Lead fixing Clips will hold lead permanently in position. Cut to the required length fixing clips are recommended in rolls, welts, standing seams and for the clipping of lap joints and flashings. Lead fixing clips should not be less than 50mm wide; they should be turned over at the edge of the lead by at least 25mm except where they are tucked into welted edges. Continuous clips should not be less than 75mm wide.FixingsClips at 300 to 500mm centres depending on exposures for flashings.