On a typical new house or addition, who is generally respondsible for flashing around the vent penetrations, the roofer or the plumber? I would think that the roof should go on as soon as possible to protect the house and then the plumber might be doing his rough work after that. In that case, what happens when the plumber is ready to penetrate the roof. Does the roofer come back?
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Rich, it depends. On my jobs usually the carpenters do it, but by rights it's the plumbers job. Same deal with bathroom and kitchen vents--really it's the electrician's job, but if you want it to look good, you're better off doing it yourself or having the carpenters do it. No offense to any subs, I've just redone too many of their installations to trust them anymore. They don't often mind sharing their workload.
Mike
who is generally respondsible for flashing around the vent penetrations
That's one of those things best brought up in the pre-con meeting. This can be dicey business if worked out the other way around (want to find out the foundation man assumes drainage pipe is plumber's work and the plumber thinks it's the foundation man's--Just wait until the dirt guy gets ready to backfill . . . )
Some plumbers prefer the jacks go in first, and they run the vents to those, others want to run the vents and have the roofers work around them. You can't know until the parties are asked.
As the general contractor We assess what requires penetrations and provide the roofer with locations and sizes. I generally ask the roofers to provide all flashings and boots. B-vents and fireplace penetration can be unique to the fixture so it is important to have these placed before the roofers start. I generally will have the subs install just the roof penetration and come back and tie into when they are roughing in. I typically start figuring this out before my foundation is complete to make sure that items with long lead times(chimney pipes, furnace vents, fan terminations and misc..) arrive by the time that I need them.
We do most of our boots and flashings in copper and locating the proper parts is challenging.
Owen Roberts Group
10634 East Riverside Drive # 100
Bothell, WA 98011
http://www.owenrobertsgroup.com
I'm not directly involved in that sort of thing, but I think I'd make it clear to all involved that customer service and willingness to do what is needed is one of the criteria on which I judge subs.
"Not my table, mon" is a negative, in my book.
On an asphalt roof, if the vents have been pushed thru, we flash 'em then. If not, we usually have to come back and fix the mess the plumbers make unless it's someone we've worked with before.
On copper roofs, we normally ask them to stop below the roof sheathing and once we have the roof on, we cut the holes and glue the last piece on.
edit: It doesn't matter who does the flashing. The roofer still has to do a call back when it leaks.
I'm not green anymore.
Edited 7/15/2005 7:47 pm ET by cu
When I was a roofer, we almost always did the dry in right after the sheathing went on. That gave protection while crews got the soil stacks through and the fascia trim on. We would go back to roof it only when it was ready to roof.
I have never seen a plumber do a soils tack flashing right, so guess who gets the phone call at midnighjt when the plumber messes up - it's the roofer, so it is in the roofer's best intrests to wait for the stacks to be there before shingling the house and it is in the GC's best intrest to light a fire under the plumbers butt
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We try to get the roof on right away. If at all possible the plumber comes out, determines his vent locations, drills the holes, and supplies the boots. The mechanical contractor does the same for any vertical vents he has. Then the roofer installs the boots and the roofing together.
This is the way we do it:
House is framed and tar papered. Rough-ins, etc. Then roof goes on. The bottom line is that the roofer needs to be responsible for a water tight roof, and he is gonna be the best one at providing that. The plumbers and HVAC guys supply their vent stack boots, etc. and hack their holes before the roofer gets there. Plumbers just leave their boots in the house, but the HVAC guys go up there to mount their vents. Part of the idea is to make each sub make as few trips to the job as possible - this helps him and makes scheduling easier too. The caveat is that you gotta get the pre roof work done quickly as tar paper has a limited life span when exposed.