Detached Brick Garage Insulation

[imgn tht]

I have a small 2 car detached brick garage in Northern IL. Interior walls are cinder block and I have ZERO intention of changing or adding to them for insulation. Just too narrow with vehicles we have to lose any more space. They are painted and I consider them finished at this point.

That being said, was wondering if adding insulation to the ceiling and backside of the garage door would make any difference at all to the overall warmth in the winter? Or if doing so and ignoring the walls would just be a waste of money and time?

The garage is essentially just a place for cars, and other typical garage storage use. From time to time I do go out there to work on a project or car maintenance in the winter. I have a portable propane heater to take the chill out for those occasions. Attached is a picture of the ceiling for reference. Thanks all.

 

[The Cobbler]

it will help . a lot of heat loss/gain is thru the ceiling.

 

[wssix99]

I would not invest a lot of money. Your walls are R 0.8, so heat will run right out of them quickly even if you have something high quality on the roof.

Attaching foam board between the trusses, directly to the bottom of the roof might be an inexpensive way to get a little help. (I would not use anything heavier duty than that.)

 

[billconner]

I believe it would make a substantial difference. Kraft paper faced fibreglass between rafters would be least expensive. Most foam exposed would be a fire hazard and technically not permitted by codes. Poly-iso is permitted, and is most expensive.

You said brick and then block. Is it brick veneer on block walls, and what is thickness of block? While not much insulation, it is slow to transfer.

I think you'd notice a big difference with roof insulated. Better if you could add an air battier inside insulation. Convection - air blowing through - is greatest heat loss, followed by radiation and then conduction.

I can't speak to overhead door. No experience with weight and operation.

Add a little heat for when you work and it will make a big difference.