Thanks for all the feedback. From what I can see, if you have the sun beating on your garage doors in the afternoon like I do, Insulating the garage door and tinting the windows if you have them is probably where to spend the money.
When I measure my garage ceiling with an infrared temperature probe I don't see much heat gain coming from the ceiling because my solar attic fans are keeping my attic from super heating. So my guess is the non-insulated garage attic is transferring some of the heat from the garage is going through the ceiling and the fans are blowing the heat out. If I didn't have the fans then the attic would super heat and the garage would get heat gain from the ceiling so then insulation would fix that.
I have R38 in my main attic so adding 4 more inches to make sure it's all leveled out an there are no missed spots will increase it to R50 which will be more than enough. Again, i'm not doing this to save money eventhough there should be some small savings over time but for the piece of mind that the insulation is better than what i have now and it's done correctly. BTW, I know the Solar Guys may be more expensive than hiring a handyman to do the work but I've had them install insulation over my Lanai and they don't hire kids to do the work. They knew what they were doing, I didn't hear any banging in the attic while the work was being done and I could see all the insulation going into the attic. They are also licensed and insured. You get what you pay for.
And shoutout to D'Angelo inspections for their advice!! Thank you!
|