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  • Dec 19th, 2020 1:12 pm
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Deal Fanatic
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Oct 13, 2008
5782 posts
2545 upvotes
Durham

Joists in basement

Anybody can advise what the black/brown (whatever colours) strip is at the bottom of the joist in my basement is?

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2 replies
Deal Fanatic
Nov 21, 2013
7459 posts
7951 upvotes
Spruce or pine have gummy sap... my guess would be dried tree sap
Deal Fanatic
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Jan 6, 2002
6238 posts
6567 upvotes
Toronto
Tree goo from the tree whence the joist was cut.
As someone long prepared for the occasion, in full command of every plan you wrecked---
Do not choose a coward's explanation, that hides behind the cause and the effect...

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