Press Release – 11. October 2023

Feldhaus Klinker and Sievert conclude 10-year warranty partnership

Feldhaus Klinker, the internationally operating clinker brick and brick slip factory from Germany, and Sievert, a leading European supplier of premium building materials, have entered into a warranty partnership with the aim of guaranteeing façade safety.


The guarantee applies to brick slip bonding on monolithic masonry as well as on concrete and precast concrete elements. It covers a total of 12 clinker brick slip product lines from Feldhaus Klinker and 15 system products from Sievert's akurit and quick-mix product brands.

"Usually, manufacturers are only liable for their own products. In this case, however, we are jointly responsible for the complete structure - also thanks to coordinated materials. This offers real added value for our customers," says Ingo Lehnardt, Head of Construction and Application Consultancy at Sievert Baustoffe.

"The basis for this warranty partnership is the long-standing partnership between Feldhaus and Sievert. Together, we have already successfully completed many projects in recent years," adds Jörg Breier, Managing Director at Feldhaus Klinker.

Commitment of both partners

With the warranty partnership, the two companies undertake to be liable for defects in the façade construction for a total of ten years, provided that the Feldhaus clinker brick slips have been professionally installed using Sievert system products. This warranty covers the protection of the façade against leaching and efflorescence as well as the frost and weather resistance of the materials supplied by the warranty partners as a complete system. Leaching and efflorescence in particular can quickly make clinker brick façades look unsightly. With SECON®, Sievert has developed and patented a binding agent technology that reliably prevents leaching and efflorescence from the joint mortar. The technology is used in the S-FM joint grout from Sievert's quick-mix brand and the FM-R brick slip joint grout from the akurit brand.

The S-FM joint mortar from quick-mix and the FM-R brick slip joint mortar from akurit are optimally matched to the pointing of Feldhaus clinker brick slips. (Image source: Feldhaus Klinker)

"We have subjected the materials from Feldhaus Klinker and Sievert to comprehensive joint tests. Today, we can offer a high level of security with the guarantee in an area where there are no comparable agreements," explains Michael Wagner, Head of Planning and Project Management at Sievert Baustoffe.

The demand for clinker brick slips on façades is currently as high as ever. It can be observed that more and more building owners and planners are requesting the application on monolithic masonry as well as on concrete and precast concrete elements. Feldhaus offers its customers a wide range of colours as well as smooth and rustic surfaces. With a variety of formats and thicknesses, broken or sharp edges, there are no limits to the design possibilities. Corner angles and stretcher or lintel angles ensure that the façade looks like a double-skin brickwork.


The 10-year guarantee agreement can be requested from Sievert using the following contact details:

Phone: +49 4191 808944


Image source header: Nicky Seidenglanz

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