Aside from the fact steel is fully-recyclable and lasts a long time, another big benefit of steel siding is that it can accommodate all the insulation your home needs without bending, cracking, bowing, or warping. The material is also more resistant to the freeze/thaw cycle so there isn’t as much expansion and contraction during the hot & cold seasons.
Think of seamless steel siding as a strong, ultra-durable thermal blanket that reduces air infiltration. Indoors it means consistent, easier to control temperatures throughout the year.