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    vintage1937's Avatar
    vintage1937 Posts: 1, Reputation: 1
    New Member
     
    #1

    Feb 19, 2011, 04:52 PM
    White stains on asphalt shingles
    What causes white stains on asphalt shingles at the bottom of ledder fed by Cental AC handler?
    Jim
    hkstroud's Avatar
    hkstroud Posts: 11,929, Reputation: 899
    Home Improvement & Construction Expert
     
    #2

    Feb 19, 2011, 08:40 PM

    What's a ledder?

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