Freedom of design

Aluminium: the material of the future.

Aluminium roofs and façades are nothing new. Aluminium covered the first roofs as early as the end of the 19th century. The church of San Gioacchiono in Rome is just one of many examples of the use of aluminium as a roof covering. Initially, the material was mainly used for churches and industrial buildings with large roof areas. Over time, it became more common to use it for residential buildings, particularly when renovating old buildings. The reasons for this were clear - there are major advantages in using this light metal.

Aluminium proves its worth as a material, not only because it is relatively light and thus scales down structural and substructural requirements. A further plus point is the ability to create unusual and unique roof shapes. In addition to its great look, an aluminium roof is also a cost-effective alternative: costs are saved in the long term, thanks to its longevity, stability and suitability for a material mix. With its professional finish, an aluminium roof needs almost no maintenance at all.

Plain rolled aluminium reacts with the oxygen in the air to form a resistant protective layer
that becomes harder and harder the older it gets and that renews itself if it is damaged by external effects. Colour coating makes it possible to adapt the roof to the environment. This coating provides further benefits, as its corrosion resistance protects it from environmental influences such as acid rain.

Aluminium as a material

The roof itself is covered in aluminium sheets with different cross-sections and profiles. Strips of high-quality aluminium alloy (0.7 mm thick) are applied as the base material, with various paint coats applied underneath in the coil coating process (already stove-enamelled for hardening purposes). The aluminium strips can be processed to form shingles, rhombuses (roof rhomboid panel) or tiles, or can be used unprocessed as simple roofing. Aluminium roofs can be created up to a roof pitch of less than 10 degrees.

Advantages:

  • Low intrinsic weight: At only 2.3 to 2.6 kg/m², the low intrinsic weight of aluminium makes it ideal for use in roof renovation. Its incredible lightness often results in cost-savings for renovations, as it means that old or weak roof trusses do not require extra reinforcement.

  • Extremely long-lasting: Aluminium has a natural protective layer that prevents corrosion and therefore cannot rust. Constantly renewing itself, the protective layer on aluminium is a chemical phenomenon: aluminium reacts with the oxygen in the air to form a natural thin oxide layer that provides superb protection, even against bitumen corrosion. A damaged roof or façade membrane made from aluminium will always regenerate itself. The aluminium supports are also protected with two-layer stove enamelling. PREFA offers a material guarantee of up to 40 years in most countries.

  • Highly storm-proof: A PREFA roof can withstand high storms, thanks to its indirect concealed fixings and half-bond installation. In extremely exposed positions, storm resistance can be further enhanced by using more lead tacks. Nevertheless, some elements may need to be replaced by an expert where necessary.

  • Extremely environmentally friendly: Aluminium is also an ideal material from an ecological point of view. It can be used again and again and does not lose its specific properties, even after being recycled numerous times. Aluminium truly earns its reputation of being "100% recyclable".

  • Multiple design options: PREFA roof systems have been in use for years, mainly for private detached and semi-detached houses, communal residential buildings and social functional buildings. In theory, you can create any roof shape with the extensive range of PREFA products. Trained installation companies can also construct roofs with low pitches or complicated dormers. PREFA offers its products in nine standard colours and two different surface finishes (smooth and stucco).