Bundesverband Kalksandsteinindustrie e.V.

What Bundesverband Kalksandsteinindustrie e.V. does

The Bundesverband Kalksandsteinindustrie e.V. (BV KSI) is a German non-profit trade association (eingetragener Verein) founded in 1900 in Berlin and headquartered in Hannover, Niedersachsen. It represents the interests of Kalksandstein (calcium silicate brick) manufacturing plants across Germany and supports the broader masonry construction industry. Its wholly-owned subsidiaries include Forschungsvereinigung Kalk-Sand e.V., which has conducted joint pre-competitive research since 1965, and Kalksandstein-Dienstleistung GmbH, the operational service company that runs the kalksandstein.de website, publications, and digital tools. The association is governed by a board chaired by Jan Dietrich Radmacher, with Roland Meißner serving as Managing Director over 11 employees.

The association's core product is the Kalksandstein masonry unit, manufactured from sand, lime, and water in approximately a 12:1 ratio, pressed into brick forms and cured via steam hardening in autoclaves. Calibrated to a single technical and sustainability standard, the material is the market leader in German multi-story residential construction, holding 34% share of completed residential buildings with 3+ units and ~38% of 55.41 million m³ of built volume in 2024 (per Destatis). It supports the product with the 16-chapter KALKSANDSTEIN Planungshandbuch (8th edition, 2025), the KS-Schallschutzrechner acoustic calculator, an academic youth sponsorship program, and the Kalksandstein-Gütesiegel and new Kalksandstein-Nachhaltigkeitsgütesiegel (KS-NGS) quality and sustainability labels.

The association generates revenue through membership contributions from ordinary Kalksandstein manufacturing plants and extraordinary associate members, operating through a hybrid GTM model combining a free digital self-serve layer (website downloadcenter, digital tools) with an enterprise field-sales layer delivered through eight Regionalvereine (regional associations) that provide direct technical consulting to architects, engineers, planners, and construction firms. The non-commercial model is explicitly oriented toward collective research, standardization, political advocacy, and shared marketing for member companies rather than product sales.

Name

Bundesverband Kalksandsteinindustrie e.V.

Legal name

Bundesverband Kalksandsteinindustrie e.V.

Website

https://kalksandstein.de

Company type

Private

Founded year

1900

Operating status

Operating

Headcount range

11–50 employees

Short description

Bundesverband Kalksandsteinindustrie e.V. is a German non-profit trade association founded in 1900 that represents Kalksandstein (calcium silicate brick) manufacturers, providing technical consulting, research, standardization, and political advocacy for the German masonry construction industry.

Ownership category

akta.pro rank

Product category

Building Materials Industry Association

NAICS

Other Similar Organizations (except Business, Professional, Labor, and Political Organizations) (813990)

SIC

Services-Membership Organizations (8600)

akta.pro primary industry

Certification Program Administration & Scheme Management (Standard Owners) (AFALACAC)

akta.pro secondary industries

Pre-Assessment, Gap Assessment & Certification Readiness Services (AFALACAE), Supplier Quality Assurance & Vendor Approval Programs (AFALALAB), Trade Compliance, Standards & Technical Barriers to Trade (TBT/SPS) (BPADAMAK)

Keywords

• Masonry industry association
• Calcium silicate bricks
• Masonry construction standards
• Residential building materials
• Sustainable building products

Headquarters

HQ city

Hannover

HQ country

Germany

HQ region

Europe

Offices1 record

Markets served

GTM type

B2B

Offering type

Services

Cost components

Personnel, Operations, Marketing or Sales, Technology or R&D, Infrastructure

Revenue model

1. Membership contributions: The association generates revenue through membership fees from ordinary members (Kalksandstein manufacturing plants/works) and extraordinary members (associate companies in the industry). The Bundesverband coordinates collective research, standardization, political advocacy, and marketing for member companies.

