Hi,
I hope someone can help. I'm planning to use my garage as a workshop all year round and want to get an insulated garage door. I understand that there are 'R' and 'U' ratings associated with insulated garage doors and so asked one supplier what their doors are rated as. They sent me this explanation - "acknowledges the magnitudes of heat penetration rate U to the extent from 4,8 to 5,4 [W/m2k]".
Can someone tell me what the 'U' or 'R' rating is for this? Would the insulation in the door be good enough at keeping the cold out?
I found a useful table here https://www.doorsdoneright.net/r/ that lists R values, so I think I'd be looking at an R-8 and above.
Many thanks,
Alun
