Reuse: used scaffolding and sustainable construction
Sustainability in construction is usually discussed in terms of insulation, heat pumps and timber frames. The temporary works that make every building possible get less attention, although a facade scaffold contains a considerable amount of steel. Every bay of scaffolding that is used again, instead of being made new, saves the emissions of that steel. For contractors who have to report on carbon, or who bid for clients with sustainability targets, this is a lever that is easy to quantify.
Why scaffolding is an underestimated lever
Steel is the backbone of almost every system scaffold, and steel production is among the most carbon-intensive processes in construction. Conventional blast-furnace steel causes roughly 2.0 to 2.5 t of CO2 per tonne of steel. Electric arc furnace steel made from scrap is lower, at around 0.8 t per tonne, but still far from zero.
A scaffold component is an ideal candidate for reuse. It is robust, standardised, galvanised against corrosion and built to last for decades. While many building materials end up in landfill or are downcycled after one life, a frame, a ledger or a steel deck can serve one project after another at the same quality level, provided someone runs a market for checked second-hand parts.
Embodied carbon: the footprint sits in production
Most of the environmental impact of a scaffold arises not on site but in its manufacture: raw materials, smelting, rolling, welding and hot-dip galvanising. In life-cycle terms these are modules A1 to A3 (cradle to gate). This embodied energy has already been spent the moment the part exists. Reuse makes use of it again instead of spending it a second time. Under EN 15804, the benefit of reuse beyond the first life is reported separately in module D.
The operational phase of a scaffold, by contrast, causes few emissions: transport, erection and dismantling. That is why the question of new or used material dominates its carbon balance.
An estimate you can follow
The saving can be put into numbers. CETRAC uses a simple substitution method: whoever buys used scaffolding replaces the production of an equivalent amount of new steel.
Avoided emissions = area × steel per m² × CO2e per kg of steel × (1 − reconditioning allowance)
- Steel per m²: about 15 to 25 kg depending on system; a standard steel frame facade scaffold is around 18 kg/m².
- CO2e per kg of steel: about 1.7 kg for galvanised structural steel by the conventional route (higher for primary steel, lower for scrap-based steel).
- Reconditioning allowance: 5 % for inspection, transport and light repair of the used material.
With these defaults, 18 kg × 1.7 kg × 0.95 gives about 29 kg CO2e per m² of reused scaffold area.
| Scaffold area | Steel (approx.) | Avoided CO2e (rounded) |
|---|---|---|
| 100 m² | 1.8 t | approx. 2.9 t |
| 250 m² | 4.5 t | approx. 7.3 t |
| 500 m² | 9.0 t | approx. 14.5 t |
| 1,000 m² | 18 t | approx. 29 t |
| 2,500 m² | 45 t | approx. 73 t |
These are worked examples based on stated assumptions, not a product declaration and not a claim of climate neutrality. Use your own figures for steel weight and emission factor where you have them. Weights by system are listed in scaffolding weight.
Circular economy in practice
The circular economy means keeping materials circulating for as many cycles as they can bear, rather than discarding them after one job. Used scaffolding fits this idea well:
- Long-lived: galvanised steel scaffolds serve for decades with proper care.
- Standardised: parts are made to system dimensions and can be added to, replaced and recombined within the same system.
- Fully reusable: no downcycling, the part keeps its function and quality level.
- Repairable: damaged decks, bent braces or worn jacks are sorted out and replaced individually, while the rest of the set stays in service. See wear on scaffold parts.
The same logic applies to formwork. Panels, beams and props from established systems are reconditioned and used again; see used formwork and refurbished formwork parts.
Closing the loop: buying back and exchanging
A loop needs a way back. CETRAC buys used scaffolding and formwork, from single loads to complete company stocks. You give us a rough estimate of the stock, we agree a fixed price per item beforehand, and we pay for what is really loaded onto the truck; see sell your scaffolding.
Rebuy covers anything bought from CETRAC itself: if a part is still technically perfect, we repurchase it during the first five years, deducting only 15 % from the list price. What is sold today returns to the yard tomorrow and goes to the next project instead of the scrap merchant.
Contractors who want to move from frame to modular scaffolding can exchange their frames for the new MGS-A system, available from 2027: one frame for one standard, guard rails one for one, diagonals and toe boards two for one. Details on the scaffolding exchange page. The frames that come in go back into circulation as used material.
What it means for your project and your reporting
Building sustainably and building economically are not opposites when it comes to scaffolding:
- Lower cost than new material with the same function and safety, provided the parts are inspected. Indicative prices for used frame packages lie between roughly €30 and €40 per square metre plus VAT (status October 2026).
- Available without waiting for new production, and less exposed to steel price swings.
- A documentable contribution for tenders, ESG reports and clients with sustainability targets, for example under the EU taxonomy or corporate reporting rules.
- Retained value: inspected system scaffolding keeps a resale value for years.
Used material is only sustainable if it is safe. Inspected used scaffolding meets the same requirements as new: steel does not lose load capacity through reuse, but straightness, dimensions and corrosion must be checked. How CETRAC checks parts is described under quality. To size a project and see the matching parts list, use the scaffolding calculator.