That's really surprising. Every home I've had (3 in the last 8 years) has had them insulated, walls and ceiling. Guess maybe I just got lucky?
The few that I had seen were older homes. Haven't seen a house less than 10-15 years old that has had it.
I've asked a lot of builders as to why and they explained that it's for 2 reasons.
1) why spend the added cost to insulate something that 90% of the people won't need climate controlled.
2)garages are exposed to way more moisture due to pulling in vehicles that are constantly wet and putting off vapors. Insulation holds in moisture.
That's what I've been told and really when you think about it, makes sense.
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