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dnaSRPS CEN/TS 17986:2023

Flexible sheets for waterproofing - Extrapolation rules for testing results on resistance to root penetration

General information

50.60     Sep 7, 2023



Technical Specification



Experience with testing in accordance with EN 13948 has shown that flexible sheets for waterproofing with different thicknesses, different colours, different formulations, different surface finishing, and different internal fabrics, amongst others, have passed the test successfully.
This document expresses the extrapolation rules of the results of root resistance testing in accordance with EN 13948 for roof waterproofing sheets manufactured in accordance with EN 13707:2004+A2:2009, and EN 13956:2012.
Experience with testing in accordance to EN 13948 has shown that the main critical points are represented by the joints. If joints are done in a proper way, it will avoid the penetration of roots during the test.

Related directives

Directives related to this standard.


Regulation (eu) No 305/2011 of the European Parliament and of the Council of 9 march 2011 laying down harmonised conditions for the marketing of construction products and repealing council directive 89/106/eec

Life cycle


dnaSRPS CEN/TS 17986:2023
50.60 Close of voting. Proof returned by secretariat
Sep 7, 2023

Related project

Adopted from CEN/TS 17986:2023 IDENTICAL