SIST EN 17872:2024

Flexible sheets for waterproofing - Underlays for discontinuous roof coverings - Artificial ageing procedure

This document specifies a procedure for artificial ageing of flexible underlays which are used under discontinuous roof coverings. This is achieved by exposing test samples to UV-radiation, elevated temperature in combination with high relative humidity and elevated temperature in combination with accelerated air-speed.

Flexible Bahnen für Abdichtungen - Unterdeck- und Unterspannbahnen für Dacheindeckungen - Verfahren zur künstlichen Alterung

Dieses Dokument legt einen Prozess für die künstliche Alterung von Unterdeck- und Unterspannbahnen fest, die unter der Dachdeckung verlegt werden. Dies wird erreicht, indem Prüfproben UV Strahlung, erhöhter Temperatur in Kombination mit hoher relativer Luftfeuchte und erhöhter Temperatur in Kombination mit erhöhter Luftgeschwindigkeit ausgesetzt werden.

Feuilles souples d'étanchéité - Écrans souples de sous-toiture pour couverture en petits éléments discontinus - Mode opératoire de vieillissement artificiel

Le présent document spécifie un mode opératoire de vieillissement artificiel des écrans souples de sous-toiture utilisés sous les couvertures en petits éléments discontinus. Pour ce faire, les échantillons d'essai sont exposés au rayonnement UV, à température élevée combinée à une humidité relative élevée et une température élevée avec une vitesse de ventilation accélérée.

Hidroizolacijski trakovi - Podložne folije za strešne kritine in stene - Postopek umetnega staranja

Ta dokument določa postopek umetnega staranja hidroizolacijskih trakov za podložne folije, ki se jih uporablja za strešne kritine in stene z UV-sevanjem, povišano temperaturo v kombinaciji z visoko relativno vlažnostjo in povišano temperaturo v kombinaciji s pospešeno hitrostjo zraka.

General Information

• Status: Published
• Public Enquiry End Date: 29-Sep-2022
• Publication Date: 11-Feb-2024
• ICS: 91.100.50 - Binders. Sealing materials
• Technical Committee: VLA - Water proofing
• Current Stage: 6060 - National Implementation/Publication (Adopted Project)
• Start Date: 24-Jan-2024
• Due Date: 30-Mar-2024
• Completion Date: 12-Feb-2024
• Ref Project: EN 17872:2023 - Flexible sheets for waterproofing - Underlays for discontinuous roof coverings - Artificial ageing procedure

Overview

SIST EN 17872:2024 is a European standard specifying an artificial ageing procedure for flexible sheets used as underlays in discontinuous roof coverings. Developed by CEN/TC 254, this standard defines a method to simulate the long-term weathering effects experienced by roofing underlays during installation and service life. It focuses on replicating exposure to UV radiation, elevated temperature combined with high relative humidity, and elevated temperature combined with accelerated air-speed (ventilation).

The standard aims to assess the durability and performance of waterproofing underlays by evaluating their resistance to water penetration and their mechanical properties before and after artificial ageing. SIST EN 17872:2024 is intended to complement the harmonized standard EN 13859-1 and facilitates consistent testing across European markets.

Key Topics

• Scope and Purpose
  Defines artificial ageing procedures designed to simulate the climatic stresses underlays face during roof installation (UV exposure) and long-term service (humidity and temperature cycles, ventilated heat exposure).

• Artificial Ageing Procedure

  • Continuous UV-A irradiation with elevated temperature (black standard temperature of 50 °C for 336 hours).
  • Followed by 12 weeks at 70 °C and 90% relative humidity to mimic hydrolytic and oxidative effects.
  • Lastly, 12 weeks at 70 °C in a ventilated oven with air speed between 0.25–0.75 m/s to replicate drying and airflow conditions.

• Test Specimen Preparation and Conditioning

  • Specimens are cut larger than required test dimensions to avoid edge effects and trimmed post-ageing.
  • Sets are prepared for both exposed and unexposed conditions for comparison.
  • Specimens are marked to indicate machine direction and orientation.

• Apparatus Requirements

  • UV-A exposure chamber without water spray.
  • Climate chamber providing high humidity and controlled temperature without metallic contact.
  • Ventilated oven with controlled airflow and temperature capable of maintaining air exchange rates and air speeds.

• Testing Parameters

  • Water penetration resistance.
  • Tensile strength and elongation at maximum force.
  • Visual inspection for aging effects using standard definitions (EN 1850-1, EN 1850-2).

• Reporting

  • Detailed documentation of product identification, test conditions, visual observations, mechanical and water resistance results before and after ageing.

Applications

• Roofing Industry
  Enables manufacturers and testing laboratories to evaluate the durability of flexible waterproofing underlays used underneath tiles, slates, and other discontinuous roofing materials.

• Product Development and Quality Control
  Assists manufacturers in developing products that maintain waterproofing and mechanical integrity throughout their service life.

• Compliance and Certification
  Supports conformity assessment for underlays in line with European regulations and facilitates national standard adoption by CEN member countries.

• Research on Weathering Resistance
  Provides a reproducible, accelerated aging method for academic and industrial research on polymeric roofing underlays and related sealing materials.

