Blog
No more black box: evidence, not claims
In construction, the rule is often: “Trust our figures – how they are produced remains our secret.” We deliberately take the opposite path. Anyone planning infrastructure for decades does not need glossy brochures, but traceable foundations. That is why we disclose on jumboblock.org and on this website how we calculate, what we rely on and which rules apply – block by block.
Why a black box is no longer enough
A rainwater storage system stays in the ground for decades. It carries traffic, holds back heavy rain and is increasingly part of the critical infrastructure of municipalities, utilities and operators. Since March 2026, Germany’s KRITIS Umbrella Act requires operators of critical facilities to demonstrate resilience – physical, not only digital. Anyone who has to demonstrate resilience can do little with figures that come without a calculation path.
Engineering: open calculation paths instead of flat-rate values
The JUMBO BLOCK Engineering Suite guides you through the planning of an installation – from hydrology to life-cycle assessment. All programs work with a shared project file, the project.dbm, whose content is secured with a checksum (SHA-256).
- Hydro: storage verification per DWA-A 117 with KOSTRA-DWD-2020
- Plan and Design: number of modules, quantities, 3D model and CAD export
- Budget: cost framework from the planned quantities
- Static, Footprint and Temp: structural calculation, life-cycle carbon footprint and heat balance – calculated on request from your project.dbm, with a complete PDF report
One example is JUMBO BLOCK Footprint: the quantities come from the structural analysis, every characteristic value is listed with source and validity in the report, and system boundaries and comparison method are publicly described in the manual – including a conservative lower bound in which every open assumption favours the comparison system.
KRITIS: tools for emergencies
Resilience shows when something fails. For that case, jumboblock.org provides free programs that work completely offline and encrypted – also directly from a USB stick:
- Logbook, reporting obligations and inventory for crisis teams, NIS-2 and KRITIS reports and the device and network register
- Checksums, encryption, certificates and passwords for operations when the usual IT is unavailable
- JUMBO BLOCK Rescue: a bootable work and rescue stick with 35 rescue tools and the complete Engineering Suite
- a self-assessment on the KRITIS Umbrella Act, NIS-2 and the Cyber Resilience Act
No program makes an operator compliant. But each one helps to stay operational in an emergency and to document what was done.
Office: working without someone else’s cloud
In addition, there are office programs for everyday work: texts and documents, spreadsheets, calculator and units, notes, PDF tools, GAEB bills of quantities, project planning, a maintenance and inspection log, files, archives and an end-to-end encrypted direct chat. Everything runs locally in the browser. Data only leaves your computer if you want it to.
Regulatory framework: what actually applies
On our regulatory framework page we classify JUMBO BLOCK under building regulations, Eurocodes, water law and sealing – with the relevant sections and standards and a dedicated part on typical objections and what actually applies.
Physical and digital: the missing building block
Laws demand resilience – they do not say how it is built. JUMBO BLOCK combines both: an individually designed load-bearing structure of reinforced concrete that can be driven over, walked through and monitored, and a digital environment that makes planning, monitoring and crisis operation traceable. The live dashboard with a public interface shows how sensor data of an installation is provided in a verifiable way.
Evidence, not claims. Anyone with better data can prove it. Anyone with doubts can check our foundations.
What we do not disclose
Transparency does not mean giving everything away. Our intellectual property rights, the mix designs of our partner plants and the full versions of the calculation programs remain protected. We provide structural calculations, carbon footprints and heat balances as an engineering service based on your project.dbm. What is open are the methods, the foundations and the results – with assumptions, sources and checksums in every report.
All public programs, manuals and documents are available on jumboblock.org. We welcome questions and evidenced feedback: mail@jumboblock.de.