Plumbing vent stack

eddieguy

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Would like to know what a good tool is to use for cutting holes in a metal roof for plumbing vent stacks And Possibly a flu for a gas burning fireplace heater

there is a new metal roof on the place and I would like to use a good tool for cutting it. If it requires I spend some money for the ideal tool for this I may do so as long as the tool is not crazy expensive
 

billr

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It is called a "nibbler". Hand ones are under $20, a powered one will be more like $100, but be far easier to use to make well-fitting holes. Considering the price of metal roofing (standing seam?), I would splurge for the powered type to avoid butchering the roof...
 

grcauto

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If you don't want it to leak you need to support the metal around it like patching a hole in drywall.
 

billr

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Huh??? Use a roof jack (flashing). The flue itself can be loose, and should be to account for thermal expansion or other movement of the roof/flue..
 

eddieguy

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Yeah I was wondering if I need to account for the metal expanding or not. I try to account for the possible factors to consider but sometimes I wonder if I’m overdoing it to the point it never gets done

I might spend the 100 bucks if it helps me not butcher the new roof. Guess I don’t have to be super skilled to use it
 

eddieguy

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Case in point- the vent stack I assume is level and not sloped. So hope that doesn’t present a problem getting the hole right probably overthinking it to much
 

billr

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Do you know what a "roof jack" is? They are made with a slope, for easy install on a roof.
 
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