Do you know that you can take 30% of the total amount of the insulation job off your income tax as a CREDIT? That's right off the top.

Considering this, the cost will be a lot cheaper and you will save some money on your electric bill, your garage will be cooler how much will depend on your individual home and you will stop the cracking of your garage and lanai ceilings over time. I used the Solar guys to add insulation and they do a great clean and thorough job.

Who's does this that some one has experiance with?

some one suggested Munns

I wish that they installed Factory insulated garage doors.

We did ours and lowered the temperature in the kitchen.

It really does not matter to me, I am only in the garage for less than a minute to drive out my car or golf cart.

Didn't work for me
 

I had my attic above garage done in a concrete house in Naples and it resulted in the garage being hotter! It held the heat in there making the space super hot all the time. I totally regretted doing it. Here in central Florida, my stick built house has blown in insulation and it's not too bad, probably because the garage door isn't insulated. The door in Naples was.

Your logic on your insulation is flawed. Correlation ≠ Causation

I do not doubt your temperature readings but it appears you do not like my temperature data … but it is factual. And it just demonstrates you are mistaking a correlation and that other factors are important

You call me a liar.
Now my logic is wrong.

You have no information on my garage, the attic temps, the garage temps, but you call me a liar and question my intelligence.

For the factual record, the difference between temps has exceeded 20 degrees on hot days............but I just conservatively stated up to 20.

I don't care about your reading, never debated your readings..............they might be true, I just know my reading are true.

You are without facts, so you make me laugh, despite.

Yes, 200 thinks he knows all and thinks .............. well, I won't say.

I've thought about it. But I don't see the value.

Your garage will not be cooler than the outside air for most of the time. If too hot, open the garage door to let the built up heat out.

If you want your garage to be cooler than the outside air, you need AC. How much time do you plan to spend in your garage? If not that much, why do you care?

I am following this thread with great interest. I am considering buying a hybrid or an EV, and garage temperature is a concern. Batteries do not like heat generally speaking. I have yet to find any information confirming that a hot garage is no good for lithium batteries. Anyway, this may be a reason for investing in garage heat abatement.

Both boys are in the south, and EV dealers strongly suggested to them to AC the garage for longer and better performance of EV. Since dealers don’t install AC might be worth looking into. Our garage is south facing and roughly 20 to 30° higher than any of our north facing garages that were in TV. Heat can destroy grips, club covers, anything with elastic. We store all our equipment batteries inside. We have insulated the doors, which has helped, but AC is next on the list. At this time we store all of our decorations and extra stuff in climate control unit. Worth the $50. Plus no climbing stairs, easy access. Once we AC garage will probably retain the unit.

One way to figure out if your garage door would benefit from adding insulation? If the sun hits it, touch the inside of the door. Is it hot? If yes, you would benefit from insulation. I like to keep things simple.

If your HVAC equipment is in a closet in the garage, most have a lot of available space where the water tank used to be placed before they started using tankless.
That space is indirectly cooled from the HVAC gear. Usually much cooler than the inside of the garage.
Great place for storing only the things that don't do well in the heat.

That is a great idea. Mine does not have space for a water heater, but it does have a little room.