The best way to trim asphalt shnigles is with a circular saw with a carbide blade. First snap a chauk line from the peak to the fascia. Then starting at the peak slowly make a nice straight cut following the line. Make sure you allow for any imperfections in the rakers by allowing a little over hang like 1/4 to 1/2 inch. Make sure you wear long sleeves and googles as the stuff flies everywhere. Good luck
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19 years ago