solid UNIT
Solid UNIT is a German registered association operating an innovation network for sustainable construction with mineral building materials, connecting construction firms, materials manufacturers, trade associations, and research institutions across 10+ German federal states via membership-based recurring fees.
- Company typePrivate
- Founded2019
- HeadquartersBerlin, Germany
- Headcount51–100
- GTM typeB2B
- OfferingServices
What solid UNIT does
Solid UNIT, legally solid UNIT e.V., is a German registered association (eingetragener Verein) headquartered in Berlin that operates an innovation network focused on sustainable construction using mineral building materials such as CO2-reduced concrete, carbon concrete, 3D-printed concrete, recycled concrete, lightweight concrete, calcium silicate brick, brick, and precast concrete elements. Founded in 2019, the organization connects partners across construction planning, the construction industry, the building materials industry, and research and teaching through six strategic network teams covering CO2 reduction, resource efficiency, startups, climate resilience, sustainable transport and infrastructure construction, and modular construction. It maintains regional chapters across 10+ German federal states (including Baden-Württemberg, Bayern, Bremen, Hamburg, Hessen, Niedersachsen, Nordrhein-Westfalen, Saarland, Sachsen, and Schleswig-Holstein) and has signaled presence in Austria, Switzerland, and the Netherlands.
Solid UNIT generates revenue through membership fees across three tiers: regular membership for associations, chambers, and research institutions; sponsoring membership for companies, suppliers, manufacturers, planners, and architects; and advisory board membership for scientific participants. Its offerings are not commercial products but networked services: a knowledge platform (bau-klimaneutral.de), a project showcase database, position papers and publications, a technical glossary, an events program (Forum Zukunft Bauen, Wohnungsbau neu gedacht), a storytelling platform (solid STORIES), and a newsletter. Strategic partners include global materials majors (Holcim, CEMEX), large contractors (STRABAG, Züblin, Göldbeck), industry associations (DGfM, Bundesverband Ziegel, Bundesverband Kalksandstein, FDB, Bundesverband der Deutschen Transportbetonindustrie), and research institutions (KIT), with the network engaging politically through climate advisory board meetings at the German Bundestag and state parliaments.
Operationally, Solid UNIT is governed by a board chaired by Tobias Riffel (also Vice-President of Bauwirtschaft Baden-Württemberg) with Thomas Zawalski as Geschäftsführer and a board composed predominantly of representatives from member associations and regional chapters. Recent ecosystem activity in 2025-2026 has showcased member-company innovations such as Röser GmbH's reCO2ver® concrete recycling (up to 15 kg CO2 bound per tonne of demolition material, plus 50-60 kg CO2 per tonne of cement stone dust via recarbonation), SÜLZLE's STOOX reinforcement steel (CO2 footprint below 400 kg CO2 per tonne vs. 1,770 kg global average), Kronimus's Durakron block steps (35% CO2 reduction per unit), B2PURE® BioBitumen, KS*ReCO CO2-optimized limestone brick, and KIT's NT-Belitzement circular concrete. The organization is member-funded with no external equity backing, and financials are not publicly disclosed.
solid UNIT firmographics
Firmographics- Name
- solid UNIT
- Legal name
- solid UNIT e.V.
- Website
- https://solid-unit.de
- Company type
- Private
- Founded year
- 2019
- Operating status
- Operating
- Headcount range
- 51–100 employees
- Short description
- Solid UNIT is a German registered association operating an innovation network for sustainable construction with mineral building materials, connecting construction firms, materials manufacturers, trade associations, and research institutions across 10+ German federal states via membership-based recurring fees.
