Insulating Garage Door

[Tarhead]

Got to make a decision on how to insulate my garage door. It will be hot soon. My plan is to put 1" styrofoam (or some type of foam sheet product) on it. Any options other than styrofoam? There is a flame retardant paint I have seen referenced. Has anyone used such a thing to keep it from expoding in a fire? Is the foil faced product better from a fire/insulating perspective? How should I attach it? Liquid nails? I can't wedge it in because the inside face is fairly smooth...ie: no horizontal rails.
Thanks for any advice.
Mark

[DaveO]

Mark, IIRC there was some really good information/advice presented in this thread - http://www.ncwoodworker.net/forums/s...oor+insulation
You might find some answers there...or maybe just some more questions

Dave

[thrytis]

I can't find a reference now, but someone does make a fire resistant foam insulation, or at least one side has a fire resistant coating on it.

[jlwest]

Mark,
I did my door with styrofoam board and it worked great. I was able to double it up and used liquid nails to hold it in place.

Jeff

[Tarhead]

Thanks for the responses!
Here's what I've learned:
Thermax by Dow: http://www.dow.com/styrofoam/na/thermax/whychoose.htm
is the only fire resistant foam panel with a decent rating. It comes white or foil faced with a 1.25 mil (light duty) or 4 mil (heavy duty) aluminium face. The white faced version can be joined with a white tape and result in a finished appearance for a utility space. The 1" has an R value of 6.5 and 1.5" has an R value of 9.8. It can be attached to the wall/ceiling/door with any of the foamboard adhesives.
Initial quote from the first place on the light duty, 1.5" foil faced is $37.50/ 4/8 sheet. Waiting for a quote from the second place. I've decided that since my wife no longer parks in the garage we can go with the light duty (she forgot to raise the garage door before backing out one time )

[LeftyTom]

Originally Posted by jlwest

Mark,
I did my door with styrofoam board and it worked great. I was able to double it up and used liquid nails to hold it in place.

Jeff

+1 I used styrofoam boads with good results on the garage side of my basement.

[Rocker]

Tarhead,
You might want to try the Insulfoam garage door insulation kit. I ordered three of them from
Insulfoam,
Anderson, SC.
Tele: 864 224 0900, select option #1 Customer Service.
Their kits cost $65 + $20 UPS charge for shipping.

This insulation is a foam that has white plastic on the exposed side. I'm not sure of the R value, but I'm pretty sure it is equivalent to Thermax.
Regards,
Rocker

[thrytis]

I checked with the Todd Culp, Cabarrus County building inspector regarding using exposed foam insulation on garage doors. He confirmed that the insulation has to be covered.

My test with plastic primer seemed to hold okay to the foil on the foam, so i think i'm going to pick up some Flamestop and prime and paint my door. I wish i had known about the Thermax before... it probably would have been less work.

[Tarhead]

Thanks Eric!
Dry Dog in Indian Trail also has Thermax and better prices. $28 for a 1.5" foil faced 4X8 panel. No one in the Charlotte area carries the white faced version. I'll probably go with this next week when I get back from the left coast.

[MikeH]

Originally Posted by Tarhead

Thanks Eric!
Dry Dog in Indian Trail also has Thermax and better prices. $28 for a 1.5" foil faced 4X8 panel. No one in the Charlotte area carries the white faced version. I'll probably go with this next week when I get back from the left coast.

Mark would you happen to have the website and contact info for Dry Dog?

[Tarhead]

704-334-8222 Lindsay is the manager.
http://www.drydogbarriers.com/index.htm

[MikeH]

Thanks!