Lack of Roof/Wall Insulation

What happens here

The mini shop's metal roof and walls were installed without any insulation. This leads to significant condensation build-up ('sweating') on the ceiling and walls, causing water to drip inside the building and potentially damage stored items. The host notes that a simple 'bubble wrap type insulation' would have prevented this, and while it's an inexpensive upgrade during construction, retrofitting it later will be costly.

Goal: Insulate metal buildings to prevent condensation and moisture damage.