- Ownership category
- akta.pro rank
solid UNIT industry classification
Industry- Product category
- Construction Industry Network and Knowledge Platform
- SIC
- Services-Engineering Services (8711)
- akta.pro primary industry
- Infrastructure, Engineering & Public Works Technical Assistance (WASH/Transport/Energy) (BPADAEAF)
- akta.pro secondary industries
- Construction Management & General Contracting (EPCM, Scheduling, QA/QC, HSE) (EUAMAFAJ), Environmental & Permitting Compliance During Construction (Erosion Control, Wildlife Mitigation, Monitoring) (EUAMAFAM)
Keywords
Where solid UNIT is headquartered
LocationHeadquarters
- HQ city
- Berlin
- HQ country
- Germany
- HQ region
- Europe
Offices1 record
Markets served
solid UNIT business model
Business model- GTM type
- B2B
- Offering type
- Services
- Cost components
- Personnel, Operations, Marketing or Sales, Technology or R&D, Others
Revenue model
- Membership Fees: solid UNIT operates as a membership-based association with different types of membership: regular membership for associations, chambers, and research institutions; sponsoring membership for companies, suppliers, manufacturers, planners, and architects; and advisory board membership for scientific participation.
Go-to-market motion1 record
Distribution channels1 record
Marketing channels6 records
solid UNIT product offering
Product offeringCore offering
solid UNIT operates a membership-based innovation network (solid UNIT Netzwerk) that connects partners from construction planning, the construction industry, the building materials industry, and research and education to drive innovation in sustainable construction with mineral building materials such as CO2-reduced concrete, carbon concrete, 3D concrete printing, recycled concrete, lightweight concrete, calcium silicate brick, brick, and precast concrete elements. The network delivers value through six strategic teams covering CO2 reduction, resource efficiency, start-ups, climate resilience, sustainable transport/infrastructure construction, and modular construction, supported by a knowledge platform, project showcase, publications, events, newsletter, glossary, and political advocacy via the Klimabeirat.
Product overview
solid UNIT is an innovation network for sustainable construction with mineral building materials, not a traditional product company. The organization connects partners from construction planning, industry, building materials sector, and research. Its offerings include a knowledge platform on climate-neutral construction, a project showcase database, publications/position papers, events/forums, and networking services. The network organizes six strategic teams focused on CO2 reduction, resource efficiency, startups, climate resilience, sustainable transport/infrastructure construction, and modular construction. Partner membership is available at national and regional (state) levels including Baden-Württemberg, Bavaria, and other German states.
Differentiator
Problem solved
Functional benefit
Products and services
- solid UNIT Netzwerk (Innovation Network) Membership-based innovation network connecting partners from construction planning, the construction industry, the building materials industry, and research/education to drive sustainable construction with mineral building materials; organized around six strategic network teams.
- Klimaneutral Massiv Bauen Wissensplattform Knowledge platform providing information on climate-neutral solid construction for planners, architects, construction companies, and education professionals.
- solid STORIES Platform presenting stories about sustainable construction from the next generation of construction professionals.
- Veranstaltungen (Events Program) Event organization service hosting forums, workshops, and conferences on sustainable construction topics such as "Wohnungsbau neu gedacht" and "Forum Zukunft Bauen".
- Massivbau-Projekte (Project Showcase) Database of exemplary innovative solid construction projects demonstrating sustainable building practices with categories including residential, commercial, public buildings, infrastructure, 3D printing, carbon concrete, and CO2-reduced concrete.
- Publikationen (Position Papers and Publications) Position papers, climate resilience recommendations, and policy guidance on sustainable construction with mineral building materials, including contributions from member organizations DGfM, IZB, Bundesverband Ziegel, and Kalksandstein.
- Glossar (Technical Glossary) Technical glossary explaining construction terminology including 3D printing, building component activation, concrete precast parts, reinforcement, BIM, carbonation, carbon concrete, CO2 reduction, cradle-to-cradle, lightweight concrete, modular construction, and recycling.
- Newsletter Service Email newsletter keeping subscribers informed about solid UNIT news and updates; distributed via the Sendinblue platform.
