Ill explain from the begining, since buying a house it came with a detached single concrete prefab garage with a metal roof.All was fine till the weather turned cold and the metal roof frosted over inside then when it thored it dripped all over my car.

My first attempt at curing this was to fit a tube heat on a thermostat that came on at 6 degrees and went off at 6.1 degrees.

Come the next cold night it did the same again so i bought a load of kingspan and fitted that to the roof but that didnt work either

Will a wood and felt roof cure this problem and im lossing sleep over my car getting wet???