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Is this discoloration a problem? (lemmy.world)

submitted 6 months ago by [email protected] to c/[email protected]

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Renovating the bathroom and found these dark patches in the joists and roof lumber surrounding the old vent pipe. The PVC part is new.

Anything bad here? Anything we need to address?

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[–] [email protected] 16 points 6 months ago (1 children)

Uhh.. is it legit to just cut thru beams to put in piping? Over half of those beams are cut thru. I'd ask about that as well. I can't tell where this is, but if the plumber cut thru load bearing beams to put in plumbing that might be an expensive fix.

[–] [email protected] 1 points 5 months ago

No, it's not. You can drill holes through the center of a joist or rafter but the permitted diameter of the hole depends on the overall width of the board. Notching the edge (or in this case cutting most of the way through it) dramatically weakens the board since the edges bear most of the tension from the load.