Hope this is the right subforum.
I have a1948 Garrison Colonial in Massachusetts. The attic has no soffits - only two windows on either side. During inspection, I was told it would be best to keep these open year round. Since buying the house, we have placed blown-in cellulose insulation in the floor of the attic (was uninsulated). I have also put in three vents in the roof to allow for air movement. The question is, with those vents, is it best to keep the windows on either end open year round? Other suggestions?