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.