Hi. I am inthe processes of trying to lower my energy bill. I have a new hvac system and it is running full out and my house is still 80 on the inside. I had to cut attic access and when i did i found as iexcpected i have no insulation. So in the process of preping it to blow in insulation i discovered that i have absolutly no ventulation at all up there. So my questions is which would have more bang for the buck. Should i go ahead and put into insulation first or ventulation first. For money reasons i cant do both right now but will go back later and do the other when i can.