Construction products detail

Leak detection linings serve to create a second skin within the meaning of water legislation in single-skin tanks or containers. For this purpose, an internal lining is inserted into a single-skin tank, where together with a permeable spacer material, it forms a second skin and an interstitial space. Leak detection linings are commonly made of thermoplastic membranes made of glass-fibre reinforced plastic or steel, which in most cases are pre-installed in the tank. The floors of large flat-bottom tank structures are mainly fitted with steel sealings. The interstitial space is realised here through an intermediate layer made of wire mesh or diamond sheets.

Regulatory framework

DIBt grants national technical approvals (abZ) for leak detection linings not covered by the harmonised part of DIN EN 13160, usually in combination with a general construction technique permit (aBG) for the application.

The national technical approvals/general construction technique permits for these products and construction techniques confirm that both the construction and water law requirements have been met. The products and construction techniques are thus deemed to be suitable in accordance with Section 63 of the Water Resources Act (WHG).