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TRI-L thermal insulation doors


These doors and gates are suitable for use in all commercial and industrial buildings, particularly for exteriors. The multi-purpose TRI-L series doors and gates are intended for heavy-duty operation mainly as exterior doors in industrial and business buildings. They are robust, structurally stable, weather resistant.



We offer steel double-faced design doors. The door face is made of sheet-metal of thickness 1.5 mm with a thin pressed welt. The door panel is made of mineral wool. It is possible to choose from the single-wing or double-wing design. We can supply the thermal insulation doors in full or partially glazed design.

TRI-L thermal insulation doors TRI-L thermal insulation doors


We classify our doors according to the structure and attained heat transmittance coefficient:

STANDARD version EXKLUZIV version PASIV version
Uw =1,7 Wm2K-1
with a wing thickness of 53 mm
Uw =1,5 Wm2K-1
suitable for buildings with higher requirements in terms of thermal characteristics
Uw =1,1 Wm2K-1
suitable for passive buildings


An obvious aspect is double protection against corrosion by hot galvanising and Komaxit powder coating in shades according to the RAL scale. The doors can also be supplied in stainless steel design.


Door frame:

The wings can be fitted into the system door frame of design: block/lined/corner

TRI-L thermal insulation doors TRI-L thermal insulation doors


Door equipment:

  • security fittings
  • panic fittings
  • maintenance free heavy-duty hinges with stainless steel cover
  • self-closing device
  • drop threshold strip or sealing brush
  • ventilation grille


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