about 0.8 tonnes of CO₂ held in every cubic metre of timber for as long as the building stands.
This stored (biogenic) carbon is reported separately from the emissions of production in an environmental product declaration. Timber from forests certified to PEFC or FSC comes from forests managed so that they keep regrowing.
With Geoniks: Geoniks counts the timber, cladding, roof and floor quantities from your 3D model, so the volume of wood in your design is known before you ask for a price.
Design it in 3D →A material that insulates by itself
Wood conducts heat poorly. EN ISO 10456 gives softwood a thermal conductivity of about 0.13 W/(m·K), compared with about 2.3 W/(m·K) for reinforced concrete and about 50 W/(m·K) for steel. A timber stud is therefore a much smaller thermal bridge than a steel or concrete one, and a solid log wall contributes to the insulation on its own.
| Material | Thermal conductivity λ, W/(m·K) | Density, kg/m³ (approx.) |
|---|---|---|
| Softwood (spruce, pine) | 0.13 | 450–500 |
| Mineral wool insulation | 0.032–0.040 | 15–150 |
| Brick masonry | 0.6–1.0 | 1,400–1,900 |
| Reinforced concrete | 2.3–2.5 | 2,300–2,500 |
| Steel | 50 | 7,800 |
With Geoniks: See the U-value of every wall build-up in the editor, and how a thicker wall changes it.
Energy efficiency guide →Light structure, smaller foundations
Construction timber weighs roughly a fifth of concrete for the same volume while carrying load well along the grain. A lighter house means smaller loads on the ground: on poor soil or sloping plots this can mean simpler foundations, screw piles or pad footings, and easier building on difficult sites. On hillsides a timber house on a stone or concrete base is a common solution.
With Geoniks: Before choosing a house, check what fits on your land: buildable area, maximum footprint and number of floors.
Analyze my plot →Built in a factory, assembled in days
Most wooden houses are prefabricated: logs are cut by CNC machines with every joint and opening, timber frame walls arrive as closed elements with insulation and windows, CLT panels are cut to size with openings and service channels. The factory works in the dry and to tight tolerances, and the house shell is erected on site in days to a few weeks instead of months of wet work.
Prefabrication needs one thing above all: a finished, measured design. Changes are cheap on the screen and expensive once the factory has started cutting.
With Geoniks: Geoniks produces a dimensioned PDF drawing set and framing and prefab panel lists from your 3D model — the starting point a manufacturer needs.
How 3D design works →A dry, quiet indoor climate
Exposed wood buffers humidity: it takes up moisture when the air is humid and gives it back when the air is dry, which smooths out the swings of indoor humidity. Wooden surfaces feel warm to the touch because of their low conductivity. Sound needs attention in light structures — timber floors get floating screeds, resilient ceilings or mass to reduce impact noise — and a good manufacturer has tested floor build-ups for that.
Frequently asked questions
Is a wooden house environmentally friendly?
Wood stores carbon taken from the air — roughly 0.8 tonnes of CO₂ per cubic metre for a typical softwood — and comes from a renewable resource. Choosing timber from PEFC- or FSC-certified forests makes sure the forest keeps regrowing.
Is a wooden house warmer than a concrete house?
Wood conducts heat about 18 times less than reinforced concrete (about 0.13 vs 2.3 W/(m·K)), so timber structures have fewer and weaker thermal bridges. The final energy use depends on the insulation and airtightness of the whole house.
Is it faster to build with wood?
Usually yes. Wooden houses are largely made in a factory and the shell is erected on site in days to a few weeks. The time is spent beforehand on design, permits and production planning.
Are wooden houses noisy?
Not when floors are built correctly. Light timber floors need a floating screed, a resilient ceiling or added mass to reduce footstep noise; experienced manufacturers use tested floor build-ups.