GRÖMO GmbH & Co. KG

What GRÖMO GmbH & Co. KG does

GRÖMO GmbH & Co. KG is a Marktoberdorf, Germany-based manufacturer of metal roof drainage components, founded in 1888 and operating as a unit within the RÖSLE GROUP. The company produces approximately 3,500 articles spanning gutters, downpipes, elbows, hoppers, rainwater standpipes, roof accessories, and chimney protection, fabricated in zinc, copper, aluminum, stainless steel, and coated steel. Its product portfolio includes the premium color-coated ALUSTAR sub-brand and the DUOFALZ aluminum band/sheet line, alongside a newer Design product sub-line that targets architecturally visible drainage applications.

The company's go-to-market is exclusively B2B through specialist trade channels: building material wholesalers, specialist dealers, and cooperative purchasing groups, with EUROBAUSTOFF as the most prominent channel partner (five-time consecutive Top Supplier). End-customers are professional metal roofers and tin smiths (Spengler) who install drainage systems on residential and commercial buildings. Pricing follows a published price list with a €30 surcharge for orders below €200 net and pass-through adjustments for raw material price moves exceeding 20% over more than four months. Custom/bespoke productions are quoted on a separate basis and delivered ex-works from Marktoberdorf. The company is DIN EN 612 and DIN EN 12056-3 compliant, with outlet performance independently verified by the Technical University of Munich.

GRÖMO monetizes via hardware sales of standardized catalog items and higher-margin custom fabrications, with no subscription, software, or service revenue streams disclosed. The business holds the GRÖMO Spenglerstern quality mark, the German Brand Award in Gold (2016), repeated EUROBAUSTOFF Top Supplier recognition, the German Design Award 2024, and ZVDH Zert Green Building certification, supporting a premium positioning in the DACH roof drainage market. Management is led by Henning Klempp (Managing Director since 2017), and the company shows no external institutional investors, no M&A activity, and no disclosed headcount.

Name

GRÖMO GmbH & Co. KG

Legal name

Grömo GmbH & Co. KG

Website

https://groemo.com

Company type

Private

Founded year

1888

Operating status

Operating

Headcount range

11–50 employees

Short description

GRÖMO GmbH & Co. KG is a 130+ year-old German manufacturer of metal roof drainage components, serving professional metal roofers and building material wholesalers across the DACH region via a ~3,500-article catalog spanning gutters, downpipes, and accessories.

Ownership category

akta.pro rank

Product category

Roof Drainage Components

NAICS

Ornamental and Architectural Metal Products Manufacturing (33232), Aluminum Sheet, Plate, and Foil Manufacturing (331315)

SIC

Fabricated Structural Metal Products (3440)

akta.pro primary industry

Gutters, Downspouts & Rainwater Systems (IMADAFAM)

Keywords

• Roof drainage components
• Metal gutter systems
• Rainwater downpipe accessories
• Color-coated aluminum drainage
• Spengler roof accessories

Headquarters

HQ city

Marktoberdorf

HQ country

Germany

HQ region

Europe

Offices1 record

Markets served

GTM type

B2B

Offering type

Hardware or Manufacturing

Cost components

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

Revenue model

1. Roof drainage component sales: GRÖMO generates revenue primarily through the manufacture and sale of professional roof drainage components (gutters, downpipes, accessories) in various metals. Products are sold to specialist trade, wholesalers, and building materials distributors. Pricing follows a published price list with surcharges for orders under €200 net.

Pricing tiers

Go-to-market motion1 record

Distribution channels3 records

Marketing channels6 records

Core offering

GRÖMO manufactures and sells metal roof drainage components, including gutters, downpipes, outlets, elbows, hoppers, rainwater standpipes, pipe accessories, roof accessories, and chimney protection, primarily in zinc, copper, aluminum, stainless steel, and coated steel. The company offers approximately 3,500 articles plus custom (Sonderanfertigungen) productions, marketed under the GRÖMO brand and the GRÖMO ALUSTAR and DUOFALZ sub-lines for color-coated and dual-coated aluminum applications. Products are sold exclusively through specialist building material trade and the EUROBAUSTOFF cooperative.

