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Plumbing rough-in before roofer?

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Plumbing rough-in before roofer? jam6444 04-13-2007
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Posted by on April 13, 2007, 12:41 pm
My plumber wants to do his rough in before the shingles go on I guess
so he can get his vent stacks done without any interference. Is this
the typical sequence? I'd really rather get some roofing on as early
as possible and let plumber get in there afterwards. any thoughts?
this is new residential construction.


Posted by Hambone on April 13, 2007, 1:31 pm
I am in the same exact spot you are. It really doesn't matter who goes first,
but typically the plumber *wants* to go first so he doesn't have to get up
on the roof later to install the flanges, flashing, etc. I was like you and
wanted to get the roof on ASAP, so advised the plumber and he rushed out to at
least cut the holes in the roof for me. Then the roofers were able to install
the flashing and all the plumber has to do is stick the pipes up into the
flashing.

If it were me, I would get the roof on ASAP and advise the plumber. Its in
his/her own best interest to get out there and at least cut the holes. We only
had 3 penetrations for plumbing and it took about 15 mins. He doesn't need to
connect all the rough plumbing together yet - just cut the holes.

I believe *normal* is that the roof goes on first and the plumber cuts the holes
and puts the flashing up. But I wanted to play nice and hopefully make
less work for the plumber and it sounds like you want to do the same.



jam6444@yahoo.com wrote:
> My plumber wants to do his rough in before the shingles go on I guess
> so he can get his vent stacks done without any interference. Is this
> the typical sequence? I'd really rather get some roofing on as early
> as possible and let plumber get in there afterwards. any thoughts?
> this is new residential construction.
>

Posted by on April 13, 2007, 2:58 pm
> I am in the same exact spot you are. It really doesn't matter who goes first,
but typically the plumber *wants* to go first so he doesn't have to get up
> on the roof later to install the flanges, flashing, etc. I was like you and
wanted to get the roof on ASAP, so advised the plumber and he rushed out to at
> least cut the holes in the roof for me. Then the roofers were able to install
the flashing and all the plumber has to do is stick the pipes up into the
> flashing.
>
> If it were me, I would get the roof on ASAP and advise the plumber. Its in
his/her own best interest to get out there and at least cut the holes. We only
> had 3 penetrations for plumbing and it took about 15 mins. He doesn't need to
connect all the rough plumbing together yet - just cut the holes.
>
> I believe *normal* is that the roof goes on first and the plumber cuts the
holes and puts the flashing up. But I wanted to play nice and hopefully make
> less work for the plumber and it sounds like you want to do the same.


That was my thinking exactly. Just put the stacks in first, so roofer
can get on with it.


Posted by Hambone on April 13, 2007, 4:40 pm
Yes - or make it even easier for your plumber and tell him you don't even need
the stacks
yet - you only the holes cut in the roof sheathing. That takes some thought as
to where
you want the stacks located, but with enough attic room it really doesn't matter
as the
plumber can move them around in the attic (do a certain degree). But he will
need to know
how big to make the holes - i.e., 2" vent, 3" vent, etc.

Posted by Matt Whiting on April 13, 2007, 5:05 pm
jam6444@yahoo.com wrote:
> My plumber wants to do his rough in before the shingles go on I guess
> so he can get his vent stacks done without any interference. Is this
> the typical sequence? I'd really rather get some roofing on as early
> as possible and let plumber get in there afterwards. any thoughts?
> this is new residential construction.
>

No, that isn't typical and I'll bet the roofers will not be happy having
to roll paper and install shingles around the vent pipe(s), but I can
certainly see why your plumber would rather be first! :-)

Matt

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