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Old 11-19-2013, 10:50 PM   #1
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Default Removal of sap on deck flooring

I went on an estimate today to look at a deck that needs to be pressure washed and stained. The deck was built almost a year ago, out of the entire deck only 3 steps have a heavy build up of sap on it. I know that the stain will not adhere to the sap, what can i use to remove the sap? Or should i just replace these boards?
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Old 11-19-2013, 10:54 PM   #2
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Is it coming up from the boards or dripping down from a tree?
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Old 11-20-2013, 05:52 PM   #3
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Is it coming up from the boards or dripping down from a tree?
It is coming up from the boards
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Old 11-20-2013, 06:05 PM   #4
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you can scrap it up, but it will come back, you might be able to flip the board, or put a new one on their, or at the very least scrape it off and prime it with a alcohol base primer
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Old 11-20-2013, 06:28 PM   #5
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Don't waste a minute on them other than replacing. You cannot stop the sap for more than a very short time.
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Old 11-20-2013, 08:01 PM   #6
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Originally Posted by Pat_The_Painter View Post
It is coming up from the boards
replace them with new boards, that have been seasoned. I stained a deck for a a rental property owner who insisted that the carpenter told him it would be ok after 3 months and once i stained, it caused the sap to just leak out.
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Old 11-22-2013, 06:18 PM   #7
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Kind of a wild idea, but I too had one really sappy board as well as some knots oozing after I stained my deck.
I couldn't get the screws out so I tried another method that worked well surprisingly. I took a propane torch and lit the sap up. Let it bubble up scrap it off like four times. Then I took my grinder to it to remove any blackened areas.
Two coats of clear shellac and a coat of the Arbor coat semi and perfection.

I cant say it will last being the semi can't penetrate the wood through the shellac but we'll see. Lets face it the newer deck sealants and semi's don't penetrate that well anyhow.
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Old 11-22-2013, 07:47 PM   #8
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Built a picnic table out of old seasoned wood. One of the seat boards started sapping. 3 years later it still seeps sap. Replace them.
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