Replies

1. Expert Member
   Dana Dorsett|Dec 21, 2020 05:12pm|#1

   It depends on the door's design. Can you post a picture?

2. 
   Charlie Sullivan|Dec 21, 2020 05:18pm|#2

   Buying foam insulation boards, cutting them, and gluing them to the door is cheaper and gives you more options than buying a garage door insulation kit. Leaving foam exposed is considered a fire hazard, and is often against code, but it's not clear that it's a major hazard or an actual code issue on a garage door. "Themax" polyiso insulation carries the best fire rating of any foam board insulation, so that could be a good choice. You could also use mineral wool boards, but then you'll most likely get condensation in the inside surface of the steel. A thin mineral wool board over a thick foam board would be more fire safe than foam alone and might avoid the condensation problem, if the foam is thicker than the mineral wool. But I don't know that you can get thin mineral wool boards, and I also don't know how you'd attach them.

   So probably "thermax" polyiso is the way to go.

3. 
   John Clark|Dec 22, 2020 07:56am|#3

   The best garage door is one which isn't leaky around the edges.

4. GBA Editor
   Kiley Jacques|2020年12月22日12:25pm|#4

   Hi Jasmine,

   Here are a few Q&A threads with links to resources that might help inform your course of action:Ideal garage door insulationandGarage door insulation.