Friday, March 17, 2017

Resin Seeping From Sides of Finished Logs

Resin or pitch can seep from logs for years after the logs have been cut and the building finished. This usually happens while moisture is leaving the wood, carrying pitch to the surface. Also, the logs could have been summer cut when they contained more moisture, sap, and pitch. It is always best to cut logs during the winter months or early spring when moisture, sap, and pitch are at a minimum.

Treatment: If the sap or pitch is dry and crystallized it can be scraped off with a metal putty knife or sanded off with an Osborn buffing brush; the remaining residue can be cleaned up with a mild solvent such as rubbing alcohol. If the sap or pitch is still wet, wait until it has stopped running. A cleaning agent like X-180 can be used to remove the wet sap, or let it dry and then clean up with a mild solvent like rubbing alcohol. If you clean it off while it is still wet, it will probably continue to ooze back out over the area you have cleaned. You may want to just let the pitch continue to seep out until it stops before trying to clean it up.

Reprinted from our Log Core newsletter Fall 2016 edition

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