Guys I've got a question on blown in insulation. I've seen houses getting it while I was delivering the mail & some houses are the same type as mine, a Ranch house with a full basement. They cut holes on the outside under the siding at about 1-1/2' above the foundation and again near the top of the roof.We also want to do this. We also are going to have blown in added in our attic. I've seen episodes of "Holmes on Homes" where insulation didn't let the roof breath & the sheathing got covered in condensation which caused massive mold & rot he said If I remember right they should have had baffles so the soffitt's could breath.
1. Why cut two sets of holes?
2. with a Ranch house with a full basement we have no soffits so how will / does the roof breath.?
3. How do we know when to use those roof baffles & where to correctly place them?
I know there is more questions I should ask but I don't know the correct questions to ask you guys. Any help or advice is greatly appreciated.