Related Standards

• EN 13859-1:2010
  Definitions and characteristics of flexible sheets used as underlays for discontinuous roofing.

• EN 1296:2000
  Artificial ageing method by long-term exposure to elevated temperature.

• EN 1297:2004
  Artificial ageing method combining UV radiation, elevated temperature, and water exposure.

• EN 1850-1:1999 & EN 1850-2:2001
  Methods for determining visible defects in bitumen, plastic, and rubber waterproofing sheets.

• ISO and IEC Terminology Databases
  Authoritative sources for standardization terms used in waterproofing and material testing.

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This standard is essential for ensuring the long-term performance of flexible waterproofing underlays in discontinuous roofs, providing a robust framework for laboratory ageing tests that simulate real-world environmental conditions. Adoption of SIST EN 17872:2024 enhances product reliability, aids compliance with European regulations, and supports innovation in roofing materials technology.

Standards Content (Sample)

SLOVENSKI STANDARD
01-marec-2024
Hidroizolacijski trakovi - Podložne folije za strešne kritine in stene - Postopek
umetnega staranja
Flexible sheets for waterproofing - Underlays for discontinuous roof coverings - Artificial
ageing procedure
Flexible Bahnen für Abdichtungen - Unterdeck- und Unterspannbahnen für
Dacheindeckungen - Verfahren zur künstlichen Alterung
Feuilles souples d'étanchéité - Écrans souples de sous-toiture pour couverture en petits
éléments discontinus - Mode opératoire de vieillissement artificiel
Ta slovenski standard je istoveten z: EN 17872:2023
ICS:
91.100.50 Veziva. Tesnilni materiali Binders. Sealing materials
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EN 17872
EUROPEAN STANDARD
NORME EUROPÉENNE
December 2023
EUROPÄISCHE NORM
ICS 91.100.50
English Version
Flexible sheets for waterproofing - Underlays for
discontinuous roof coverings - Artificial ageing procedure
Feuilles souples d'étanchéité - Écrans souples de sous- Flexible Bahnen für Abdichtungen - Unterdeck- und
toiture pour couverture en petits éléments discontinus Unterspannbahnen für Dacheindeckungen - Verfahren
- Mode opératoire de vieillissement artificiel zur künstlichen Alterung
This European Standard was approved by CEN on 20 November 2023.

CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this
European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references
concerning such national standards may be obtained on application to the CEN-CENELEC Management Centre or to any CEN
member.
This European Standard exists in three official versions (English, French, German). A version in any other language made by
translation under the responsibility of a CEN member into its own language and notified to the CEN-CENELEC Management
Centre has the same status as the official versions.

CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia,
Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway,
Poland, Portugal, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Türkiye and
United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION

EUROPÄISCHES KOMITEE FÜR NORMUNG

CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2023 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 17872:2023 E
worldwide for CEN national Members.

Contents Page
European foreword . 3
Introduction . 4
1 Scope . 5
2 Normative references . 5
3 Terms and definitions . 5
4 Principle . 5
5 Apparatus . 6
5.1 Apparatus for exposure to UV-A irradiation and elevated temperature . 6
5.2 Apparatus for exposure to elevated temperature in combination with high relative
humidity . 6
5.3 Apparatus for exposure to elevated temperature with accelerated air-speed
(ventilated oven) . 6
6 Preparation of test specimens . 7
6.1 Dimensions of test specimens . 7
6.2 Number of test specimens . 8
6.3 Test specimen identification . 8
7 Procedure. 8
7.1 Exposure to UV irradiation and elevated temperature . 8
7.2 Exposure to elevated temperature in combination with high relative humidity . 8
7.3 Exposure to elevated temperature in combination with accelerated air-speed . 8
7.4 Conditioning of test specimen before follow up testing . 8
7.5 Follow-up testing . 8
8 Test report . 9
Bibliography .10
European foreword
This document (EN 17872:2023) has been prepared by Technical Committee CEN/TC 254 “Flexible
sheets for waterproofing”, the secretariat of which is held by NEN.
This European Standard shall be given the status of a national standard, either by publication of an
identical text or by endorsement, at the latest by June 2024, and conflicting national standards shall be
withdrawn at the latest by June 2024.
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CEN shall not be held responsible for identifying any or all such patent rights.
Any feedback and questions on this document should be directed to the users’ national standards body.
A complete listing of these bodies can be found on the CEN website.
According to the CEN-CENELEC Internal Regulations, the national standards organisations of the
following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Croatia,
Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland,
Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Republic of North
Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Türkiye and the United
Kingdom.
Introduction
During its time on the roof, a discontinuous roofing underlay is exposed to different climatic conditions.
During installation, whilst the roof is open prior to application of the primary covering, the underlay is
exposed to UV and direct weathering. After completion of the roof, the underlay is subject to long term
oxidation and hydrolysis, being exposed to elevated temperatures in combination with high relative
humidity and accelerated air-speed due to wind-driven and thermally-driven air flows. The method
described in this document is designed to simulate these relevant exposures, which affect the durability
of an underlay.
This document is an additional voluntary artificial ageing test procedure that is intended to be
incorporated into the harmonized standard EN 13859-1:2010 at a future revision.
1 Scope
This document specifies a procedure for artificial ageing of flexible underlays which are used
...