Rather nail if possible. New holes would need to be 50-60mm in from the edge of the slate. Going on 30deg pitch. Do you think the side lap will be reduced to much.??? Would I be better re gauging the battens and hole above old holes using bonding gutter up to neighbours house.
Hi I’ve stripped my slate roof and would like to re use the slates but the holes are shot. Where should I be re holing them. Any comments appreciated. Thanks