In this case you would want to insulate the garage.
Insulating attic space above garage.
For diy attic insulation you ve got two choices.
Take the insulation up to your attic so that you are above the garage ceiling.
In unfinished attic spaces insulate between and over the floor joists to seal off living spaces below.
On the same hand if there is a bedroom above the garage and not an attic the same concept applies.
Insulating the area in the attic over a garage might keep the temperature a little more stable in the garage but it does little to reduce the amount of energy needed to heat and cool your house so it s not a good investment of your energy dollars.
Once you ve decided which type is best for you examine the material options and prices to home in on the right product.
If you re using your garage enough to warrant installing a heater and or air conditioner by all means you should insulate the ceiling between the garage and an unfinished attic space above.
When you should insulate the garage if your home s hvac system does extend into the garage then the attic above it should be insulated as it would for any other room of the house.
Insulating a garage makes sense if you re planning to heat the space.
When it comes to choosing materials you can use the same types of insulation used on the rest of the house but some are better than others depending on whether the garage is finished or not.
Loose fill or batt the common term for blanket insulation.
1a attic access door.
Adding insulation to a garage will help moderate temperature extremes particularly if the garage space is attached to a house.
Take up the floor allowing you to see the joists.
If the air distribution is in the attic space then consider insulating the rafters to move the distribution into the conditioned space.
Many garages have an attic above them.
Both can be added to uninsulated attics or layered over existing material.
This is particularly imnportant if you have heating and air in the garage.
Insulating an attached garage may help lower heating and cooling costs since it provides a buffer space between the home s interior and the outdoors.
For example heating and air can come from clothes driers.
You should have a vapor barrier between the insulation and the ceiling of your garage.
Building codes differ by jurisdiction so be sure to check your.
But what many may not know is an uninsulated attic drains energy and money.