This document specifies requirements and recommendations for the design, preparation and
application of cement, lime or other mineral binders, and/or combinations thereof, masonry cement
and polymer modified binder based external renderings, on all common types of backgrounds, to both
vertical walls and horizontal soffits. It includes rendering on both new and old backgrounds and the
maintenance and repair of existing work. Renders with organic materials as the principal binder are
not included in the scope of this document.
This document gives guidance on the use of established site, factory and semi-finished factory made
renders.
NOTE 1 Because of the many and varied materials and practices in Europe it is not possible for certain
aspects of the document to enter into sufficient detail to be fully usable to practitioners in each country. Such
recommendations required to complement, but not alter any basic European recommendation are given in
documentation prepared by each country. Aspects of this document which may need to be complemented are
indicated where they occur by a footnote referencing this paragraph. Due to the wide range of climatic conditions
in Europe, it is not possible to recommend precise drying times for backgrounds and render coats. Any times
given are for guidance only.
This document does not cover the following:
a) the use and application of special renders for liquid retaining structures, e.g. coatings, and for
backgrounds to cladding systems;
b) the structural repair of concrete;
c) the installation of proprietary external thermal insulation composite systems (ETICS);
d) the specification and use of sealants used to seal joints for use with rendering;
e) the use of gypsum based renders used externally, but their use may be permitted in some
countries;
NOTE 2 Gypsum based products soften when subject to prolonged moist conditions. The use of such
products externally will depend upon the climatic conditions where the render will be used and on the local
building traditions. With the exception of some drier countries in southern Europe gypsum based renders are
generally not recommended for external use and are therefore not included within the scope of this document.
Their use may be permitted and controlled locally2.
f) the design and installation of flashings at windowsills and elsewhere.
At various points in this document reference is made to the use of sealants. The specification of sealants
and the design of such joints is outside the scope of this document.
Diese Europäische Norm enthält Empfehlungen für die Planung, die Zubereitung und die Ausführung von Außenputzen auf Basis von Zement, Kalk und/oder deren Kombinationen, Putz- und Mauerbinder sowie polymermodifizierten Bindemitteln auf allen üblichen Arten von Putzgründen und sowohl auf vertikalen Wänden als auch auf horizontalen Unterschichten. Sie beinhaltet das Verputzen auf neuen und auf alten Putzgründen sowie die Instandhaltung und Ausbesserung vorhandener Putze.