I'm going to convert my screened porch to a 4 season room. It has a gable roof and is open to the living area. To properly insulate it, I was planning on vented soffit, ridge vent, insulation batts and ventilation baffles. How many baffles do I need? Between each rafter?
Also - do they need to go the length from soffit to ridge vent, or will one section at the bottom suffice?
I'm putting T and G right onto rafters for the finished ceiling.
The proper vent system will depend on how much & type of insullation. I recomend using a Smart Vent by DCI rather than soffit vents. It is not hard to install. It will cost more but is worth it in the long run. I manage a Large home improvement company and we use it all of the time. Email me and I will give you my phone number. I am more than happy to give you free advise over the phone. email@example.com