Go-to-market motion1 record

Distribution channels4 records

Marketing channels7 records

Core offering

Bundesverband Kalksandsteinindustrie e.V. is a non-profit trade association representing German Kalksandstein (calcium silicate / sand-lime brick) manufacturers. It provides industry coordination, technical standards, sustainability certification (KS-NGS and Kalksandstein-Gütesiegel), free planning tools (such as the KS-Schallschutzrechner), the KALKSANDSTEIN Planungshandbuch, political advocacy, and joint pre-competitive research through its subsidiary Forschungsvereinigung Kalk-Sand e.V. Operations are supported by wholly-owned service subsidiary Kalksandstein-Dienstleistung GmbH.

Differentiator

Problem solved

Functional benefit

Products and services

• KALKSANDSTEIN Planungshandbuch (8th Edition) A comprehensive 16-chapter planning handbook for architects, engineers, construction professionals, and students covering statics (Eurocode 6), fire protection, acoustic insulation, thermal protection, building physics, and sustainability. Available as a free download via the website downloadcenter.
• Kalksandstein-Nachhaltigkeitsgütesiegel (KS-NGS) Sustainability Label An industry-wide uniform assessment procedure for determining and documenting the ecological performance of Kalksandstein products. Based on independent, standards-compliant life cycle assessments covering parameters including GWP, PENRT, PERT, ODP, EP, and POCP. Awarded to participating Kalksandstein manufacturing plants.
• Kalksandstein-Gütesiegel (Quality Seal) Quality seal for Kalksandstein products ensuring consistent quality standards across member manufacturing plants, with CE marking and performance declaration per DIN 20000-402.
• KS-Schallschutzrechner (Acoustic Protection Calculator) A digital tool for architects and engineers to calculate and verify acoustic insulation performance of Kalksandstein constructions. Available free online with expanded modules for double-skin party walls.

Quantifiable outcome

• 34% market share among all completed residential buildings with 3+ units in Germany (2024, Destatis)
• +5 more outcomes

Named customers3 records

Segments4 records

Ideal customer profiles4 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature5 records

Partnerships

Ten partnerships are on record, tiered major, core and minor.

• Emsländer Baustoffwerke GmbH & Co. KGmajorStrategic or Co-development Partner · 1 January 2024Member company of the Kalksandstein industry that invested approximately 10 million euros in PreFabWall serial prefabrication technology. Managed by Bernhard Göcking (also Chair of Forschungsvereinigung Kalk-Sand e.V.) and Cornelius de Boer. Hosted Lower Saxony Minister-President Olaf Lies for a site visit in March 2026 to demonstrate modern masonry prefabrication.
• Kalksandstein-Dienstleistung GmbHcoreStrategic or Co-development PartnerA wholly-owned service company of the Bundesverband Kalksandsteinindustrie e.V. that provides operational services including the website (kalksandstein.de), publications, digital tools, and the member intranet. Handles day-to-day operations, IT services, and distribution of industry resources.
• Forschungsvereinigung Kalk-Sand e.V.coreStrategic or Co-development PartnerThe research association of the Kalksandstein industry, conducting precompetitive joint research since 1965. Operates at the same Hannover location as the Bundesverband. Responsible for research projects on sustainability, lifecycle assessment, recarbonatization, recycling, and process optimization. Board chair is Bernhard Göcking of Emsländer Baustoffwerke. Zakaria Istanbuly serves as deputy head.
• Qualitätsgemeinschaft Mauerwerksprodukte e.V. (QMP)coreStrategic or Co-development PartnerQuality association for masonry products that certifies and monitors quality standards across masonry product manufacturers in Germany. The Bundesverband Kalksandsteinindustrie is a member and supports its quality assurance mission.
• solid UNIT DeutschlandminorGTM or Marketing PartnerA network or association in the construction industry whose representatives participated in the Minister-President's visit to Emsländer Baustoffwerke. Tobias Riffel serves as Chairman of the board.
• Deutsche Gesellschaft für Mauerwerks- und Wohnungsbau e.V. (DGfM)coreStrategic or Co-development PartnerThe German Society for Masonry and Housing Construction. The Bundesverband Kalksandsteinindustrie is a member and participates in industry advocacy through this organization. Dr. Hannes Zapf serves as a board member representing the association's interests in housing policy discussions, including at the annual Wohnungsbau-Tag.
• Baugewerbe-Verband NiedersachsenminorGTM or Marketing PartnerThe Lower Saxony Construction Industry Association. Its representative Matthias Wächter participated in the Minister-President's factory visit at Emsländer Baustoffwerke, representing the interests of construction companies that use Kalksandstein products.
• Bundesverband Baustoffindustrie Steine Erden e.V. (bbs)majorStrategic or Co-development PartnerFederal Association of the Building Materials Industry. Collaborates with the Kalksandstein industry on political advocacy for CO2 recarbonatization recognition at the federal level in Berlin and Brussels.
• Universität Kassel - Fachgebiet Werkstoffe des Bauwesens und BauchemiemajorStrategic or Co-development PartnerThe University of Kassel's Department of Building Materials and Construction Chemistry, led by Prof. Dr. Bernhard Middendorf. Conducts research on CO2 storage capacity of Kalksandstein and recarbonatization. Professor Middendorf is a member of the scientific advisory board of Forschungsvereinigung Kalk-Sand e.V.
• Dr. Sebastian Pohl / LCEE (Life Cycle Engineering Experts)majorStrategic or Co-development PartnerLCA expert from Darmstadt who co-authored the holistic sustainability assessment study (Ganzheitliche Nachhaltigkeitsbewertung) for Kalksandstein multi-family buildings, demonstrating DGNB, BNG, and QNG compliance.

