Retro Fit Soffit Vent Ideas – GreenBuildingAdvisor

Hi all,

I’m looking for advice on adding soffit ventilation. My attic was originally built as an unvented space with spray foam insulation, but we’re now transitioning to a traditional vented attic with ridge vents and soffit vents.

We’re removing the spray foam, replacing the roof, and installing ridge vents. The challenge is how to properly install soffit vents in existing Hardie soffit boards.

Any tips or best practices for venting through Hardie soffits?

Thanks!