Quantifiable outcome
- Up to 15 kg CO2 bound per tonne of crushed concrete demolition material through reCO2ver® process
- +3 more outcomes
Companies that use solid UNIT
Customer profileSegments4 records
Ideal customer profiles2 records
solid UNIT technology and API
TechnologyTechnology focussed No
API detail
- Has API
- No
- API docs
- API detail
Core technology
AI maturity
App detail
Integration2 records
Feature3 records
solid UNIT partnerships and signals
Strategic signalPartnerships
16 partnerships are on record, tiered core and minor.
- InformationsZentrum Beton (IZB)coreInformationsZentrum Beton is a core network partner providing expertise on concrete construction and sustainable building with concrete materials.
- HolcimcoreHolcim (formerly HeidelbergCement) is a global building materials company and key partner in sustainable concrete innovation.
- ZüblincoreEd. Züblin AG is a major construction company and partner in sustainable construction projects within the network.
- CEMEXcoreCEMEX is a global building materials company and partner in sustainable construction innovation.
- Deutsche Gesellschaft für Mauerwerksbau (DGfM)coreGerman Society for Masonry Construction is a key partner providing expertise on brick and masonry construction methods.
- Bundesverband ZiegelcoreGerman Brick Association provides expertise on brick production and sustainable masonry construction.
- Bundesverband KalksandsteincoreGerman Calcium Silicate Brick Association provides expertise on calcium silicate brick for sustainable construction.
- Karlsruher Institut für Technologie (KIT)coreKIT contributes research expertise to the network, particularly on climate-neutral circular concrete through cement recycling and carbonation.
- Röser GmbHcoreRöser GmbH developed the reCO2ver® technology for concrete recycling, which converts demolished concrete into high-quality recycled aggregate for new concrete production.
- SÜLZLE StahlpartnercoreSÜLZLE Stahlpartner developed STOOX sustainable reinforcement steel with documented CO2 footprint, targeting reduced emissions in construction.
- Bundesstiftung BauakademiecoreBundesstiftung Bauakademie supports the testing of innovative construction methods and advocates for scaling new solutions through the network.
- Deutsche Gesellschaft für Nachhaltiges Bauen (DGNB)coreDGNB provides expertise on sustainable building certification and contributes to the climate advisory board.
- STRABAGcoreSTRABAG is a major European construction company and network partner for sustainable construction.
- GöldbeckminorGöldbeck is a construction company partner in the network.
- Fachvereinigung Deutscher Betonfertigteilbau (FDB)coreFDB provides expertise on precast concrete construction methods and sustainable building practices.
- GROUNDBREAKERSminorNew innovation alliance between GROUNDBREAKERS and solid UNIT Baden-Württemberg for promoting sustainable construction.
Scale indicators2 records
Recent moves6 records
Expansion highlights5 records
solid UNIT competitors and assessment
Company assessmentDirect peers
- DGNB (Deutsche Gesellschaft für Nachhaltiges Bauen): Germany's leading sustainable building certification body. Overlaps with solid UNIT on promoting climate-friendly construction, share partners, and target similar members (planners, architects, builders) — but is broader in scope across all building types.
- Bauwirtschaft Baden-Württemberg: Regional German construction industry association whose Vice-President also chairs solid UNIT Deutschland. Operates as an overlapping regional industry body with shared member base and policy advocacy in construction.
- Bundesverband Baustoffe – Steine und Erden: German trade association for the building materials industry (stones and earths). Represents many of the same manufacturers as solid UNIT's members and engages on parallel policy and decarbonization topics.
- Concrete Sustainability Council: Global multi-stakeholder organization driving sustainable practices in the concrete value chain. Closely aligned with solid UNIT's focus on CO2-reduced concrete, recycled aggregates, and responsible sourcing of mineral materials.
Emerging players
- CarbonCure Technologies: Concrete technology company commercializing CO2 injection during mixing. Competes in the same thematic space (CO2-reduced concrete) that solid UNIT showcases, but does so as a product company rather than as an industry network.
