Metal roofing can work well with the roof of an energy-efficient home, but on its own it does not provide thermal insulation. Heat loss is determined by the layers of the building envelope, their continuity and airtightness. PIR boards help achieve high thermal resistance with a smaller thickness. At the same time, thermal bridges, moisture and connections must be resolved. The low weight of the roofing is a structural advantage, not proof of low energy consumption. Tile-effect metal roofing or trapezoidal steel sheet protect the roof from precipitation and form its outer surface. Steel conducts heat well, so a thin sheet is not a thermal insulation layer. In a typical solution, the insulation is located below. Its position and thickness must result from the design of the entire building envelope, not from a declaration concerning the colour or profile of the sheet.

Protecting a metal roof against corrosion depends above all on whether the chosen coating suits the actual conditions around the building and beneath the covering. It is worth checking the coating's intended use, how edges and fixings are protected, and whether water can drain freely, rather than relying solely on the thickness of the coloured layer or the length of the guarantee. Moisture, contamination and lingering metal filings increase the risk. Regular inspection of details and prompt repair of minor damage using a method permitted for the given surface help catch problems at an early stage.