I live in Ohio and have created a golf stimulator in my attached garage. The garage typically stays around 10 degrees warmer than the outside without wall insulation except the interior wall.

I can raise the temperature with a 4000 watt electric heater another 20 degrees. The ceiling and walls are all finished with drywall.

What will provide better heat retention? Insulating the walls would be a big project; one that I want to avoid. I weather stripped the exterior garage door and that helped quite a bit. I suspect the priority should be the ceiling, then the door.

  • I use a torpedo heater in my minnesota garage without insultation and it works fine. – John Peters Feb 14 '16 at 6:30
  • I have enough tools in the garage that I don't want to risk the moisture byproduct of the burning fuel rusting everything. Plus, dealing with the propane tanks is a pain. I also need to have a heater up on the ceiling, as I have two little ones. – Evil Elf Feb 14 '16 at 14:23

Insulating a garage door is really quite easy. There are kits on the market here in the UK but I just used cellotex (foam sheet) because I had some lying around. A steel door has even less insulation value than a drywall-lined ceiling.

I'd do the door first as the least effort to get a noticable return.

| improve this answer | |

Seeing as heat rises, and you don't want to get into the walls, I would recommend insulating your attic if you want maximum effect.

If the attic is not used for storage and is relatively easy to navigate, I would recommend:

  • cover any electrical boxes
  • install durovent panes if needed for existing soffit vents
  • stuff R30 at the base of the durovents to retain loose insulation
  • blow in insulation
| improve this answer | |

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Not the answer you're looking for? Browse other questions tagged or ask your own question.