The Jacobi Walther J 12 is a high-quality flat roof tile that impresses with its modern design and high functionality. With its flexible coverage length adjustment and robust construction, this tile is suitable for both new buildings and roof renovations. The J 12 combines aesthetics and durability, making it the ideal choice for a wide variety of roof constructions.

Technical specifications of the Jacobi Walther J 12

  • Size: approx. 30.4 x 44.5 cm
  • Cover length range: 33.3 to 36.5 cm
  • Cover width: 24.6 cm
  • Weight per piece: approx. 4.4 kg
  • Quantity required per m²: approx. 11.1 to 12.2 pieces
  • Standard roof pitch: ≥ 22°

Design and aesthetics

The Jacobi Walther J 12 tile is distinguished by its elegant design, which visually enhances the roof. Its smooth, fine surface finish creates an attractive appearance that integrates harmoniously into various architectural styles. The tile is available in a wide range of colors, including high-quality, avant-garde glazes that offer an additionally appealing surface finish.

Special design features

  • Elegant and modern design for a uniform and harmonious roof surface
  • Generous adjustment range for easy modifications during installation
  • Available in a wide variety of colours and glazes

Advantages of the Jacobi Walther J 12

  • Cost-effectiveness: Low brick requirement of approximately 11.1 to 12.2 bricks/m²
  • Flexibility: Suitable for various roof pitches from 22°
  • Aesthetics: Modern design that visually enhances any roof
  • Weather resistance: High resistance to rain, frost and other weather conditions.
  • Durability: Robust construction for a long service life

Assembly and processing

The Jacobi Walther J 12 tile can be installed quickly and easily thanks to its generous adjustment range in the coverage length (up to 32 mm) and its stable fit. The tile is particularly suitable for roof renovations, as it adapts flexibly to existing roof structures without requiring extensive cutting work.

Assembly steps

  1. Inspection of the roof substructure and preparation of the battens
  2. Precise alignment of the first row of bricks at the eaves
  3. Shear-like laying pattern with sufficient overlap to ensure rainproofness
  4. Use of suitable fastening materials for wind protection
  5. The laying is completed with matching shaped tiles at the ridge and verges.

Applications

  • New buildings: Ideal for modern and traditional roof designs
  • Renovations: Particularly suitable for re-roofing existing roofs
  • Various building types: Suitable for residential buildings, public buildings and commercial buildings

Care and maintenance

The Jacobi Walther J 12 is easy to maintain and durable. Thanks to its robust surface, the tile remains functional and visually appealing even after years. Regular inspections and simple cleaning measures help to extend the roof's lifespan and maintain its functionality.

Compatibility with CLEVER-TILE ®

Whether our system is suitable for the Jacobi Walther J 12 roof tile depends on the cover dimensions, tile geometry and installation requirements. The flexible ends of our replacement tile are shaped to the neighbouring tiles during installation. The model name alone does not confirm suitability.

Advantages of CLEVER-TILE ®

  • Universal fit: Compatible with most roof tile types
  • Roof-friendly: Even weight distribution in the roof structure
  • Easy assembly: Quick and easy to install
  • Weather resistance: Reliable protection against rain and snow
  • Robust construction: Made from durable materials

Conclusion: Jacobi Walther J 12 and CLEVER-TILE ® – The ideal combination

The Jacobi Walther J 12 offers an outstanding solution for a wide range of roofing requirements. With its flexibility, aesthetically pleasing design, and robust construction, it is an excellent choice for both new builds and renovations. Combined with CLEVER-TILE ®, your roof will be functional, sustainable, and visually appealing.

Referenced terms and sources

This existing glossary article was reviewed and approved on 14 October 2026. Time-sensitive information still refers to its original publication context unless the article states otherwise. It does not replace installation instructions or confirm compatibility with a particular roof tile model.

Machine-assisted translation. The German version remains available.

Data sheet and installation guideOriginal source