Questions and answers: You can find detailed information about PREFA’s products as strong as a bull, here

Overall Information

Of course, a perfect product such as PREFA also has a perfect range of accessories, specially designed for each particular product.

With uncoated aluminium strips, the natural, rolled texture of the substrate material creates an attractive surface appearance. Due to the different rolling processes that substrate material can go through during production, the appearance of the rolled texture is not always uniform.

Aluminium materials are largely corrosion-resistant.

  1. Primary aluminium Aluminium is obtained from bauxite, an aluminium ore named after Les Baux – the place where it was discovered. Bauxit usually consists of up to 60% alumina, iron oxide and silica. It is mainly found in South America, Australia and Africa.
  2. Secondary aluminium Secondary aluminium consists of recycled aluminium and is recovered from scrap metal recycling. During preparation, only 5% of the extraction energy used to produce primary aluminium is used.

PREFA strips undergo surface treatment in a coil coating process in accordance with the ECCA (European Coil Coating Association). In the process, the strips go through up to 20 processing steps. After pre-treatment, primer is applied to both sides, and cured.

Fully supported metal sheet and strip for roofing, external cladding and internal lining – Product specification and requirements ” for PREFA products.

Depending on the product, we offer a 40-year guarantee on the base material against breakage, corrosion (rust) and frost damage, plus a 40-year colour guarantee against chipping, peeling, blistering and breaking.

Aluminium is compatible with most metals apart from copper. Therefore, it should not be used in flow paths underneath copper materials or installed next to copper.

As PREFA products do not rust or break, the roof is maintenance free in this respect.

Find more information about television aerials on the Electromagnetic interference page.

PREFA’s extensive range of colours includes numerous P.10-quality colours and many other standard colours. The wide range of shades offers architects, builders, restorers, planners and master builders countless possibilities for creating beautiful, high-quality roof coverings and façades.

Roof

Metal roofs can be integrated into the exterior lightning protection system in accordance with the standard ÖVE/ÖNORM EN 62305-3. PREFA flat band roof panels (Prefalz and Falzonal) are therefore permitted as a natural part of the arrester and PREFA small format components (roof tilesshingleroof panelsrhomboid roof tiles) as natural components of the conductor (installation of an additional arrester and connection to the earth). Some standards stipulate exceptions according to which, for example, property at increased risk (e.g. potentially explosive premises) must be specially designed. The integration of PREFA roof and façade systems in the exterior lightning protection system must therefore be planned depending on the specifics of property in question. Information on the necessity and type of lightning protection on a property can be obtained from a lightning protection system engineer or approved electrician. Find out more about lightning protection here.

Thanks to their light weight, PREFA roof tiles, shingles and rhomboid roof tiles, FX.12 roof panels are ideal for covering existing old roofs.

Small hail stones cannot damage a PREFA roof with a stucco surface. In the case of extremely large hail stones, as with all roofing materials, functional damage cannot be excluded. However, even in an extreme hail storm, the piercing of a PREFA roof can almost certainly be ruled out.

This is technically possible, however, as a manufacturer of ecological aluminium roofs, we do not recommend it. As most corrugated roof panels contain asbestos fibres which are harmful to health, care should be taken to prevent these fibres from being released into the environment.

The difference in sound between a PREFA roof and a fibre-cement or tile roof is just 2 to 4 dBA, which is barely perceptible to the human ear.

Aluminium materials are largely corrosion-resistant and rust-free!

Due to the increasing number of mobile phone users, questions about electromagnetic shielding to protect against the emanating radiation are increasingly being asked. As each radio communication is transmitted between sending and receiving devices, the number of transmission masts being erected in populated areas is growing.

In contrast to a warm roof, a cold roof has a ventilated channel between the roof covering and the thermal insulation.

For both new buildings and renovations of old roofs, the roof substructure must be checked for a properly installed PREFA roof. In doing so, attention must also be paid to the minimum roof pitches of the respective products.

The requirements for the substructure vary depending on the PREFA product.

It would be great if we could give you an overall price here or tell you that a roof tile or façade single costs such and such an amount. Unfortunately, it’s not that simple because each PREFA roof and façade needs to be carefully calculated by a specialist installer. Our professional roofers will give you an individual quote, tailored precisely to your requirements and the local conditions in which your house is located.

We recommend that you construct PREFA aluminium roofs with a ventilated substructure. The roof covering and thermal insulation layers are separated by a ventilated gap. The advantage of this is that occasional moisture is wicked away.

The roof and façade are parts of a building that are placed under particular strain by the weather. Sun, wind, rain and snow, as well as constant moisture (in wooded or shaded locations), have an impact on the building shell. Dirt deposits (e.g. dust, foliage or pine needles) can impair the function and the appearance of the roof, the façade or the roof drainage (e.g. blockage). It is therefore advisable to check roofs, façade cladding and roof drainage systems (gutters and downpipes) at regular intervals. This way, any emerging changes, damage or dirt can be identified and remedied in good time. You can find more information on cleaning and maintenance here.  

