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    noonan01's Avatar
    noonan01 Posts: 3, Reputation: 1
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    #1

    Oct 9, 2007, 01:47 PM
    Preventing mold or mildew after powerwashing?
    What can I do to prevent a brick patio from getting
    Mold or mildew again
    After powerwashing the patio.
    ballengerb1's Avatar
    ballengerb1 Posts: 27,378, Reputation: 2280
    Home Repair & Remodeling Expert
    		  
    #2

    Oct 9, 2007, 01:53 PM
    I am assuming you are talking about house siding, right? If not, please write back. If you used a mildewcide it should kill not just clean most of the mildew. A periodic spray of a 1:3 solution of bleach/mildewcide and water will prevent regrowth. If it is on a roof you can install a copper or zinc strip at the peak. The rain reacts with the metal and prevents mold and mildew.
    tickle's Avatar
    tickle Posts: 23,796, Reputation: 2674
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    #3

    Oct 9, 2007, 01:57 PM
    Prevent mold and mildew on what kind of surface, after powerwashing ? It makes a difference to know; it could be a porous surface which would have to be treated differently then non porous.
    caibuadday's Avatar
    caibuadday Posts: 460, Reputation: 10
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    #4

    Oct 9, 2007, 08:11 PM
    Quote Originally Posted by ballengerb1
    I am assuming you are talking about house siding, right? If not, please write back. If you used a mildewcide it should kill not just clean most of the mildew. A periodic spray of a 1:3 solution of bleach/mildewcide and water will prevent regrowth. If it is on a roof you can install a copper or zinc strip at the peak. The rain reacts with the metal and prevents mold and mildew.
    What is the min. width of the copper strip for it to work, thanks
    ballengerb1's Avatar
    ballengerb1 Posts: 27,378, Reputation: 2280
    Home Repair & Remodeling Expert
    		  
    #5

    Oct 10, 2007, 07:45 AM
    The copper is slid under the cap row of shingles and then leaves a reveal of about 4 inches. I do not honestly know if there is an actual standard. Maybe a roofer could help us out more.
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