One of my basement walls has a couple of PVC pipes from the upstairs bathroom running horizontally along the concrete wall (about a foot down from the ceiling joists) - the concrete wall is already insulated (done by the original builder).
This however means that I cannot place my studs directly against the wall and attach them to the joists, because the PVC pipes are in the way.
1 / I can either place my studs about 6 inches out from the wall so they fit "floor to joist" missing the pipes (as the pipes would be between the concrete wall and the studs)
2 / I can sofit around the pipes - although attaching a furring strip to the concrete wall through the insulation material doesn’t appear very solid.
My question is, is it ok to use option 1 above - or is there some kind of code against having 6ins of space or so behind my new wall (I know I would have to sofit and leave an access point on the main vertical drainage pipe)
Or is it a requirement that I have to sofit around the pipes running horizontally and place my studs between floor and sofit.