NEN EN 13914-1 : 2016

Foreword
1 Scope
2 Normative references
3 Terms and definitions
4 General
  4.1 Essential principles
  4.2 Building programme
5 Materials
  5.1 Materials for site-made renders
  5.2 Water
  5.3 Types of render
  5.4 Reinforcement, supports and beads
  5.5 Fixings
  5.6 Firring
6 Design considerations
  6.1 General factors affecting the design of the rendering system
  6.2 Characteristics of backgrounds
  6.3 Adequacy of the background
  6.4 Durability of the rendering
  6.5 Conditions of exposure
  6.6 Resistance to rain penetration
  6.7 Resistance to water rising from the ground without pressure
  6.8 Soluble salts
  6.9 Effects of atmospheric pollution
  6.10 Effects of freezing
  6.11 Resistance to impact
  6.12 Corrosion of metals
  6.13 Resistance to cracking
  6.14 Thermal considerations
  6.15 Fire resistance and combustibility
  6.16 Protection afforded by architectural features and functions
  6.17 Selection of types of render and render mixes
  6.18 Number, thickness and relative strength of coats
  6.19 Types of finish
  6.20 Colour and texture
7 Work on site, preparation and application of renderings
  7.1 Storage of materials
  7.2 Scaffolding
  7.3 Protection of adjacent surfaces
  7.4 Preparation of background
  7.5 Proportioning of mix materials on site
  7.6 Mixing on site
  7.7 Forming architectural features
  7.8 Application of the various coats
8 Recommendations for maintenance and repair (other than
  restoration of old and historic buildings)
  8.1 General
  8.2 Inspection
  8.3 Repairs to cracks
  8.4 Repair of hollow or detached areas
  8.5 Overcoming unsatisfactory appearance
  8.6 Overcoming water penetration
Annex A (informative) General guidance on the selection of
        site mixed prescribed renders mixed according to
        background type
Annex B (informative) Restoration of renders on old and historic
        buildings
Bibliography

Defines 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.