My concern is that the attic is not adequately ventilated. I'm not sure that enough air is getting through the siding vents, then through the plywood 4x8 holes. There is about 1/2 to 1 inch gap between siding and original plywood soffit. I want to make sure the airflow is good enough to ventilate the attic and help lower my energy bills.
The attic insulation is OK-I plan on adding some more.
What I am thinking about doing is removing the ventilated siding panels (maybe not all of them), then cutting out more sections of the original plywood soffit directly above the siding vent. Hopefully, this would allow more airflow through the attic. The roof has 4 wind powered turbines, and I may add 2 more.
Removing and re-installing the siding sections should not be a problem. The house is about 2300 sq ft living area and was built in mid 70s.
I just wanted to get some opinions on whether the additional soffit vents in the plywood would increase the attic airflow.