Name

Kneer Sudfenster

Legal name

Kneer GmbH und Süd-Fensterwerk GmbH & Co. Betriebs-KG

Website

https://kneer-suedfenster.de

Company type

Private

Founded year

1932

Operating status

Operating

Headcount range

501–1,000 employees

Ownership category

akta.pro rank

Product category

Windows and Doors Manufacturing

NAICS

Wood Window and Door Manufacturing (321911), Metal Window and Door Manufacturing (332321)

SIC

Metal Doors, Sash, Frames, Moldings & Trim (3442)

akta.pro primary industry

Interior Doors (IMADAIAB)

Keywords

• Custom windows manufacturing
• Entrance doors fabrication
• Aluminium-wood joinery
• Energy-efficient fenestration
• Lift and slide doors

Headquarters

HQ city

Westerheim

HQ country

Germany

HQ region

Europe

Offices3 records

Markets served

GTM type

B2B and B2C

Offering type

Hardware or Manufacturing

Cost components

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

Revenue model

1. Custom Windows and Entrance Doors: B2B and B2C sales of custom-made windows and doors manufactured to individual customer specifications. Products include windows, entrance doors, lift-slide doors, mullion-transom facades. Sales exclusively through specialist dealer network and prefabricated house manufacturers. Pricing based on individual quotations.
2. Accessories and Shading Systems: Roller shutters, Venetian blinds, textile screens, insect protection, and window shutters sold as accessories to complement main window and door products.
3. Special Elements and Facades: Pfosten-Riegel (mullion-transom) facades, special elements, and custom architectural solutions for commercial and residential projects.

Pricing tiers

Go-to-market motion2 records

Distribution channels4 records

Marketing channels8 records

Core offering

Kneer Südfenster designs, manufactures, and supplies custom-made windows, entrance doors, lift-and-slide doors, and mullion-transom façades in aluminium-wood, aluminium-uPVC, uPVC, wood, and aluminium materials. Products are produced to individual customer specifications at three German plants and are sold exclusively through a nationwide qualified specialist dealer network (Fachpartnernetzwerk) and directly to prefabricated house manufacturers, with accessories such as roller shutters, venetian blinds, insect protection, and biometric entry systems offered alongside core fenestration products.

Product overview

Kneer-Südfenster is a German manufacturer of custom-made premium windows and entrance doors, operating as a full-range supplier since 1932. The company produces construction elements in six material combinations: Aluminium-Wood, Wood, Wood for historic buildings, Aluminium-uPVC, uPVC, and Aluminium. The core product portfolio includes: KS-Fenster (standard window series), KF 700/AKF 700 (energy-efficient windows with recycled materials), KS-Haustüren (entrance door series), and special elements such as HST 115 Sky Axxent lift-and-slide doors, Mullion-Transom façades, and CE-certified fire protection doors. The company also offers shading accessories (roller shutters, venetian blinds, textile screens), insect protection systems, and a door configurator tool. Products are sold exclusively through a qualified specialist dealer network across Germany, Europe, and worldwide.

Differentiator

Problem solved

Functional benefit

Products and services

• KS-Fenster (KS Windows)

Quantifiable outcome

• 330,000 windows and 7,000 front doors produced annually
• +2 more outcomes

Named customers2 records

Segments4 records

Ideal customer profiles3 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature5 records

Partnerships

Three partnerships are on record, tiered core.

• RAL Deutsches Institut für Gütesicherung und KennzeichnungcoreStrategic or Co-development PartnerPartnership for quality certification of windows, facades and entrance doors under RAL-GZ 695 standards. Involves continuous quality monitoring, testing by neutral accredited institutes, and compliance with material-independent and material-specific performance requirements.
• PEFC (Programme for the Endorsement of Forest Certification)coreStrategic or Co-development PartnerCertification ensuring sustainable forest management for wood products. Kneer-Südfenster uses PEFC-certified wood, demonstrating environmental responsibility and sustainable sourcing practices.
• Sentinel-Haus-Institut, FreiburgcoreStrategic or Co-development PartnerOnly certified product partner in windows at the Sentinel-Haus-Institute. Products proven to meet strict healthy housing requirements by ecoINSTITUT in Cologne. Supports healthy living and construction interior hygiene standards.

Scale indicators6 records

Recent moves6 records

Expansion highlights6 records

Broad incumbents

• REHAU: German polymer specialist with a major window systems division alongside broader building solutions. Overlaps with Kneer-Südfenster on uPVC/aluminium-uPVC window systems and prefab/commercial channels, but operates across many more categories outside windows and doors.

Direct peers

• Schüco: One of Europe's largest aluminium window, door and façade system manufacturers, headquartered in Germany. Closely comparable to Kneer-Südfenster on material focus, dealer/specifier channel and full-range product portfolio spanning residential and commercial fenestration.
• Finstral: South Tyrolean premium window and entrance door manufacturer with vertical integration, similar multi-material range (PVC, aluminium-wood, aluminium) and strong energy-efficiency / certification positioning across European dealer networks.
• Profine: German owner of KBE, Kömmerling and Trocal PVC profiles for windows and doors across Europe. Overlaps with Kneer-Südfenster on uPVC window categories, energy-efficient systems and dealer/specifier channel.
• Salamander Industrie-Produkte: German PVC profile and window manufacturer serving specialist fabricators and dealers in Europe. Comparable on uPVC window systems, dealer-channel distribution and mid-market positioning within the European fenestration value chain.
• Reynaers Aluminium: Belgian aluminium systems supplier for windows, doors and curtain walls sold via dealer networks across Europe. Comparable on aluminium window/door systems, project-based commercial work and emphasis on energy performance and design flexibility.
• Heroal: German manufacturer of aluminium window, door and façade systems serving dealers, architects and prefab builders. Directly comparable on material focus, project-based aluminium fenestration and B2B/specifier go-to-market.
• Internorm: Austrian premium manufacturer of windows and doors sold across Europe via specialist dealers. Closely comparable product mix (wood, aluminium-wood, uPVC), custom-build model, family-owned heritage and emphasis on energy efficiency.
• Aluplast: German PVC window system manufacturer supplying fabricators and dealers across Europe. Comparable in scale and uPVC window systems focus, though operating upstream as a profile/ systems supplier rather than integrated manufacturer of finished units.

Regional players

• Aluprof: Polish aluminium systems manufacturer with growing presence in DACH and broader Europe. Comparable on aluminium window/door/façade systems and project-based commercial/residential fenestration, though primarily anchored in Central and Eastern European markets.

Market position

Strengths4 records

Weaknesses5 records

Competitive moat6 records

Key risks6 records

Key highlights6 records

Customer concentration

• Facebookfacebook.com/KneerSuedfenster
• Instagraminstagram.com/kneer_suedfenster

Compliance3 records

Revenue estimate

Valuation estimate

Number of profiles

Profiles6 records

Subsidiaries4 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 Kneer Sudfenster