Scale indicators6 records

Recent moves6 records

Expansion highlights5 records

Direct peers

• Qualitätsgemeinschaft Mauerwerksprodukte e.V. (QMP): Cross-material masonry quality association in which BV KSI holds membership; performs overlapping certification and quality-monitoring functions for masonry producers including Kalksandstein, creating shared technical ground and joint advocacy.
• Bundesverband Porenbetonindustrie e.V. German autoclaved aerated concrete (AAC/Porenbeton) industry trade association serving the same architect/planner and developer audience with a competing masonry wall product, performing analogous Gütesiegel, EPD and code-compliance work.
• Bundesverband der Deutschen Ziegelindustrie e.V. German clay-brick industry trade association running parallel standardization, technical consulting, sustainability and policy advocacy for the closely substitutable clay masonry category that directly competes with Kalksandstein in multi-story residential construction.
• Deutsche Gesellschaft für Mauerwerks- und Wohnungsbau (DGfM) e.V. Umbrella society for masonry and housing construction in Germany of which BV KSI is a member; competes for representational authority at Wohnungsbau-Tag and on housing policy in Berlin, making it both a coordination partner and an institutional peer.

Emerging players

• Holzbau Deutschland – Bund Deutscher Zimmermeister im Zentralverband Deutsches Baugewerbe: Trade association for German timber construction contractors and carpenters actively promoting Holz/Hybridbau as a carbon-storing alternative to masonry in the multi-family segment where Kalksandstein is the current market leader.

Others

• Xella International GmbH: Europe's largest autoclaved aerated concrete manufacturer and a major Kalksandstein parent/operator in Germany; comparable as a large private-equity-owned building-materials producer operating in the same residential-construction value chain as BV KSI's members.
• H+H Deutschland GmbH: One of the leading Kalksandstein manufacturers in Germany and a member of BV KSI, whose Managing Director (Markus Blum) sits on the Bundesverband board; a useful peer for understanding the manufacturer economics that fund the association.

Broad incumbents

• Bundesverband Baustoffindustrie – Steine und Erden e.V. (bbs): Federal umbrella for the German building-materials, stones-and-soils industry; a long-standing coordination partner of BV KSI on recarbonatization advocacy and broader construction policy, but representing many materials beyond Kalksandstein.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat5 records

Key risks6 records

Key highlights7 records

Customer concentration

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Revenue estimate

Valuation estimate

Number of profiles

Profiles3 records

Subsidiaries2 records

Funding overview

Funding rounds

Investors

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M&A

Investments

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Frequently asked questions about Bundesverband Kalksandsteinindustrie e.V.