Our home was built in 1960. We moved in 4 years ago with a relatively new roof. We have since had issues with ice dams and mold in our attic. We've had several roofers come to inspect and advise. It is our understanding that we have several issues:
1. Not a true ridge vent
2. No soffit vents
3. poorly flashed valley where the addition meets the main house
We do have two gable vents.
The plan is to put in a new ridge vent, add soffit vents and install a power vent with therm/humidstat. The mold will be removed and we are replacing all of the insulation.
1. Is this adequate or too much/too little?
2. What size power vent would be recommended for 800 sq ft.?
3. Any other considerations?
Thanks for the comments!