Lead clips are only suitable for sheltered exposures. For most situations tinned copper or stain-less steel should be used.
But
why do so many clips fail in high wind conditions? Mainly because the fixing
positions are not suited to the exposure.
Although
the spacing of clips important and the material used should relate to the
exposure it is likely to receive, the main consideration must always be the
position of the fixing points. Diagram 1 shows clip details.
Space clips at 300mm to 500mm intervals to suit exposure.
Fix
clips with copper clout nails.
If
in doubt about exposure, use additional fixings.
Where
extra fixings cannot be used, e.g. flashings over glazing, use a thicker gauge
clip material.