FDT Flachdach Technologie

What FDT Flachdach Technologie does

FDT Flachdach Technologie GmbH is a Mannheim, Germany-based manufacturer specializing in thermoplastic flat roof waterproofing membranes and complementary roofing systems, founded in 1873 as Schildkröt Werke and operating under its current name with 1,001–5,000 employees. The company's core technology centers on two proprietary membrane chemistries: Rhepanol, a polyisobutylene (PIB) system available in hfk (hot-air weldable), hfk-bs (self-adhesive), and hg (loose-laid/green roof) variants; and Rhenofol, a polyvinyl chloride (PVC) system available in CV, CVL, CG, and CGv variants with polyester reinforcement. Supporting products include FDT Solarfix Universal (a solar panel mounting system for flat roofs, extended in 2026 to support Elevate EPDM and TPO membranes), walkway plates, termination profiles, sealants, and calculation tools for wind load, drainage, and snow guards. The product line is backed by Environmental Product Declarations and the ROOFCOLLECT circular-economy recycling program.

FDT generates revenue primarily through hardware sales of membranes, accessories, and Solarfix mounting systems, distributed via a hybrid motion combining direct regional specialist consultants (Fachberater), a Fachhandel specialist-trade channel, and post-acquisition access to the global Elevate (formerly Firestone Building Products) network inherited from parent company Holcim, which signed the acquisition in February 2023. Customers are predominantly business-to-business, segmented across building owners and developers (the primary segment for new build and renovation), architects and planners (who specify membranes), roofing contractors (Verarbeiter, who install them and are supported via training programs), and specialist trade distributors (Fachhandel). Pricing is not publicly disclosed but is administered through consultant-mediated price lists with reported standard ~3% annual increases and ~10% increases on discontinued SKUs; multi-year contract cadence is implied.

The company maintains formal commercial infrastructure in Germany (Mannheim HQ), Benelux (Zaventem), and France (Osny), with documented project references extending into the Netherlands, Austria, Turkey, and Thailand. Its customer logo base spans logistics (e.g., 7,300 m² Mönchengladbach, 30,000 m² Witt Weiden), retail (22,600 m² InCenter Landsberg with integrated photovoltaics), aviation (Lufthansa Aviation Center Frankfurt), education (Thomas-Morus-Realschule, TUM Campus), manufacturing (EK Pack Folien), and hospitality. Following the 2023 Holcim acquisition, FDT operates as a wholly-owned subsidiary within Holcim's Solutions & Products division, which targets 30% of group net sales by 2025 under the parent's 'Strategy 2025 – Accelerating Green Growth' plan.

Name

FDT Flachdach Technologie

Legal name

FDT Flachdach Technologie GmbH

Website

https://fdt.de

Company type

Private

Founded year

1873

Operating status

Operating

Headcount range

1,001–5,000 employees

Short description

FDT Flachdach Technologie GmbH is a Mannheim-based manufacturer of Rhepanol PIB and Rhenofol PVC flat roof waterproofing membranes, serving building owners, architects, planners, and roofing contractors across DACH, Benelux, France, and select export markets. Now operating as part of Holcim.

Ownership category

akta.pro rank

Headquarters

HQ city

Mannheim

HQ country

Germany

HQ region

Europe

Offices3 records

Markets served

GTM type

B2B

Offering type

Hardware or Manufacturing

Cost components

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

Revenue model

1. Roofing Membrane Sales: Sale of proprietary Rhepanol (PIB) and Rhenofol (PVC) flat roof waterproofing membranes. Revenue generated from membrane sales to distributors, specialist trade partners, and directly to roofing contractors.
2. Accessories and Complementary Products: Sales of roofing accessories including walkway plates, termination profiles, sealants, and installation materials compatible with FDT membrane systems.
3. Solar Mounting Systems: FDT Solarfix Universal solar panel mounting solutions including mounting hardware and sealing components.

Pricing tiers

Go-to-market motion1 record

Distribution channels3 records

Marketing channels5 records

Core offering

FDT manufactures and supplies thermoplastic flat-roof waterproofing membranes under two proprietary brands — Rhepanol (PIB-based) and Rhenofol (PVC-based) — available in multiple variants for mechanical fastening, loose-laid ballast, and fully bonded installation. The portfolio also includes the FDT Solarfix Universal solar mounting system, walkway plates, sealing accessories, and calculation tools, targeting commercial, industrial, and residential flat-roof new-build and renovation projects.

Product overview

FDT Flachdach Technologie GmbH is a flat roof waterproofing specialist offering two main roofing membrane systems: Rhepanol (PIB-based polyisobutylene membranes) and Rhenofol (PVC-based polyvinyl chloride membranes), both available in multiple variants for different installation methods (mechanically fastened, loose-laid with ballast, fully adhered). The portfolio includes specialized sub-products like hfk (hot-air weldable with fire protection), hg (loose-laid for green roofs), and CV/CVL/CG/CGv variants for PVC applications. The company also provides solar mounting solutions through FDT Solarfix Universal, compatible with all major flat roof membrane types including third-party EPDM and TPO products. Supporting products include walkway plates, accessories, and calculation tools for wind load and drainage. The company operates as a member of Holcim following acquisition in 2023.

