Quality | Lift and slide doors from Delbrück-Boke

Quality without compromise

Our aim is to manufacture lift and slide doors that combine precision and durability with attractive design and maximum ease of use. That is why, for example, the profile wall thicknesses of our products consistently comply with the highest quality level RAL class A (in accordance with DIN EN 12608). And our quality standards clearly exceed the minimum legal requirements in other respects too. We have also been awarded the RAL quality seal for PVC-U windows since 1984. A comprehensive quality management system allows us to seamlessly monitor and continuously optimise the entire production process.

Uncompromising quality you can rely on.

We use our in-house, computer-controlled test stand to determine the performance characteristics of our products from ongoing series production, such as air permeability, impermeability to driving rain and resistance to wind load. These measures help us to provide our customers with exactly what they expect from us: Uncompromising quality you can rely on.

Our certifications

RAL quality-assured lift and slide door systems

ift-certified burglar resistance RC 1 N, RC 2 / RC 2 N and RC 3

Manufacturer of burglar-resistant building elements recommended and listed by the criminal investigation department ("K-EINBRUCH" initiative)

Independent system and suitability test by ift Rosenheim

Highest sound insulation up to sound insulation class 4

ift-tested / measured thermal transmittance of the frame (Uf)