A lightweight sheet metal roof covering can make renovation easier and reduce the weight of the outer roof layer. However, it does not mean that the assessment of the structure can be dispensed with. All layers, snow, wind and additional equipment must be taken into account. Low weight also brings benefits in transport, but long sheets still require careful handling. The choice should be based on the entire roof system, not just the kilograms of a single material. The weight depends on the steel thickness, profile and coating. For an example of tile-effect metal roofing cut to size, the data sheet gives approximately 4.7 kg/m². This is the value for a specific product, not for every roof sheet. A high structural sheet or thicker trapezoidal steel sheet may have a different weight.

The choice of snow guards depends above all on where snow is to be held back, not on the appearance of the lower roof edge alone. Check the roof pitch and slope length, the covering type and the places where lying snow could slide onto a path, terrace or driveway. The load-bearing capacity of the substrate and the way forces are transferred through the brackets also matter. A barrier at the gutter alone will not replace a considered layout, and retained snow still loads the roof.