CEN/TC 254/WG 9 - Underlays for discontinuous roof coverings
Development of test methods and the product specification for the characterisation of underlays for discontinuous roofing and underlays ('breather membranes') for walls which are clad in lightweight materials such as timber and metals.
Underlays for discontinuous roof coverings
Development of test methods and the product specification for the characterisation of underlays for discontinuous roofing and underlays ('breather membranes') for walls which are clad in lightweight materials such as timber and metals.
General Information
Frequently Asked Questions
CEN/TC 254/WG 9 is a Working Group within the European Committee for Standardization (CEN). It is named "Underlays for discontinuous roof coverings" and is responsible for: Development of test methods and the product specification for the characterisation of underlays for discontinuous roofing and underlays ('breather membranes') for walls which are clad in lightweight materials such as timber and metals. This committee has published 12 standards.
CEN/TC 254/WG 9 develops CEN standards. The scope of work includes: Development of test methods and the product specification for the characterisation of underlays for discontinuous roofing and underlays ('breather membranes') for walls which are clad in lightweight materials such as timber and metals. Currently, there are 12 published standards from this working group.
The European Committee for Standardization (CEN) is a public standards organization that brings together the national standardization bodies of 34 European countries. CEN provides a platform for developing European Standards (ENs) and other technical documents in relation to various products, materials, services, and processes, supporting the European Single Market.
A Working Group in CEN is a specialized group responsible for developing standards or technical work within a defined scope. These bodies bring together international experts to create consensus-based standards that support global trade, safety, and interoperability.
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.
- Standard10 pagesEnglish languagee-Library read for1 day
This document specifies instructions for mounting and fixing for reaction to fire testing of factory-made underlays for discontinuous roof coverings and walls and contains provisions for direct and extended application rules.
These mounting and fixing procedures are not intended to be used for flat roofed waterproofing applications.
- Standard11 pagesEnglish languagee-Library read for1 day
This European standard specifies the characteristics of flexible sheets for underlays for walls which are to be used in walls behind outside wall coverings in order to avoid penetration of wind and water from outside. It specifies the requirements and test methods and provides for the evaluation of conformity of the products with the requirements of this document.
- Standard38 pagesEnglish languagee-Library read for1 day
This European standard specifies the characteristics of flexible sheets for underlays which are to be used under roof covering of discontinuous roofs. It specifies the requirements and test methods and provides for the evaluation of conformity of the products with the requirements of this document.
- Standard42 pagesEnglish languagee-Library read for1 day
This European Standad specifies a method to test the resistance against water penetration of underlays for discontinuous roofing and for walls.
- Standard7 pagesEnglish languagee-Library read for1 day
This European standard specifies the characteristics of flexible sheets for underlays which are to be used under roof covering of discontinuous roofs. It specifies the requirements and test methods and provides for the evaluation of conformity of the products with the requirements of this document.
- Standard34 pagesEnglish languagee-Library read for1 day
This European standard specifies the characteristics of flexible sheets for underlays for walls which are to be used in walls behind outside wall coverings in order to avoid penetration of wind and water from outside. It specifies the requirements and test methods and provides for the evaluation of conformity of the products with the requirements of this document.
- Standard32 pagesEnglish languagee-Library read for1 day
This document specifies the characteristics of flexible sheets for underlays which are to be used under roof covering of discontinuous roofs. It specifies the requirements and test methods and provides for the evaluation of conformity of the products with the requirements of this document.
- Standard31 pagesEnglish languagee-Library read for1 day
This document specifies the characteristics of flexible sheets for underlays for walls which are to be used in walls behind outside wall coverings in order to avoid penetration of wind and water from outside. It specifies the requirements and test methods and provides for the evaluation of conformity of the products with the requirements of this document.
- Standard32 pagesEnglish languagee-Library read for1 day
This European Standard specifies a method to test the resistance against water penetration of underlays for roofing.
- Standard6 pagesEnglish languagee-Library read for1 day
This document specifies the characteristics of flexible sheets for underlays for walls which are to be used in walls behind outside wall coverings in order to avoid penetration of wind and water from outside. It specifies the requirements and test methods and provides for the evaluation of conformity of the products with the requirements of this document.
- Standard32 pagesEnglish languagee-Library read for1 day
This document specifies the characteristics of flexible sheets for underlays which are to be used under roof covering of discontinuous roofs. It specifies the requirements and test methods and provides for the evaluation of conformity of the products with the requirements of this document.
- Standard31 pagesEnglish languagee-Library read for1 day