In the summer the upstairs gets extremely hot. We do have central air, but only one vent goes all the way upstairs, so it does not provide enough A/C. A window unit helps, but I am looking for some things to help keep it from getting so hot in the first place. I don't think that installing a new A/C vent is an option, at least until I have exhausted all other ideas.
We only have a few roof vents, so I would like to put some more vents in (maybe 3 on either side) to help let the hot air escape. The roof hangs over the house about 6" on either side, but I noticed that there are no open vents underneath these eaves. Are those vents critical for increasing the airflow out of the attic? I had one contractor look at the attic, and he did not recommend putting them in, but I was under the impression they would be very helpful.
Secondly, the insulation in the attic is extremely old. In fact, it looks like it is simply newspaper stuffed between the joists. Would ripping out the old insulation and putting in newer insulation help our problem or make it even worse?
Our heating bills in the winter and A/C bills in the summer are not expensive, which leads me to believe that our insulation (while old) is still working fine. So I am wondering if replacing the insulation is worth it if it won't help with the heat in the summer.
Any thoughts, suggestions or comments would be greatly appreciated.