Praughfet t1_j6kby6q wrote on January 30, 2023 at 10:56 PM

unless your garage is heated, there is no need for insulation on the door at all.

ValidGarry t1_j6kfwet wrote on January 30, 2023 at 11:23 PM

There probably is. Most FROG (finished room over garage) are badly designed and built. They don't usually have very good insulation. Therefore, having better insulation and airtightness in the garage pays back.

You can get specific poly insulation for garage doors. It's cheap and light. Shop around for something designed for the job rather than a DIY bodge which it sounds like you have.

Praughfet t1_j6khhfm wrote on January 30, 2023 at 11:34 PM

this is more of a case of more info needed then something cut and dry.. the facts are, the best way to keep a room over a garage warmer is to add heat to the garage, which in alot of places , can only be done with electric heat, which is very costly, or by spray foaming or having blown in insulation installed in teh garage ceiling, The reason rooms over garages are cold is because the heat move downwards. So limiting the heat transfer that way, is FAR more cost effective then trying to keep the garage a few degrees warmer., which is all treating the door will do.

ValidGarry t1_j6kk1i7 wrote on January 30, 2023 at 11:52 PM

Also, a lot of people like to use the garage as additional space.
I do agree on the best way to improve the room is to insulate between the garage and the room, but that's a much bigger job.
I have my garage door insulated to also reduce heat gain in the summer. The door is South facing so heats up really badly in the summer. Some people just like the garage to be more usable space year round, so insulating the door may well be useful for lots of reasons.