eepete
Platinum Member
Our garage has 2x6 walls with fiberglass (R19). It's on a concrete slab on the ground. I got the minimum insulated doors, they also have a row of windows at the top. I think they were only 7/8" of insulation. I have an electric heater that kicks on at about 45 degrees in case a door is left open in the winter (the garage has a sprinkler system). Compared to our old house with un-insulated doors, the difference is amazing. The doors face south, so they get a lot of help in the day if the sun is out.
Here's a plot from the automation system of the outside temperature vs. garage temperature for the last 24 hours. You can see changes in the outside temperature as clouds come and go, and you can see changes in the garage temperature as cars come and go. The dip in garage temperature at about 15 hours is when a car went in at the end of the day. You can see the faster warm up as the day starts due to the south facing doors. You can also see the slower cool down at night, dropping about 7 degrees in 15 hours.
So in a picture, here's what insulated garage doors can do for you.
Pete
Here's a plot from the automation system of the outside temperature vs. garage temperature for the last 24 hours. You can see changes in the outside temperature as clouds come and go, and you can see changes in the garage temperature as cars come and go. The dip in garage temperature at about 15 hours is when a car went in at the end of the day. You can see the faster warm up as the day starts due to the south facing doors. You can also see the slower cool down at night, dropping about 7 degrees in 15 hours.
So in a picture, here's what insulated garage doors can do for you.
Pete