When we moved into the house we live in there was literally no insulation in the attic. We have a 4 1/2 pitch roof. We live in Texas and our first electric bill in a 1450sf house was almost $500. Of course, this sent us reeling. The only attic ventilation is through gable vents. A friend blew in 3' deep insulation. Our electric bill dropped over $300 the next month to about $150. Now, due to hail season we are going to replace the roof. I have had as many ideas on how to best accomplish attic ventilation as I have had contract proposals from roofers. I understand the best way to ventilate is with soffit vents all around the house. I have a problem with this. The pitch of the roof together with the depth of the insulation make any attic access from the inside impossible. The depth of the insulation comes to the bottom of the gable vents. The soffits are closed. I hate turbine vents. I am looking for a balance of cost effectiveness and the best way to accomplish correct ventilation.
Given the small cubic footage of attic air, is it more feasible to install a ridge vent (roofline is about 45' long with two 15' ridges in the front of the house ... gable vents only on the 2 ends of the house) or power vent(s) since there is not much airflow moving upward naturally. Also, is it possible to install soffit baffles from the outside of the house? As I said, it is impossible to access the attic to staple the edges. The decking is shiplapped planks not plywood. Would it be possible (and not too much trouble) during the tear-off of the roof to temporarily remove planking and install the baffles by reaching through the openings from the outside, or does anyone have a suggestion on how to poke some kind of baffle up through a hole in the soffit from the outside (maybe something like pcv pipe or something similar? I have been told that without some kind of power ventilation in the center of the ridgeline or soffit baffles there will be stagnant air in the center of the house and the overall ventilation will not work properly.
Today the outside temperature was about 90°F and the attic temperature was about 150°F.