I'm insulating my attic, removing the r11 and replacing it with r30. My concern is the venting. I have a finished room with 2 knee walls on both sides. There are 2 gable vents and a continuous ridge vent. Is that sufficient? My house only has soffit on one side only which is currently not vented.. What are my options in terms of properly venting this house? This has left me stumped! Thank you in advance!