ÖNORM EN 13914-1

This document specifies requirements and recommendations for the design, preparation and application of - renders based on cement, lime or other mineral binders, and/or combinations thereof, masonry cement and polymer modified binder based external renderings, in accordance with EN 998-1 or site made renders; - renders based on organic binders in accordance with EN 15824 on all common types of backgrounds. It includes rendering on both new and old backgrounds and the maintenance and repair of existing work. This document gives guidance on the use of established site, factory and semi-finished factory-made renders. 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 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; f) renders on historical monuments or buildings in protected areas; g) the design and installation of flashings at windowsills and elsewhere. Because of the many varied materials, practices and different climatic conditions, it is not possible for certain aspects of the standard to enter into sufficient detail to be fully usable by all practitioners. NOTE Local or national regulations take precedence when applicable.