Product overview

GRÖMO is a specialist manufacturer of roof drainage systems (Dachentwässerung) based in Marktoberdorf, Germany, with over 130 years of experience in metalworking. The company produces approximately 3,500 articles including gutters, downpipes, and accessories in various metals (zinc, copper, aluminum, stainless steel). The product portfolio centers on core drainage components organized by category: Rinnenwinkel & Zubehör (gutter corners/accessories), Stutzen & Wasserfangkästen (outlets/hoppers), Bögen (elbows), Rohrzubehör (pipe accessories), Regenstandrohre (rainwater standpipes), Dachzubehör (roof accessories), and Kaminschutz (chimney protection). The premium sub-brand GRÖMO ALUSTAR offers color-coated aluminum drainage systems in 11 colors for architectural customization, while the DUOFALZ line provides aluminum band and sheet metal products with dual SX/TX coatings. Design-Produkte represent a modern design-focused product line combining functionality with contemporary aesthetics.

Differentiator

Problem solved

Functional benefit

Brands

• GRÖMO ALUSTAR: Color-coated aluminum roof drainage product line offering roof gutters, downpipes, and accessories in various colors and finishes.
• DUOFALZ

Products and services

• GRÖMO ALUSTAR Color-coated aluminum roof drainage product line offering customizable roof gutters, downpipes, and accessories in 11 nature-inspired colors for modern architecture matching building facades.
• Rinnenwinkel & Zubehör (Gutter Corners and Accessories) Gutter corners and accessories including gutter corners, end caps, quarter spheres, expanders, connectors, hooks, fascia board holders, leaf sieves, and leaf grilles for roof drainage installations.
• Stutzen & Wasserfangkästen (Outlets and Hoppers) Outlets and hoppers including plug-in gutter outlets (with clamping spring), diagonal gutter outlets, Oberstdorfer gutter outlets, soldering gutter outlets, outlet spouts, adjustable outlets, gutter extensions, flat-roof and design hoppers, and related hopper accessories.
• Bögen (Elbows) Elbows for rainwater downpipe systems including pipe elbows, swan necks (Sockelknie), and articulated elbows (Gliederbögen).
• Rohrzubehör (Pipe Accessories) Pipe accessories including rainwater downpipe flaps, water collectors, water distributors, rain barrels, leaf catchers/traps, odour traps, sliding sleeves, flat-roof branches, pipe branches, standpipe caps, adapter cones, reducers, plug-in sleeves, pipe brackets, beads, downpipe stopgaps, and LED downpipe lighting.
• Regenstandrohre (Rainwater Standpipes) Rainwater standpipes including standpipes themselves, sealing elements, standpipe brackets, and standpipe accessories for vertical downpipe runs.
• Dachzubehör (Roof Accessories) Roof accessories including antenna sockets (Antennendurchgang), ventilator fans, outlet vents (Dunstrohre), stud caps (Hauerbuckel), roof ridge air vents, and pigeon guards (Taubenschutz).
• Kaminschutz (Chimney Protection) Chimney protection products including chimney hoods (Kaminhaube), chimney flashings (Kaminverwahrungen), and overhang plug-in frames (Überhangsteckrahmen).
• DUOFALZ Band- und Tafelbleche (Aluminum Band and Sheet) Dual-sided coated aluminum band and sheet products (SX and TX surfaces) for roofing and facade applications in metalworking. Available in widths of 500, 650, and 1000 mm, EN AW 3005 H41 alloy, with a 40-year warranty on material and coating.
• Design-Produkte (Design Product Line) Modern design-line products combining functional drainage with contemporary aesthetics for visible architectural elements, including design water collectors, design rain barrels, design downpipe brackets, and design flat-roof hoppers.
• LED-Fallrohrbeleuchtung (LED Downpipe Lighting) Backlit rainwater downpipes that combine functional roof drainage with architectural facade illumination for modern building exteriors.

Quantifiable outcome

• Norm compliance verified by Technical University of Munich — GRÖMO plug-in gutter outlets fully meet DIN EN 12056 part 3 requirements
• +1 more outcomes

Segments2 records

Ideal customer profiles2 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature6 records

Partnerships

Five partnerships are on record, tiered core and minor.

