Insulation on garage door

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Does putting insulation on garage door really keep your house cooler. Has anyone tried it. I have a two story house and my bedroom is above the garage. It was 91° upstairs. Needless to say the A.C. was turned on last night.

  8 answers
  • Gk Gk on Apr 28, 2018
    My entire garage is insulated. It stays very cool all the time until the temps reach into the 90's and even then the temps still range in the 70's. And it stays much warmer in the winter--even in temperatures in the 30 below range--usually around zero degrees in that bitter cold.
  • Yes it does help, but you really need to insulate the entire garage for it to be effective. Worth the upfront cost, as your heating bills in winter and cooling costs in summer will be much less - every month. Another thing to consider are attic fans. I had some installed when I replaced the roof. Amazing! And another thing that helps with your heating and cooling costs. The last thing to consider are your windows, if not new, think about upgrading when you can. Windows and doors are the number one cause for heat and a/c loss. I am doing my house one side at a time, will take 3-4 years to complete.
  • Tae Tae on Apr 28, 2018
    I dobt think it does. We have it in our garage and the previous owners added some to the door but I don’t notice a big difference.
  • William William on Apr 28, 2018
    It will help keep the garage warmer or cooler depending the season. Won't affect the rest of the house. Bedroom floor above the garage has to be sealed and insulated by building codes when the house was built. There can't be any air movement between an attached garage and main living space for safety sake.
  • Betsy Betsy on Apr 28, 2018
    Well, heat rises, so, unfortunately, it's going to be really hot:( One thing a lot of people do is to put a fan in the window and have the air blowing in. It should blow out to take the hot air out of the room. There are little window fans that have 2 fans in them. They can be adjusted to either blow in or out, or one in and one out. I've used these, 1 in and 1 out to recirculate the air, and it worked quite well. Mine is a Holmes Basic Window Fan, and costs around $25 at Target and Walmart. Maybe even use an oscillating fan in conjunction with the window fans. Good luck, I'm freezing here in Michigan today:)
  • Betsy Betsy on Apr 29, 2018
    You are welcome. Good luck getting cool.
  • Lifestyles Homes Lifestyles Homes on Jan 15, 2021

    Yes, insulated garage doors are worth the money, but as noted above- the whole garage ceiling has to be insulated.

    If your garage ceiling is already drywalled, I’d install 2 layers of sheet foam insulation with the seams taped and staggered. That’ll get you at least a R-11, maybe higher depending on what you buy.

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