While steel sheds are incredibly durable, they may not be classed as energy efficient.
The roof on a metal shed will absorb the heat from the sun, in turn, causing the shed’s interior to heat up. Waterproofing a metal shed lowers the surface temperature of the roof and reduces the cooling costs.
If you fail to waterproof any metal roof, moisture will be allowed to seep under the roof and cause internal corrosion. Waterproof a metal roof a few months after installing the roof to protect it and reduce energy costs.