• EUROBAUSTOFFcoreChannel Partner/ Reseller/ Distributor · 25 November 2024GRÖMO is a recognized 'Top Supplier' (Toplieferant) of EUROBAUSTOFF, one of the largest building material purchasing cooperatives in Europe, serving specialist trade and building material dealers. GRÖMO has received this award five times consecutively, most recently in November 2024.
• ALLGÄU Tourismus- und WirtschaftsmarkeminorGTM or Marketing Partner · 18 February 2020GRÖMO entered a brand partnership with the ALLGÄU tourism and economic brand, highlighting GRÖMO's roots in the Allgäu region of Bavaria and emphasizing local identity and regional economic ties.
• RÖSLE GROUPcoreStrategic or Co-development PartnerGRÖMO is part of the RÖSLE GROUP, a diversified manufacturing group based in Marktoberdorf, Allgäu. The group includes RÖSLE (kitchen utensils), UTM, and other companies. GRÖMO participates in group-wide initiatives including employee events, sustainability programs, and shared HR/recruitment platforms.
• FDF (Fachvereinigung Dachentwässerung)minorGTM or Marketing PartnerGRÖMO hosted a factory tour for around 100 FDF members in May 2026 as part of the FDF's spring general assembly meeting. FDF is the specialist association for roof drainage in Germany.
• Host Europe GmbHminorOthersGRÖMO's website is hosted externally by Host Europe GmbH, c/o WeWork, Friesenplatz 4, 50672 Köln, Germany. A data processing agreement (DPA) is in place per GDPR requirements.

Scale indicators5 records

Recent moves6 records

Expansion highlights5 records

Direct peers

• Rheinzink: Rheinzink is a leading European manufacturer of zinc roof drainage systems, gutters, and downpipes, making it a closely comparable direct competitor to GRÖMO in premium metal roof drainage across the DACH region.
• PREFA: PREFA manufactures aluminum roof systems, gutters, downpipes, and accessories with a comparable premium brand positioning in Europe; its color-coated aluminum line parallels GRÖMO's ALUSTAR range.
• VMZINC (Umicore): VMZINC (part of Umicore) is a European producer of zinc roof and facade systems including rainwater goods, offering similar premium zinc and coated metal drainage products to specifiers and installers across Europe.
• Zambelli: Zambelli produces metal roof drainage systems including gutters, downpipes, and accessories, serving the same German-speaking trade market as GRÖMO with comparable product breadth and Spengler-focused distribution.
• Klöber: Klöber is a German manufacturer of roofing accessories and components supplying the professional roofing trade, with overlap into roof drainage and roof-related metalwork relevant to GRÖMO's installer base.

Broad incumbents

• ACO: ACO is a much larger, broader building-water-management group producing drainage systems, gutters, and rainwater products across commercial and residential segments, providing an incumbent comparable in adjacent drainage categories.
• Roto Frank: Roto Frank is a broader German building products manufacturer with adjacent ranges in roofing accessories and building envelope components, providing a comparable diversified European building-product incumbent peer.
• KME (Aurubis): KME is a major European copper and copper-alloy products manufacturer whose building-applications range includes copper rainwater goods, comparable to GRÖMO's copper product lines from an upstream supply perspective.

Emerging players

• Alutec (Pipelife): Alutec produces aluminum rainwater systems (gutters and downpipes) with a color-coated offering competing against GRÖMO ALUSTAR at a more value-oriented price point in European markets.

Regional players

• Sita Bauelemente: Sita is a German manufacturer of flat-roof drainage and roof drainage components, with overlap to GRÖMO's flat-roof hopper (Wasserfangkasten) and roof-drainage accessory categories in the German market.

Market position

Strengths4 records

Weaknesses4 records

Competitive moat4 records

Key risks6 records

Key highlights7 records

Customer concentration

• YouTubeyoutube.com/user/GROEMOGmbH
• Facebookfacebook.com/Groemo
• LinkedInlinkedin.com/company/groemo
• Instagraminstagram.com/groemo.de

Compliance11 records

Revenue estimate

Valuation estimate

Number of profiles

Profiles3 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 GRÖMO GmbH & Co. KG