I have a nail piecing through some lead flashing?

use clear waterproof silicone to seal up the hole

rich the roofer
October 2007

You will have to lift the slate above the damaged lead and remove the nail, for a permenent repair the lead should be replaced, although a quick, cheap and effective way would be to put mastic filler in the hole, replace the lead with a lead shingle to hold it in place without piercing the lead.

North devon roofing
September 2007