S-5! SnoClips are highly advised on seams of 2" (50 mm) and higher. They are recommended but not mandatory on seam heights of 1-3/4" and lower (45mm). They retard movement of snow and ice beneath the crossmember. SnoClip is not always an option as some metal roofing panels have minor ribs or striations that will not allow the SnoClip to function properly. SnoClips can be used on a striated panel but the results may vary.
SnoClip III fits seam heights of 1-3/4" to 3" vertical seam.
Their use on other rows is optional and left to user discretion. Typically only one SnoClip per panel is required but may be used more frequently if desired (two SnoClips are needed on panels that have a seam height of 2-3/4" or taller).
