TS EN 13707

TS EN 13707 is the standard for flexible reinforced bitumen sheets used for roof waterproofing, setting out the definitions and characteristics used to identify this product family. In practical terms, it describes a membrane type designed to provide water-tightness in roofing systems, where bitumen is reinforced to improve dimensional stability and mechanical behaviour.

How the roofing sheet categories differ

The standard covers sheets intended for use as top layers, intermediate layers and underlayers. That distinction matters because each layer in a roof waterproofing build-up serves a different function: the exposed top layer must resist weathering and surface stresses, while intermediate and underlayers support continuity, joint integrity and the overall waterproofing system. In general technical terms, reinforced bitumen sheets are bitumen-based membranes strengthened with a carrier such as polyester or glass reinforcement to improve tensile performance and reduce movement-related problems.

Explicit boundary of the scope

The standard does not cover reinforced bitumen sheets used as underlays for discontinuous roofing. So the document is aimed at continuous roof waterproofing systems rather than underlay applications associated with separate roofing coverings. Its definitions and characteristics help distinguish product types and support consistent comparison of materials intended for roofing use.

• Product family: flexible reinforced bitumen sheets
• Intended use: roof waterproofing
• Covered positions: top layers, intermediate layers and underlayers
• Excluded use: underlays for discontinuous roofing
• Focus: definitions and characteristics