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  • 1.  Exterior preservation for log cabins

    Posted 04-16-2015 12:02 PM

    Here at PA Museums, the statewide association in Pennsylvania, we received a message asking for help with preserving log cabins.  Can anyone lend this museum a hand?

    Here is the letter we received:

    April 2015

     

    Greetings,

     

    The Cashmere Museum (Chelan County Historical Society) exhibits 20 authentic pioneer log cabins of late 1800 vintage. Each cabin was disassembled at its original location, transported, and then reassembled at the Museum's Pioneer Village.

    assay outside croppedOne of our greatest maintenance challenges is that of preserving these treasures, beginning with the exterior log walls.

    Our exterior log walls are both hewn (as at left) and unhewn, and are totally natural finish. Our summers are hot and dry, but our winters include rain and snow so mildew and dry rot are our principal concerns. Pest control services seem to be effective at preventing insect infestations.

    Today, our approach to log preservation is to apply a penetrating treatment (containing Brazilian rosewood oil) once every 5-years. We are located on the banks of the Wenatchee River which is major salmon habitat so that whatever product we use must be approved by state and federal agencies.

     

    The purpose of this writing is to explore and discover what methods and products other people use to discourage and control mildew and dry rot in similar antique log structure situations. If you have any information to share or know someone who might, I hope you will contact me.

     

    Thank you for your consideration.

     

    Sincerely,

    Signature - Jim's

    Jim Wonn

    President, Board of Directors

    __________________________

    PO Box 22 /  600 Cotlets Way, Cashmere, WA  98815

    509-782-3230

    Email: info@cashmeremuseum.org      www.cashmeremuseum.org

     




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  • 2.  RE: Exterior preservation for log cabins

    Posted 04-16-2015 01:14 PM

    Hi there Rusty,

    I'm certainly not an expert on log cabins, but I have treated lumber before to resist rot. I think the most effective solution in this case would be borate. Borate can cure rot issues by killing the fungi and insects that cause problems in lumber. You can buy borate treatments online, and just follow the application instructions. The only concern is that sometimes borate treatment can cause discoloration of wood. So it may be best to test it in a small area first before applying it to an entire structure. Also, water can leech borate out of the wood so applying a coat of water repellent after the borate application can help. Your letter expressed concern about environmental impacts, so here is the EPA page on borate. Essentially, it is extremely safe in normal applications.

     

    Hope this helps,

    Steven

    ------------------------------
    Steven Prokopchak
    Associate Producer
    Jamestown-Yorktown Foundation
    Williamsburg VA
    ------------------------------


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  • 3.  RE: Exterior preservation for log cabins

    Posted 04-18-2015 08:23 AM
    You might want to contact the Old Mission Historical Society in Traverse Ciry, Michigan. They just finished restoring a cabin and may have some ideas on how to take on the project in the most cost effective manner. Best- Dana ------------------------------ Dana Brown PhD Student School of Museum Studies ------------------------------
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  • 4.  RE: Exterior preservation for log cabins

    Posted 04-19-2015 07:26 AM
    Contact the Association for Preservation Technology International, www apti.org. This is an international organization of those working in the field of architectural preservation and conservation. You might also want to contact the American Institute for the Conservation of Historic and Artistic Works at www.conservation-us.org. Hope this helps. ------------------------------ Martha Katz-Hyman Curator Jamestown-Yorktown Foundation Williamsburg VA ------------------------------
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