My situation is a bit unique and I'm unsure of how to tackle it. My current shop exists in a two car garage in a house that faces south-southwest. The heat in the afternoon is brutal this time a year. The rear wall and about 2/3rd's of one side wall on interior walls. All of the walls and garage doors are insulated. There is a small attic space above the front face of the house (5ft x 22ft). That is the only portion of the garage that is uninsulated.
I don't currently have the budget for a mini-split and, from what I understand, the small portable units don't work well in high humidity. I'm considering insulating and/or installing a gable fan in the small attic space, but I'm not sure which one I should try first. The gable area has a small window which would need to be replaced with a vent. If I insulate the attic area, should I insulate the wall, the attic floor, or both?
Thanks in advance.