Only use original PREFA snow guards.

To ensure that our PREFA roof is installed and applied correctly, your roofing material will be delivered directly to the specialist installer (metal work specialist company). Only trained professionals know how to handle our material in the right way and have all the necessary tools to install it.

Façade

PREFA products cannot be purchased and assembled by end users themselves, as they are not suitable for self-installation. They are available exclusively through our trained specialist companies who also perform the proper installation. Our material and colour guarantee can only be used if the product has been installed by one of our partner companies.

PREFA is not a rendered façade. It is a high-quality aluminium façade which is installed as a non-bearing, rear-ventilated façade.

Fears of rusting are completely unfounded because aluminium cannot rust. If the surface of the PREFA aluminium façade is damaged, a new protective oxide layer is formed and the durability of the PREFA façade remains unchanged.

PREFA façades are installed as non-bearing, rear-ventilated façades. This means that there is a gap for rear ventilation between the aluminium façade cladding and the insulation. In summer, the hot air cannot accumulate behind the façade because it rises through the rear ventilation and is transported away. In the winter, this structure provides thermal protection, as the heat transfer resistance is increased in the rear-ventilated space. This temperature buffering in the rear-ventilated space ensures a comfortable indoor climate all year round.

The PREFA façade is the outermost protective layer of your house and simultaneously serves as a visual design element to improve the look of your home. Not only is it nice to look at, it also protects your home from the weather. In addition, durable PREFA aluminium cladding protects the underlying layers (supporting structure, insulation and substructure) from the effects of the weather. Owing to the fact that your PREFA façade is particularly weather-resistant, you can enjoy its beautiful appearance for decades.

It should be noted that PREFA façade products must not be confused with sandwich panels or other products with integrated insulation, as they are exclusively specialised for the functions mentioned above (protection and visual design). If you would also like to have a high-quality aluminium PREFA façade, the skilled workshop will be able to provide you with a suitable substructure and, if desired, suitable insulation in addition to improving the appearance of your home with PREFA façade cladding.

Non-bearing, rear-ventilated façades are designed to prevent moisture from forming. By separating the insulation and façade cladding, there is a constant air flow in the rear-ventilated space which regulates the moisture balance and ensures dryness. Thanks to the permanent ventilation, professional installation will not result in mould formation underneath the façade.

If the PREFA façade is installed properly, a perforated plate or ventilation grid will be installed at the ventilation inlet and outlet which protects against animals. As long as it is installed properly, small animals such as birds or mice will therefore be unable to damage your façade.

PREFA products are exclusively available through our trained, independent ‘partner companies’, who also perform the installation. This way, we can ensure that our products are installed properly. We offer regular training sessions for our tradesmen at the PREFA Academy, as we want to ensure that our products are handled with consistent quality.

Aluminium can be recycled 100% without loss of quality. In the recycling process, only 5% of the original manufacturing energy is required. PREFA largely uses recycled aluminium, which is also referred to as secondary aluminium. Therefore, aluminium is also an ideal material from an ecological point of view.

PREFA offers a 40-year colour and material guarantee on its products with the exceptional P.10 surface against breaking, corrosion (rust), frost damage, chipping and blistering.

PREFA does not supply PE cores in its aluminium composite panels. It uses high-quality FR cores. FR stands for ‘fire-retardant’ (reaction to fire classification according to EN 13501-1 ‘B-s1, d0’). In addition, PREFA aluminium composite panels are also supplied with a non-flammable A2 core. Details on the fire classification of PREFA façades can be found in the PREFA information sheet on fire protection.

Flood protection

PREFA’s mobile flood protection in the aluminium barrier panel system is used to protect buildings and land. It is a reliable water and mud barrier even in extreme situations – from the Danube to the North Sea. Lightweight, robust and easy to assemble, aluminium barrier panels are stacked on top of each other in a tongue and groove system and inserted between two fastening profiles or uprights – in an emergency, they can even be installed by just one person.

PREFA flood protection is supplied by a regional PREFA partner company and is also professionally assembled straight away.

The length is determined according to structural calculations and depends on the water level.

A flood protection system does not have to be 100% watertight. Minimal water ingress is acceptable. With the PREFA system, the aluminium profiles are stacked on top of each other in a tongue and groove system and inserted into fastening profiles or uprights on both sides.

The system requires a load-bearing assembly substrate such as concrete or brick and should be checked in advance by a structural engineer if necessary.

The PREFA flood protection system has been tested and certified by the European Flood Protection Association. It complies with the basic principles for planning and use of the guidelines of the Association of Engineers for Water Management, Waste Management and Land Improvement (BWK). 

Yes, delivery is possible in the standard RAL colours. The barrier panels and the permanently installed fastening profiles can be individually colour-matched to the roof, doors and windows or the façade.

The low weight of the aluminium profiles allows for quick and easy assembly – if necessary, even by just one person! For example, it takes around seven to ten minutes to assemble a flood barrier if it is the size of a garage door (approx. 3 m wide and 1 m high).

PREFA flood protection consists of a total of 10 components.