Material properties

GRÖMO manufactures roof drainage accessories in five different materials with nine different surfaces. Only European vendors are used as suppliers. This guarantees high quality in the raw material, and is a prerequisite for the high quality standards of GRÖMO.

Galvanized steel

Galvanised steel

Steel, a metal alloy with iron as its main component, is primarily valued for its mechanical stability and load-bearing capacity. Applying a thin layer of zinc protects the steel from rust. Around half of the world’s zinc supply is used for galvanising and thus as corrosion protection.


Overview of properties and advantages:

  • Inexpensive
  • High mechanical stability
  • High load-bearing capacity
  • Can be soldered
  • Reusable
  • Recyclable
  • Low tendency towards deformation and wave formation
  • Low susceptibility to errors in laying and construction
  • Can be coated in many different colours

Melting point: 1.535 °C
Length variation at 100 K: 1,2 mm/m
Density: 7,86 kg/dm³

Surface weight

Assembly of metals