Product Archive - TOGE The Fastening Experts


The Baden-Württemberg 2023 Environmental Technology Award in the “Material Efficiency” category goes to the Würth Group’s REINFORCE AC product. The system – a joint development by Würth and TOGE Dübel – allows aerated concrete roofs to be subsequently reinforced so that they have up to 80% more load-bearing capacity.

“Load-bearing roof surfaces are a basic prerequisite for equipping buildings with photovoltaic systems – and therefore important for the energy transition. REINFORCE AC from Würth ensures that roofs can be upgraded with little effort,” says State Secretary Dr. Andre Baumann.

Awarding of the Baden-Württemberg Environmental Technology Prize 2023
From the left: Hans-Peter Trehkopf (Head of Construction Site Project Management at Adolf Würth GmbH & Co. KG), Sibylle Hepting-Hug (Head of the Climate, Sustainability, Resource Efficiency, Circular Economy Department at the Baden-Württemberg Ministry for the Environment, Climate Protection and the Energy Sector), Andreas Gerhard (Managing Director of Würth subsidiary TOGE Dübel GmbH & Co. KG), David Röck (Engineer at Adolf Würth GmbH & Co. KG) and Nikolai Sklarov (Engineer at TOGE Dübel GmbH & Co. KG).  © unger+ Kreative Strategen / Jan Potente
















Aerated concrete roofs make it difficult to install photovoltaics

The installation of photovoltaic systems on existing roofs promotes the energy transition and avoids new land consumption. But the systems are heavy. Industrial buildings in particular, which are 25 years old or older, often have roofs made of aerated concrete, the load-bearing capacity of which is not designed for the installation of a PV system. Until now, these roofs had to be dismantled if necessary and reconstructed from a more stable building material, such as concrete or steel. This procedure resulted in several tonnes of construction waste and newly produced concrete.


Subsequent reinforcement against waste of resources

With REINFORCE AC, the Würth Group has developed a system with which the load can be distributed across the roof surface. This is possible using screws and a reinforcing mortar that is pressed into the air capillaries of the aerated concrete. While the screws already support the existing reinforcement of the aerated concrete, they are used to anchor GRP or aluminium rods to the underside of the roof. They serve as additional external reinforcement and bending tensile reinforcement. This allows up to 80 per cent additional load-bearing capacity to be placed on the roof. REINFORCE AC was developed together with Toge Dübel GmbH & Co. KG, a subsidiary of the Würth Group, at the Reinhold Würth Innovation Centre CURIO.


The REINFORCE AC system consists of three components: High-performance aerated concrete screws, composite mortar and GRP profiles.  © Würth














Test setup at the Reinhold Würth Innovation Centre CURIO  © Scanner













From the ZiE to the general building authority approval

The solution is already available on the market; projects receive approval in individual cases (ZiE). General building authority approval from the German Institute for Building Technology (DIBT) is expected by summer 2024. “The special thing about our reinforcement solution is that it can be easily realised retrospectively and during operation. This saves companies considerable costs because they don’t need a new roof. The system also conserves resources because the individual product components can be completely recycled,” says Thomas Klenk, Managing Director of Adolf Würth GmbH & Co. KG for Purchasing, Product, Marketing and Research & Development.


With our proven concrete screw TOGE TSM High Performance, we have had an absolute premium product with the highest load values in our range for many years.

From now on, the TOGE TSM High Performance is also approved for masonry (solid brick, sand-lime brick, perforated brick, lightweight concrete)! This extends the existing range of applications enormously and makes the product even more efficient. Why not give it a try right now!

Do you have any questions? Our support team will be happy to help you!
Call us: 0911 _ 659 68-43

One of the biggest advantages of concrete screws compared to all other anchoring systems in concrete is the fast, easy and safe installation in combination with extremely high load values. Above all, the simple and fast processing under all application conditions is a very clear advantage that offers customers great benefits.

We therefore developed a new version of our stainless-steel concrete screw that offers significantly better installation behaviour – especially in critical situations. The result, of which we are very proud, is our new TOGE TSM high performance LT A4 concrete screw.

With this new concrete screw, we have achieved an easier and faster installation but still with one of the highest approved loads on the market. The new stainless version is available since July 1st, and you can order them from us right away. Click here to go directly to the product.

You have questions? Our support team is happy to help!
Just call us on: + 49 _ 911 _ 659 68-43

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TOGE Dübel GmbH & Co. KG
Illesheimer Str. 10
90431 Nürnberg


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