Insulating garage doors

[A930Rocket]

Our garage doors are non insulated and in the sun all day long. I’ve got about an inch of air gap to work with and was thinking of using blue board. The question is what to adhere the blue board to the garage door with. Some adhesives (liquid nail, etc) will melt the blue board, so anybody have any suggestions??

[masraum]

Do your door panels not have lips at the top and bottom on the inside? i thought most were essentially long flat C channel, and the insulation usually just slots into the channel.

[dad911]

I'd use the really good foil hvac tape to tape around the insulation to the aluminum channels.

Springs may need adjusting from added weight.

Having said that, kits for insulating garage doors are available.

[JackDidley]

I used 1/2 thick blue board. Double thick. 1/2 is flexible enough the it will bend and you can fit it in the panel tight. There are probably better ways but money was tight at the time I did it.

[A930Rocket]

Thanks guys, I’ve got a run by Lowe’s today and See what they have.

The garage doors do have channels, that would as help hold the insulation. In addition, because of hurricane requirements, there are extra horizontal bracing, that would help hold the insulation in.

[masraum]

Remember, you won't want to pull a car into the garage and then shut the door (maybe in the winter). If you do, you'll be trapping all of the heat from the motor in the garage, now for much longer than before.

[SCadaddle]

I'd try 3M Super 77 spray adhesive to both the blue board panels and the garage door before sticking them together.

[MBAtarga]

I installed vinyl covered insulation blankets that came as a kit from Dow - sold at HD/Lowes. I got them when they were on sale several years back. I've been impressed.

[A930Rocket]

Originally Posted by MBAtarga

I installed vinyl covered insulation blankets that came as a kit from Dow - sold at HD/Lowes. I got them when they were on sale several years back. I've been impressed.

I didn’t get a chance to go to the store, but I did see Lowe’s had those insulation kits and hope to go by there in the next couple of days.

Ms Rocket is out of town and I’ve been leaving the door between the garage and the house open with a squirrel cage blowing cool air into it. It wasn’t too bad today.

What was a killer, was working in the driveway last week and working on my Trailex Trailer. The feels like temperature was over 100° and in the hot sun.🥵 I’m going to replace the springs as soon as they come in and I may back the trailer into the garage. I won’t be able to close the door, but at least I’ll be in the shade.

[David]

I used pink insulating panels. There should be a little bit of a lip on the edges of the door panels. Cut the insulating panels to fit up into the door panel edges. Bend the foam panel to fit up into the door panel edges and you're done. No need to glue it in.

[A930Rocket]

When I go to Lowe’s, I was going to check the R values versus cost.

It’s a 16 x 8‘ door.

[David]

[rfuerst911sc]

Originally Posted by A930Rocket

Our garage doors are non insulated and in the sun all day long. I’ve got about an inch of air gap to work with and was thinking of using blue board. The question is what to adhere the blue board to the garage door with. Some adhesives (liquid nail, etc) will melt the blue board, so anybody have any suggestions??

There are construction adhesives in a caulk tube that are foam board friendly . You only need to spot adhere , no reason to go crazy heavy with the glue . I would go with 2 layers of 1/2 " foam board .

[fintstone]

I looked at the kits from Lowes. One is polystyrene panel/boards (pretty flammable) with an R-4.8 and the other by Corning is R-8 and vinyl-faced fiberglass (not flammable). I am thinking the latter might be the one I install (if it will fit). Neither is great but both are a big improvement (and the Corning kit is almost twice the R-value.

[fintstone]

I really don't care for the look of the Corning kit once installed though. Foam board looks a bit better to me. That said, double the value is probably worth the difference. See photo below (one of many from the reviews on the Home Depot website).

[fintstone]

There are other types with foil barriers on Amazon that claim to block radiant heat (from the sun better) ...but I was unable to find an R-value.

[unclebilly]

Silicon caulking will glue it in place. Then tape the edges.

[911 Rod]

I used the blue board with a bit of glue and the screwed thin plastic sheets on that were for printing.
It was a 1 piece door though.

[masraum]

Originally Posted by fintstone

I really don't care for the look of the Corning kit once installed though. Foam board looks a bit better to me. That said, double the value is probably worth the difference. See photo below (one of many from the reviews on the Home Depot website).

Now line that kit with foam board, and you'll have more R-value and a more attractive (and flammable) garage door!