Radio Flyer
Member
My home is a two-story modular that’s 11 years old and connected to sewer. It seems that when it was built the seven vent stacks installed up to the attic were only stubbed into the attic and never extended through the roof or even tied together. They’re each capped with foil and they mostly stick up just a few inches above the blown insulation (see photos). My drains do seem to work though, and amazingly, I don’t smell any sewer gas in the attic.
Separately, on the side of the house, there’s a small, single-story entry room with a half-bath. Above that half-bath is a vent that DOES penetrate the roof in the normal way (see photo, with vent circled in red). Again, though, it’s at a lower level than the main house’s roofline, since it’s a single-story entry room only.
My question is, instead of extending the vents in the attic above the roofline in the traditional way, would it be acceptable for me to just install Studor Mini-Vent AAV’s on each of those seven vent stacks, since I already have one vent above the roofline to relieve positive pressure,?
To do that, I’m assuming I’d need to add extenders, elbows in some cases, and pipe to get them at least 6 inches above the insulation, right? That would avoid creating new roof penetrations (ideal here in snow country, plus roofers here are booked until next summer, so it’d be hard to get help to finish the boots and flashing). Thank you!
Separately, on the side of the house, there’s a small, single-story entry room with a half-bath. Above that half-bath is a vent that DOES penetrate the roof in the normal way (see photo, with vent circled in red). Again, though, it’s at a lower level than the main house’s roofline, since it’s a single-story entry room only.
My question is, instead of extending the vents in the attic above the roofline in the traditional way, would it be acceptable for me to just install Studor Mini-Vent AAV’s on each of those seven vent stacks, since I already have one vent above the roofline to relieve positive pressure,?
To do that, I’m assuming I’d need to add extenders, elbows in some cases, and pipe to get them at least 6 inches above the insulation, right? That would avoid creating new roof penetrations (ideal here in snow country, plus roofers here are booked until next summer, so it’d be hard to get help to finish the boots and flashing). Thank you!
