3. Dimensions

3.1 Thickness

Polymeric geomembranes are generally thin (typically 1 to 2.5 mm), while bituminous geomembranes are thick (3 to 6 mm).

However, PVC geomembranes are available up to 6 mm thick. In some countries, polymeric geomembranes with a thickness of less than 1 mm (e.g. 0.75 mm or 0.9 mm) are used, but in France, only products with a thickness of 1 mm or more are considered geomembranes.

3.2 Plan dimensions

The plan dimension of geomembranes depends considerably on the...