Moving Roof Soil Pipe

[NonHandyman]

Hi all,
I have a leak in my three season porch. Unfortunately, the previous owners left the soil pipe in the valley of the roof when adding the porch. I had a plumber come to give me an estimate on moving the soil pipe. After going in my attic, he said it would be best to move the soil pipe by going through the wall in my kitchen (which adjoins to the porch). He quoted me at 675.

My cousin, who is a construction guy, said he thinks they are not going through the attic because it's more work, and he doesn't agree with their cost estimate (which includes moving the pipe, putting a new boot on, and repatching the drywall of the kitchen.

Is it wrong to go through the wall? Am I being robbed? Any info would be appreciated!

 

[Newboy]

Assuming you're actually in the USA it's probable a good idea to post in a US forum rather than a UK one - call out and travel costs could be a bit more than the cost of the job!

 

[ree]

If you posted some pics it would help? I cant visualise what you describe. Presumably the S&VP was in position in the roof plane before the porch valley was built, & they simply built around it?
However, allowing for the most simple scenario:

If the S&VP is in PVC or ABS, and if your local code allows, then its simply a matter of cutting the pipe in the loft and 45 degreeing over and then 45* up and out of the roof in a more suitable place.
CI stacks can be more problematic.

 

[NonHandyman]

If you posted some pics it would help? I cant visualise what you describe. Presumably the S&VP was in position in the roof plane before the porch valley was built, & they simply built around it?
However, allowing for the most simple scenario:

If the S&VP is in PVC or ABS, and if your local code allows, then its simply a matter of cutting the pipe in the loft and 45 degreeing over and then 45* up and out of the roof in a more suitable place.
CI stacks can be more problematic.

Thanks for the reply! I will post a picture tomorrow. The pipe is Cast Iron.