KLEMENS OTT

What KLEMENS OTT does

KLEMENS OTT GmbH is a family-owned German roofing and metalworking contractor (Dachdecker und Spengler) headquartered in Miltenberg, Bavaria. Founded in 1960 by Klemens Ott, with family roots in the slate roofing trade dating to 1888, the company is now in its fifth generation of family ownership and manages 60+ employees. It operates five core service lines: pitched roofs (Steildach), flat roofs (Flachdach), metal roofs (Metalldach), green roofs (Gründach), and facade cladding (Fassaden), supported by specialized offerings in leak detection (Leckageortung) using electronic flow measurement and smoke gas analysis, and industrial roofing services (Industrieservice). Customers span private residential, public institutions (e.g., Goethe-Universität Frankfurt, St. Nikolaus Schule, Stadtbau Aschaffenburg), and commercial/industrial enterprises (WIKA, Toom Zentrallager, FRAPORT, Leica, Rauch Möbelwerk) across the Rhein-Main region and Bavarian Untermain.

The technical stack comprises three waterproofing technologies (bituminous, Kunststoff, and liquid plastics), in-house metal fabrication with a CNC-controlled Schechtl Kantbank, and digitalized paperless construction-site operations since 2020. The company holds the five-star Meisterhaft certification, 100 Top Dachdecker membership, Zert-Bau Präqualifizierung for public-sector tenders, and is a VELUX certified partner. Leadership is jointly held by Peter J. Ott (managing director since 1990) and Jonathan Ott (third-generation managing director since August 2022), with Philipp Karstens as Prokurist (since 2022). Operations are conducted from a single headquarters (Benzstraße 11, Miltenberg) expanded in 2024 through acquisition of a neighboring property.

Revenue is generated through project-based professional services, with custom pricing per project across roofing, waterproofing, facade, and VELUX window installation. The go-to-market model is direct-to-consumer via website, phone, email, and an embedded VELUX configurator, supported by distribution within the 100 Top Dachdecker referral network and earned media in regional press. No public revenue figures have been disclosed; investor signals are not applicable as the company is a privately held GmbH with no external funding rounds.

Name

KLEMENS OTT

Legal name

KLEMENS OTT GmbH

Website

https://klemensott.de

Company type

Private

Founded year

1960

Operating status

Operating

Headcount range

1–10 employees

Short description

KLEMENS OTT GmbH is a family-owned German roofing and metalworking contractor headquartered in Miltenberg, Bavaria, serving commercial, industrial, and residential customers in the Rhein-Main region with pitched, flat, metal, and green roofs plus facade cladding. Founded 1960, now in its fifth generation with 60+ employees.

Ownership category

akta.pro rank

Product category

Commercial Roofing and Facade Contracting Services

NAICS

Roofing Contractors (23816), Siding Contractors (238170)

SIC

Asphalt Paving & Roofing Materials (2950)

akta.pro primary industry

Roofing Systems & Waterproofing (Membranes, Shingles, TPO/EPDM, Liquid-Applied) (IMAFAMAA)

akta.pro secondary industries

Flat Roof Repair & Membrane Restoration (TPO/EPDM/PVC/Built-Up) (HSAGAKAE), Metal Roofing Systems (IMADAFAB), Roof Coatings & Liquid-Applied Roofing (IMADAFAK), Roof Repair & Leak Remediation (HSAPAKAB)

Keywords

• Commercial roofing services
• Roof waterproofing systems
• Facade cladding installation
• Metal roof installation
• Green roof systems

Headquarters

HQ city

Miltenberg

HQ country

Germany

HQ region

Europe

Offices1 record

Markets served

GTM type

B2B

Offering type

Services

Cost components

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

Revenue model

1. Roofing and waterproofing services: The primary revenue stream consists of service fees for roofing, roof waterproofing, and roof renovation projects for both private residential and commercial/industrial customers. Projects range from small repairs to large-scale commercial roof installations. Revenue is project-based and typically one-time per contract.
2. Facade cladding and design services: Revenue is generated through facade design, material supply, and installation services for commercial and residential buildings, including specialized cladding with fiber cement, aluminum, zinc, copper, and wood materials.
3. VELUX window sales and installation: As a VELUX partner, the company sells and installs VELUX roof windows, offering configuration through the VELUX configurator and individual consultation.

