If a secure fixing cannot be achieved a timber fixer should be fitted.
Sure edge gutter trim.
Gutter trim with built in batten gutter trim with standard batten backplate check kerb trim check kerb trim to gutter trim corner gutter trim external corner.
6 x 2 5m lengths of pre drilled trim with sealant foam applied 6 x 2 5m lengths of standard back plate 5 gutter trim joiners bag of 50 polytops 50mm bag of 50 stainless steel back plate fixing pins 30mm.