I'm considering installing solar panels on my roof, but I have a vent stack that interrupts the planned panel layout. A salesperson suggested cutting the vent stack down to 4" to place the panels over it. This seemed like a good idea at first, but after doing some research, I'm worried that cutting the vent could affect its function. I've heard that some homeowners choose to relocate the vent to a different part of the roof instead. I'm handy but know there's more to vent stacks than just having them poke through the roof. Any advice on what's possible here would be greatly appreciated!
3 Answers
Relocating the vent is usually your best bet. It doesn't take that much work—just add an elbow and patch the old hole in the roof. Cutting the vent can sometimes lead to issues with airflow and local code compliance, so it's often safer to relocate it properly. You’ll find that most inspectors are more accepting of a relocated vent than one that's cut.
You can definitely work around the vent stack! There are extensions available to raise the vent above the panels. It's usually not a problem as long as you maintain some clearance, but be aware that local building inspectors might have specific rules about vent heights. It's worth checking out the regulations in your area before you go ahead.
Thanks for this! I'll look into those extensions and see what my local inspector thinks.
While you could cut the vent stack, it's generally not a recommended option. This can interfere with its venting abilities and even harm the panels. If you do consider it, make sure you have adequate clearance below the panels. Alternatively, using an air admittance valve might help, but check local codes first. It’s always a safer choice to work with the vent rather than against it.
Thanks for the heads up! I think I prefer relocating it if it's less hassle with codes.