Pricing tiers

Go-to-market motion2 records

Distribution channels3 records

Marketing channels6 records

Core offering

KLEMENS OTT GmbH is a family-owned roofing and metalworking contractor based in Miltenberg, Bavaria, delivering complete roof, facade, and waterproofing services across the Rhein-Main region. The company operates across five core service lines — pitched roofs (Steildach), flat roofs (Flachdach), metal roofs (Metalldach), green roofs (Gründach) and facade cladding (Fassaden) — for both commercial/industrial and private residential customers. It runs its own metal fabrication workshop, performs leak detection (Leckageortung), delivers industrial roofing services (Industrieservice) and sells/installs VELUX roof windows via an online configurator.

Product overview

KLEMENS OTT GmbH is a traditional family-owned roofing and metalworking contractor operating a multi-service portfolio organized around five core product lines: Steildach (pitched/sloped roofs), Flachdach (flat roofs), Metalldach (metal roof systems), Gründach (green roofs), and Fassaden (facade cladding). Services are delivered as craft/trade offerings, not as software products. Supporting service offerings include leak detection (Leckageortung) using electronic and smoke gas methods, and industrial roofing services (Industrieservice) for warehouse and production environments. Digital touchpoints include the VELUX Dachfensterkonfigurator (an embedded VELUX tool for skylight configuration and quote requests) and an Interaktive Firmenbroschüre (interactive PDF-based company brochure). The company also provides Spengler (metalworking/loodsmasonry) services. The firm operates across commercial, industrial, and residential segments in the Rhein-Main and Bavarian Untermain regions.

Differentiator

Problem solved

Functional benefit

Products and services

• Steildach (Pitched Roof Services) Roofing services for pitched/sloped roofs covering new roof installation, re-roofing, natural slate roofing, dormer cladding, on/between/under-rafter insulation, attic floor insulation, skylight installation and replacement, roof drainage, and an emergency repair hotline. Targeted at private residential and commercial property owners in the Rhein-Main and Bavarian Untermain regions.
• Flachdach (Flat Roof Services) Flat roof services for terraces, balconies, garages, underground parking, private residential buildings, rooftop gardens, and large commercial halls. Includes installation of roof lights, daylight strips and RWA systems, plus three waterproofing technologies: bituminous, plastic and liquid plastic (Flüssigkunststoff). The company also performs leak detection on flat roofs using electronic current measurement and smoke gas analysis.
• Metalldach (Metal Roof Systems) Metal roofing systems for industrial and commercial buildings, including ALU roofs, standing seam roofs in zinc and copper, Kalzip coverings, PREFA coverings, trapezoidal sheet metal installation, sandwich elements, RWA systems, light domes and rooflights, Domico roof elements, and Rockwool Pro roof systems. Services include wind load calculation, installation planning and CAD detail drawings, supported by an in-house CNC-controlled Schechtl bending machine for custom metal parts.
• Gründach (Green Roof Systems) Green roof installation combining waterproofing, protective layer, drainage, mineral substrate, intensive/extensive greening, and drainage management. Includes assistance with government subsidies, direct grants, and fee savings through rainwater separation. Targeted at property owners seeking environmental, regulatory and aesthetic benefits.
• Fassaden (Facade Systems) Facade cladding services using fiber cement, slate, wood and wood-based materials, aluminum, cassette walls, and sandwich cladding. Features a two-stage support system with effective cold, wind and heat protection, and a ventilation layer between insulation and facade cladding for moisture control. Targeted at commercial and residential building owners.
• Industrieservice (Industrial Roofing Services) Industrial roofing services for warehouses and industrial buildings including roof maintenance, roof repair, emergency roof openings for new production equipment, acceptance-ready work, and fire protection upgrades. Services are delivered without disrupting ongoing operations using a construction-site-conforming workflow. Targeted at manufacturing, logistics, retail and institutional commercial customers.
• Leckageortung (Leak Detection Services) Leak detection services for flat roofs using electronic current measurement (Elektronenstrom-Messung) and smoke gas analysis systems (Rauchgas-Analysesystem), supporting rapid fault identification and repair. Targeted at commercial and industrial customers with large flat roofs.
• VELUX Roof Window Sales and Installation Sales and installation of VELUX roof windows, configured via the VELUX Dachfensterkonfigurator embedded on the website. Customers can configure a personalized skylight solution across multiple steps, receive an indicative total price for products and installation costs, and request a quote. Targeted at private residential and commercial property owners needing daylight/sky solutions.