Differentiator

Problem solved

Functional benefit

Brands

• Rhepanol: Polyisobutylen (PIB) based roofing membranes for flat roofs. Product line includes Rhepanol hfk, Rhepanol hfk-bs, Rhepanol hg, and Rhepanol fk variants.
• Rhenofol
• FDT Solarfix Universal

Products and services

• Rhepanol Dachbahnsystem PIB (polyisobutylene) based flat-roof waterproofing membrane system providing extreme longevity and sustainability certifications. Designed for new build and renovation of commercial, industrial, and residential flat-roof applications, with compatibility for green roofs and solar installations.
• Rhenofol Dachbahnsystem PVC (polyvinyl chloride) based flat-roof waterproofing membrane system positioned as efficient and economical for new construction and renovation projects across commercial, industrial, and residential buildings.
• FDT Solarfix Universal Universal solar mounting system for flat roofs, compatible with Rhepanol (PIB), Rhenofol (PVC), EPDM (RubberGard), and TPO (UltraPly) membranes. Supports roof pitches up to 20 degrees and is targeted at installers seeking to integrate photovoltaic installations directly on existing membrane surfaces.
• Rhepanol Dachzubehör Accessories product line for Rhepanol roofing membranes including walkway plates, adhesive and sealing compounds, and termination profiles, designed to complement the Rhepanol membrane installation.
• Rhenofol Dachzubehör Accessories product line for Rhenofol PVC roofing membranes including walkway plates, paste, and sealing materials, designed to complement the Rhenofol membrane installation.
• Rhepanol O.R.G Acid Protection Acid protection membrane system based on Rhepanol chemistry, designed for specialized industrial roofing applications where chemical resistance is required.

Quantifiable outcome

• 50+ years proven durability of Rhepanol membranes documented in practice
• +1 more outcomes

Named customers11 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

Feature4 records

Scale indicators3 records

Recent moves7 records

Expansion highlights6 records

Direct peers

• Sika Sarnafil: Sika's Sarnafil division is one of the world's leading single-ply PVC and FPO roofing membrane brands, directly competing with FDT's Rhenofol line across European commercial new-build and re-roofing projects with overlapping installer/specifier channels.
• Carlisle Construction Materials: Carlisle is the largest U.S. single-ply EPDM and TPO membrane manufacturer and a meaningful European player through Carlisle SynTec, competing head-to-head with FDT in large commercial and logistics flat-roof waterproofing.
• Bauder: Bauder is a leading German flat-roof systems manufacturer offering bituminous, EPDM, and PVC membranes plus green-roof and solar-mounting systems, making it a direct domestic German peer to FDT across both chemistry and solar-integration segments.
• Renolit: Renolit produces alkorplan and similar single-ply PVC and ECB roofing membranes used across European commercial flat roofs, directly comparable to FDT's Rhenofol line on chemistry, application, and installer base.
• Protan: Protan is a Nordic manufacturer of single-ply PVC and TPO roofing membranes serving commercial and industrial flat roofs in Northern and Western Europe, directly comparable to FDT on product format and end markets.
• Siplast: Siplast is a European manufacturer of SBS-modified bitumen and single-ply roofing/waterproofing membranes serving commercial flat-roof projects, directly comparable to FDT in the waterproofing membranes category.

Broad incumbents

• Elevate (Holcim): Elevate is the Holcim roofing brand (formerly Firestone Building Products) offering EPDM and TPO membranes plus integrated PV mounting. It is now the sister brand to FDT inside Holcim's Solutions & Products division, overlapping in product but broader in portfolio and geography.
• IKO: IKO is a global manufacturer of roofing and waterproofing systems including bituminous, single-ply, and EPDM membranes. It competes with FDT in European commercial flat-roof projects as part of a broader portfolio spanning multiple chemistries.
• Johns Manville: Johns Manville (Berkshire Hathaway) produces a broad portfolio of EPDM, TPO, and PVC roofing membranes and insulation systems serving commercial flat roofs across Europe and globally, overlapping with FDT on single-ply membranes while being much broader in category scope.
• Mapei: Mapei manufactures roofing membranes (including the Polyglass and Mapeplan ranges) as part of its broader construction-chemicals portfolio, competing with FDT in commercial flat-roof waterproofing while operating a far larger and more diversified business.

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

Profiles4 records

Funding overview

Funding rounds

Investors

Funding detail is available on the Subscription and Enterprise plan.Contact sales →

M&A

Investments

M&A and investment is available on the Subscription and Enterprise plan.Contact sales →

Frequently asked questions about FDT Flachdach Technologie