Vent Stack Roofed Over

asbestos

I got a call to repair a roof on a manf. house ($40,0000 house on a 300,000 lot) so I look at it and it is a small hole but inside, under the sheeting is a black pipe. there is a hole in the sheeting where a pipe would have come up but this is the original roof and it looks like it was just roofed over
So---
should I extend it outside just to be safe? There is a sink below it.
Does every fixture need it's own vent?

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Double-A

Depends on who you ask. If you ask a plumber, the answer is yes. If you ask a Manufacturer of manufactured homes, the answer is a blank stare. They are covered in most states under a totally separate code than every other type of building or dwelling. In Little Rock, the inspectors will only look at what is on the outside, no matter what. If it happens on the inside, I've been told they have no basis to go on, therefore decline to be involved.

During manufacturer in Arkansas, there is an "inspector" that looks at every home supposedly, but I have no idea who he works for.

Long story short, welcome to the twilight zone.

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maj

I shingled a prefab house last year, that had a similar problem. The homies wanted me to check for a bath vent in the attic. There was an operable fan in the bathroom, but no vent hood on the roof. I crawled up in the attic and found the vent pipe hooked up to the fan, but laying buried under insulation.

Just another reason for me to NEVER recommend prefabs to anyone.

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Grumpy

I'm not a plumber but in dealing with these vents I have found in my experience that quite often fixtures in nearby locations will share a vent. Some roofs may have two or three stacks just based on sink and toilet locations. This is especially true in newer homes, while alot of older homes, the designers tended to try to bundle all the plumbing into one wall and those homes usually have one stack.

Honestly I'd say that if I were in your shoes the best thing you can do is extend the stack out and properly flash it at the roof. I saw once on an addition where the new roof line was built right over the old and the stacks were never extended out of the new roof, there was a black discoloration on the bottom side of the sheating where the stacks vented against the wood. The attic even had a slight hint of sewery smell to it.

RobertF

Man I can only think of one mobile home park here in the LA area that gets those prices and it's at the Top O Topanga. Damd'd expensive place but a beautiful view!

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