Modernised LAMBDA® 25 roof panel has introduced a number of important improvements compared to previous version of the panel, provides exceptionally flexible roofing.

Technical specification

Height of hem: 25 mm
Effective width: 515 mm; 306 mm; 205 mm
Total width: ~547 mm; ~337 mm; ~236 mm
Thickness of steel sheet: 0,5 mm
Lenght of steel sheet: 8000 mm

Despite of the fact, that it has simple and universal profile, it can be individually tailored with regard to parameters such as: seam height, total width and  covering properties, as well as optional longitudinal pressing. 
Consequently, it is possible to create different styles of the roofing depending on the type of the building and its material, which makes the panel very suitable in applications, where traditional style needs to be emphasised, or when the bulding is given modern look.


Product features:

  • three width options,
  • optional notches for folding,
  • optional fold for the starting gutter flashing.


The locking joints of the LAMBDA® L25 panels may be cut on request in order to incorporate the folding for the starting flashing. 

Note! When ordering panel versions with notches for folding the starting gutter flashing [codes: LW], the production system automatically adds 30 mm to the ordered panel lengths.







The optional LAMBDA® L25 panel folding for the starting gutter flashing [codes: LWZ] increases installation speed and safety. it also positively affects the aesthetic value of the cladding (cut edge is not visible). 






Optional pressing (1 mm high):

Trapezium pressing: 58 mm width    

Trapezium pressing: 25 mm width

Semicircular pressing


Optional pressing (1 mm high):

Trapezium pressing: 58 mm width

Double trapezium pressing: 25 mm width

Double semicircular pressing




Coatings and colours

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  • High-pass membrane

    Roofing membranes are used as the base coating level beneath the inclined roofing. They prevent the wind from pushing rain and snow through to the thermal insulation and the roof construction. They protect from condensation forming under the base roofing. In addition, owing to their high vapour permeability, they keep the roof dry, which significantly decreases energy consumption.

  • Clamping systems

    Since these accessories constitute the integral part of the roof covering, they must meet the highest requirements.


    Ridge tiles and roof work are an inherent element of every properly executed roof covering. They provide protection against trickling and blowing and, simultaneously, they add an aesthetic value to the appearance of the roof.

  • Silicones

    The Profi Line roof work is a specially designed silicone mix, intended for the making of flexible joints between sheets, roof work, gutters etc. They come in the standard, universal colours: colourless, brown and red. They are recommended by experts.

  • Ventilation chimney

    Ventilation chimney – a unique structure, which can be adjusted to the roof inclination, in the 20-50 degree range, and combined both with the steel roofing tiles and trapezoid sheets.


    BLACHPROFIL 2® provides low- and high-processed steel material, used in the manufacture of a variety of products. We have a line for the cutting and splitting of flat metal sheets, as well as for recoiling steel coils.




    Application of a right gutter system allows for effective water discharge from roofing, which is vital for its durability and functionality. It also protects the building’s facade from damages caused by moisture.

  • Touch-up paints

    Touch-up paints are used to protect cut edges and any possible damages to the surface coating when installing. In addition to the protective function, they help to maintain the aesthetics of the roof in top shape.