weber coloured render on cooltherm insulation board.

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United Kingdom
hello we have recently completed a renovation job where the external insulation board has been used with the weber colored polymer render with a base coat and mesh, stress pads have been placed around windows to stop cracking. the job is now finished and looks loverly with a float and sponged finish. THE ONLY PROBLEM IS CRACKS they have started to appear on all panels, some are short but some reach 2 meters .... no idea why this is happening any help much appreciated thanks ,asher.
 
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How was the mesh fixed?

That is : overlaps at joints, how and when it was bedded in .
 
The mesh was overlapped just past the indicator lines on the rolls of mesh. Around 6 inches, with large square stress pads at every corner of every window. Thanks for the reply.
 
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