Quantifiable outcome

• 40 apprentices successfully completed training, with multiple Kammersieger and one Bundessieger trained
• +1 more outcomes

Named customers8 records

Segments2 records

Ideal customer profiles2 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature4 records

Partnerships

Four partnerships are on record, tiered core.

• 100 Top DachdeckercoreStrategic or Co-development Partner · 1 January 2009Klemens Ott GmbH is a member of the 100 Top Dachdecker network, a German association of top-quality roofing companies. Members commit to high and systematized quality standards including continuous training, customer and employee surveys, and complete documentation of all work. The network provides a competitive framework among the best in the German roofing trade.
• VELUXcoreTechnology or IntegrationKlemens Ott GmbH is a VELUX certified partner and certified VELUX window installer. The company offers the VELUX Dachfensterkonfigurator (roof window configurator) on its website, enabling customers to configure roof windows and request quotes. VELUX provides the configurator technology and brand, while the company provides installation services.
• Meisterhaft BauencoreStrategic or Co-development PartnerThe company holds the highest (5-star) Meisterhaft certification, a quality certification system for construction companies in Germany. The certification requires proving competence, commitment, quality, and continuous employee training through official testing institutes.
• Zert-Bau (Präqualifizierung)coreStrategic or Co-development PartnerThe company is pre-qualified through Zert-Bau, a pre-qualification system for construction companies that verifies suitability for public sector contracts in accordance with § 8 VOB/A requirements.

Scale indicators5 records

Recent moves7 records

Expansion highlights6 records

Others

• PREFA: Austrian manufacturer of metal roofing and facade systems in aluminum and zinc. Klemens Ott installs PREFA products as part of its standing seam metal roof offering; comparable as a European metal roofing systems supplier.
• VELUX Group: Danish manufacturer of roof windows and skylights. Klemens Ott is a VELUX certified partner that sells and installs VELUX products; comparable as a major roofing-adjacent brand active in the German market.
• ROCKWOOL: Danish manufacturer of stone wool insulation including Rockwool Pro roof systems used by Klemens Ott in its metal roofing installations. Comparable as a key building materials supplier in the German roofing ecosystem.
• Bauder: German manufacturer of bituminous, plastic, and liquid-applied roofing membranes whose systems are installed by contractors like Klemens Ott. Comparable as a key adjacent player in the same German roofing value chain.

Broad incumbents

• Saint-Gobain: French building materials conglomerate with significant roofing and facade product portfolios across Europe. Comparable broad incumbent serving commercial and residential building envelope needs similar to Klemens Ott's project mix.
• Soprema: French waterproofing specialist offering bituminous, liquid-applied, and synthetic membrane systems across Europe. Comparable to Klemens Ott's flat roof waterproofing capabilities but at manufacturer/system scale rather than local contractor.
• IKO: Belgian/Canadian manufacturer of roofing membranes, shingles, and waterproofing systems. Comparable in the same flat roof and pitched roof product categories Klemens Ott installs, but operating at manufacturer scale across multiple geographies.
• BMI Group: UK-based leading European manufacturer of roofing and waterproofing systems across bituminous, single-ply, and liquid categories. Operates broadly in the same roofing categories as Klemens Ott but at much larger scale as a manufacturer/system provider rather than local contractor.
• Sika AG: Swiss construction chemicals and building materials giant with significant roofing and waterproofing product lines. Comparable broad incumbent whose flat roof waterproofing systems are used by contractors like Klemens Ott across Europe.

Regional players

• Carlisle Construction Materials: US-based manufacturer of EPDM, TPO, and PVC roofing membranes with growing European presence. Comparable in product offering but primarily serves a different geography; useful indicator of roofing materials trends relevant to Klemens Ott's flat roof work.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat5 records

Key risks5 records

Key highlights7 records

Customer concentration

• YouTubeyoutube.com/@klemensott
• Facebookfacebook.com/klemensott
• LinkedInlinkedin.com/company/klemens-ott
• Instagraminstagram.com/klemens_ott

Revenue estimate

Valuation estimate

Number of profiles

Profiles5 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 KLEMENS OTT