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 the main component, is mainly valued for its mechanical stability and load-bearing capacity. Applying a thin coating of zinc protects the steel from rusting. About half the world’s zinc yield is used for galvanization and thus for corrosion protection.


Overview of properties and benefits:

  • Low cost
  • High mechanical stability
  • High load-bearing capacity
  • Solderable
  • Reusable
  • Recyclable
  • Low tendency towards deformity and corrugation
  • Low susceptibility to errors in installation and construction
  • Can be coated in many different colors

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

Surface weight

Assembly of metals