BS EN 13914-1:2016 - External Rendering

Specifiers now have to be much more vigilant than was the case in the past over the selection of beading used for external rendering, as the Standard signals alerts over the presence of salts in the atmosphere or background which could result in corrosion. BS EN 13914-1: 2016 stipulates that specifiers and contractors have two main choices of beading. These are either PVC or stainless steel. The use of galvanised steel is permitted, albeit heavily qualified with regard to the level of salts, which it does not attempt to quantify further. It would therefore be a brave decision to permit their use, as there is significant wriggle room for the client when corrosion occurs. In any case, PVC beads are the more cost effective option, as galvanised beads must now be hot dipped after manufacture, greatly increasing costs.

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