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Garage door insulation
Posted on 4/22/26 at 1:19 pm
Posted on 4/22/26 at 1:19 pm
Been weatherizing my house and one of my open gaping sores is the heat in the garage.
I can insulate much of the ceiling from the attic access and I’m placing a better, more solid back door with weather strips. My problem is the garage door itself. It’s just metal and allows most of the heat in.
I heard there were DIY products that you can install on the back of the panels that won’t interfere with operation but have had trouble finding them online.
Also, if anyone is experienced with this, how much labor? How intense, and how many tools or other products are also involved?
And does it make enough of a difference to be worth it?
I can insulate much of the ceiling from the attic access and I’m placing a better, more solid back door with weather strips. My problem is the garage door itself. It’s just metal and allows most of the heat in.
I heard there were DIY products that you can install on the back of the panels that won’t interfere with operation but have had trouble finding them online.
Also, if anyone is experienced with this, how much labor? How intense, and how many tools or other products are also involved?
And does it make enough of a difference to be worth it?
5
Posted on 4/22/26 at 1:48 pm to tigahbruh
go to the depot and get the rigid foam insulation panels. Cut them to fit your door panels and tuck in between the door panel frame edges. Super easy
Posted on 4/22/26 at 2:56 pm to tigahbruh
I did mine a few months back. Took a few hours with minimum tools and skill.
Owens pink foam from Home Depot. A big square and sharp knife. Some patience.
My door is south facing in south Florida and it made a huge difference.
You will need to measure your pockets in your door to determine what thickness board you can use.
Owens pink foam from Home Depot. A big square and sharp knife. Some patience.
My door is south facing in south Florida and it made a huge difference.
You will need to measure your pockets in your door to determine what thickness board you can use.
Posted on 4/22/26 at 3:03 pm to LanierSpots
I went down the garage door insulation rabbit hole on youtube more times than I'll admit. Fortunately, we're building a new house and our builder insulates the doors.
I found this youtube video helpful. One thing that might matter - depending on the weight of the insulation, you might need to upgrade the springs.
Which Garage Door Insulation Works Best - youtube
I found this youtube video helpful. One thing that might matter - depending on the weight of the insulation, you might need to upgrade the springs.
Which Garage Door Insulation Works Best - youtube
Posted on 4/22/26 at 4:12 pm to tigahbruh
I did the same exact thing with the foam insulation boards, but I had some radiant barrier left over from a project in the attic and put it directly against the doors, then the foam boards. I don't know if the radiant barrier helped any, but the door project certainly helped with the heat
This post was edited on 4/22/26 at 4:13 pm
Posted on 4/22/26 at 4:41 pm to LanierSpots
Thanks.
These replies will help!
These replies will help!
Posted on 4/23/26 at 6:28 pm to cgrand
quote:
go to the depot and get the rigid foam insulation panels. Cut them to fit your door panels and tuck in between the door panel frame edges. Super easy
This is what I did also.
Posted on 4/27/26 at 2:50 pm to tigahbruh
I had foam board on mine at one time, and it did make a difference to where a window unit was able to cool the garage down to reasonable levels when I needed it.
Then, over time, I replaced each of the three doors with insulated doors, and that made a huge difference over the foam panels.
So, depending on how much insulating you need, and what it's worth to you, replacing the doors with insulated ones is an option.
Then, over time, I replaced each of the three doors with insulated doors, and that made a huge difference over the foam panels.
So, depending on how much insulating you need, and what it's worth to you, replacing the doors with insulated ones is an option.
Posted on 4/28/26 at 5:01 am to tigahbruh
Just remember that EPS (Expanded Polystyrene) and XPS (Extruded Polystyrene) insulation are both flammable. EPS is white foam. XPS is blue, pink, and green. In case you ever have sparks or an open flame in your garage.
I prefer Polyisocyanurate (polyiso or iso for short) insulation doesn't burn. Big selling point in my commercial/industrial roofing world.
Polyiso can be bought at roofing supply houses. Most big box home improvement stores won't have a good selection of thicknesses.
I prefer Polyisocyanurate (polyiso or iso for short) insulation doesn't burn. Big selling point in my commercial/industrial roofing world.
Polyiso can be bought at roofing supply houses. Most big box home improvement stores won't have a good selection of thicknesses.
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