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Retro Panel 25

Blachotrapez

A classic seamed steel roof with a fine, retro-inspired rib — the timeless choice for older and listed properties.

Retro Panel 25 is a seamed steel panel with a 25 mm rounded rib, giving the roof a classic, timeless look — perfect for older houses, farms, and properties where a traditional appearance matters.

The panels are seamed together directly on the roof with no visible screws, giving a clean, continuous surface and excellent watertightness even at low roof pitches. The galvanised steel core and Pural coating ensure long-lasting durability in Danish weather.

Advantages

  • Classic, retro-inspired rib profile for older and listed properties
  • Seamed directly together on the roof — no visible screws
  • Excellent watertightness even at low roof pitches
  • Galvanised steel core built to last in Danish weather
  • A timeless look that suits both renovation and new builds

Why choose this panel

We focused on elegant design, durability, and economy.

The combination of these features in a single product creates many possibilities for shaping the image of the roof surface. Depending on the desired effect, you can highlight the traditional style of a building or stress its modern character. Its traditional and minimalist image, along with its simple form, make the RETRO roof panel the ideal choice both for renovation of historic buildings and modern building construction, as well as religious and public utility buildings. Contemporary architecture makes a twofold use of it: it can fulfil the role of a roofing material, but it can also constitute an original finish of the façade, in either a horizontal or vertical orientation.

Simple and quick assembly, high aesthetics of the roofing

Equipping the panels with a snap lock allows for quick and reliable joining while maintaining high tightness, which gives them an advantage over double-seam sheets. The mounting holes along the seam allow the mounting screws to be covered by the adjacent panel, positively affecting the aesthetics of the roofing. Increased rigidity allows the panel to be laid directly on roof battens, bypassing full roof sheathing. An additional advantage is the option of a roof panel with the Hydrocontrol system, which provides effective protection against moisture.

Hydrocontrol system

Pros of using the Hydrocontrol system: it absorbs moisture occurring on the inside of the roofing, due to condensation of water vapour; it gives additional corrosion protection, especially in buildings with an active chemical environment (e.g. livestock stables); it has higher strength than standard insulation and vapour barriers and is resistant to mechanical damage without degrading; it is easy to keep clean (with standard equipment, e.g. a hose or pressure washer); it raises the roof sound-insulation level; and it is non-flammable and resistant to bacterial degradation.

Specifications

Material
Galvanised steel
Total width
approx. 239 / 340 / 554 mm
Actual roofing width
209 / 309 / 521 mm
Finished product thickness (steel)
0.5 mm
Finished product thickness (aluminium)
0.6 mm
Seam height
25 mm
"Click" height
19 mm
Minimum sheet length
1,400 mm
Recommended length
max. 8 m
Minimum roof slope
9°
Installation
Seamed together on the roof — no visible screws

Drawing

Tagplade — LB Bygger

Colours

MAT-TK — 45-year warrantyFrom 149.00 DKK/m²

A classic polyester coating on hot-dip galvanised steel: the steel core is protected on both sides against corrosion, then finished with a primer and an organic polyester topcoat that gives the panel its colour, texture, and weather resistance. It is the most widely used coating system on the market — durable and cost-effective.

Thickness
25 μm
Corrosion class
C3
Perforation warranty
45 years
Colour warranty
10 years
Chrome GreenRAL 6020
Copper BrownRAL 8004
Oxide RedRAL 3009
Grey BrownRAL 8019
Anthracite GreyRAL 7016
Graphite GreyRAL 7024
BlackRAL 9005
Chocolate BrownRAL 8017

MAT PLUSS — 60-year warrantyFrom 157.75 DKK/m²

A coarse-grained, two-layer Pladur® Wrinkle Mat finish that meets fire class A2 and can be used in the higher C4 corrosion category (EN ISO 12944). The textured matte finish also hides minor surface waviness better than a smooth coating.

Thickness
35 μm
Corrosion class
C4
Perforation warranty
60 years
Colour warranty
15 years
Anthracite GreyRAL 7016
Grey BrownRAL 8019
BlackRAL 9005

3D presentation

Downloads

Download technical datasheet (PDF)

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