How To Repair A Slate Roof Leak
With good wire cutters you might also be able to cut off the head of the nail which will help.
How to repair a slate roof leak. I ve repaired complex metal roof flashings with torch down modified bitumen but there is a fire risk doing so. To do this use the slate ripper to rip off the nail that hooks the slate onto the slate roof. You can use either a dry bonding gutter or the standard bonding gutter. Continue reading at slate roof repair worn out or select a topic from the closely related articles below or see the complete article index.
Or see these. Details are at slate roof leaks temporary repair once the necessary slates are removed the valley is usually replaced with new heavy copper or on some roofs folks use other flashing materials like aluminum i don t recommend that.