Heidi: >>Any other caveats that you can think of? Tell me now so I don't look like a goob-- I would't want you to look too gooby, so I suggest you check out my "Making Wood Shingles Last" article in the May 1990 issue of Old-House Journal. It describes how to select out the shingles that are going to fail first, making the roof last longer. John Leeke by hammer and hand great works do stand by pen and thought best words are wrought -- To terminate puerile preservation prattling among pals and the uncoffee-ed, or to change your settings, go to: <http://maelstrom.stjohns.edu/archives/bullamanka-pinheads.html>