- Construction Innovation Hub (UK): UK-based innovation network driving productivity and sustainability in construction. Mirrors solid UNIT's model of convening industry, research and government to accelerate adoption of new methods and materials, but focused on the UK market.
Broad incumbents
- Hauptverband der Deutschen Bauindustrie: Germany's main construction industry federation representing large contractors. Board representation overlaps with solid UNIT's leadership and covers broader policy and labor issues across the German building sector.
- Global Cement and Concrete Association (GCCA): Global industry association for the cement and concrete sector advancing net-zero roadmaps and member commitments. Comparable mission to solid UNIT's CO2 reduction team but at global scale and focused specifically on cement/concrete manufacturers.
- CEMBUREAU: European cement industry association representing producers and lobbying at EU level on decarbonization. Shares solid UNIT's interest in low-CO2 cementitious materials and engages a comparable set of corporate members.
- World Business Council for Sustainable Development (WBCSD): Global CEO-led organization advocating business action on sustainability. Operates at a much broader scope than solid UNIT but engages overlapping multinational construction and materials members on climate and built environment programs.
Market position
Strengths5 records
Weaknesses5 records
Competitive moat4 records
Key risks5 records
Key highlights6 records
Customer concentration
solid UNIT social profiles
Digital presencesolid UNIT financial estimates
Financial estimateRevenue estimate
Valuation estimate
solid UNIT leadership team
Management profileNumber of profiles
Profiles17 records
solid UNIT funding detail
Funding detailFunding overview
Funding rounds
Investors
Funding detail is available on the Subscription and Enterprise plan.Contact sales →
solid UNIT M&A and investment
M&A and investmentM&A
Investments
M&A and investment is available on the Subscription and Enterprise plan.Contact sales →
Frequently asked questions about solid UNIT
What does solid UNIT do?
solid UNIT operates a membership-based innovation network (solid UNIT Netzwerk) that connects partners from construction planning, the construction industry, the building materials industry, and research and education to drive innovation in sustainable construction with mineral building materials such as CO2-reduced concrete, carbon concrete, 3D concrete printing, recycled concrete, lightweight concrete, calcium silicate brick, brick, and precast concrete elements. The network delivers value through six strategic teams covering CO2 reduction, resource efficiency, start-ups, climate resilience, sustainable transport/infrastructure construction, and modular construction, supported by a knowledge platform, project showcase, publications, events, newsletter, glossary, and political advocacy via the Klimabeirat.
Is solid UNIT a public or private company?
solid UNIT is a private company. It is classified as nonprofit foundation owned and is currently operating.
When was solid UNIT founded?
solid UNIT was founded in 2019. It employs 51 to 100 people.
Where is solid UNIT based?
solid UNIT is headquartered in Berlin, Germany, in the Europe region.
How does solid UNIT make money?
One revenue line is on record: membership Fees.
Who are solid UNIT's main competitors?
Direct peers on record are DGNB (Deutsche Gesellschaft für Nachhaltiges Bauen), Bauwirtschaft Baden-Württemberg, Bundesverband Baustoffe – Steine und Erden and Concrete Sustainability Council. Emerging players are CarbonCure Technologies and Construction Innovation Hub (UK). Broad incumbents are Hauptverband der Deutschen Bauindustrie, Global Cement and Concrete Association (GCCA), CEMBUREAU and World Business Council for Sustainable Development (WBCSD).
Does solid UNIT have an API?
No public API is recorded for solid UNIT.
What industry is solid UNIT in?
solid UNIT's product category is Construction Industry Network and Knowledge Platform. Its primary akta.pro industry code is BPADAEAF, Infrastructure, Engineering & Public Works Technical Assistance (WASH/Transport/Energy), with a secondary code of EUAMAFAJ, Construction Management & General Contracting (EPCM, Scheduling, QA/QC, HSE). Its SIC code is 8711.