From barrel roofs to complex roof extensions, domes or large-scale roofs — PREFALZ offers countless individual design options. Folds and bends won’t affect the paint quality at all: PREFALZ is supplied in numerous colours with a smooth or stucco surface, as required.
PREFALZ coils can be ideally used as complementary coils for PREFA small-format products – suitable for various connections and flashings in the dimensions 0.70 × 1,000 mm (coil dimension 60 kg).
It should be particularly emphasised that the PREFALZ aluminium roof complies with reaction to fire classification “A1” – thus non-combustible - according to EN 13501-1. You will find more information on fire protection here.
PREFALZ benefits
For a wide range of applications
from curved arched roofs to complicated roof extensions, domed roofs, classic gable roofs or large-scale roofs
easy to work with, highly resilient
easy to work with even at low outside temperatures
40-year guarantee
on material and colour for products with P.10 surface
Fire protection
PREFALZ non-combustible (A1)
For a wide range of applications
from curved arched roofs to complicated roof extensions, domed roofs, classic gable roofs or large-scale roofs
easy to work with, highly resilient
easy to work with even at low outside temperatures
40-year guarantee
on material and colour for products with P.10 surface
Fire protection
PREFALZ non-combustible (A1)
Complete system
Extensive and coordinated system accessories, ensure safety and durability
Numerous design options
Very wide selection of standard colours as well as smooth and stucco surface, suitable for PREFA’s complete system
Environmentally friendly
Aluminium is 100% recyclable without a loss of quality
Long service life
Aluminium does not rust
Complete system
Extensive and coordinated system accessories, ensure safety and durability
Numerous design options
Very wide selection of standard colours as well as smooth and stucco surface, suitable for PREFA’s complete system
Environmentally friendly
Aluminium is 100% recyclable without a loss of quality
Long service life
Aluminium does not rust
Fold details
In the case of standing seam coverings, pre-profiled or folded panels are folded together to create a rainproof joint. The angled standing seam is primarily used for façades, while the double standing seam is used on roof surfaces. The following two images show the cross-sections of double and angled standing seams:
Installation systems and application types
PREFALZ strips, also known as panels, are produced on roll formers made of strip sheets.
These panels can be installed using sliding clips up to a length of 12m. If appropriate additional measures are taken, longer panels are also possible. The long sheets allow easy, safe and economical installation of the roof covering. The panel may always have the same width or may have different widths in special cases.
Mirror roofings and panel coverings consist of panels which are interrupted by transverse seams. They are often used in buildings with particularly high wind loads or are also used for design reasons.
Expert tip: for low pitched roofs with a roof pitch from 3°
Roofs designed with PREFALZ have the highest stability and durability. PREFALZ is suitable for very low pitched roofs* with a roof pitch from 3° and can also be installed well even at low temperatures.
* Observe country-specific standards and specialist guidelines.
Overview of PREFALZ colours
PREFALZ offers a wide range of standard colours, mainly in P.10 quality, with a 40-year colour guarantee. The paint coating is applied and fired in several processing stages in the coil-coating process. As a result, the coating layer is malleable and very weather-resistant.
Colour overview (19)
Colour |
Code |
~ RAL |
|
P.10 brown |
7013 |
|
P.10 anthracite |
7016 |
|
P.10 black |
9005 |
|
P.10 brick red |
8004 |
|
P.10 oxide red |
3009 |
|
P.10 moss green |
6005 |
|
P.10 light grey |
7005 |
|
P.10 zinc grey |
7030 |
|
P.10 prefa white |
9002 |
|
P.10 nut brown |
8019 |
|
P.10 pure white |
9010 |
|
P.10 dark grey |
7043 |
|
P.10 stone grey |
7031 |
|
metallic silver |
9006 |
|
plain aluminium |
|
|
black grey |
7022 |
|
bronze |
7048 |
|
P.10 patina green |
6027 |
|
patina grey |
7042 |
Notes
- The RAL values stated are merely approximate values (~), some of which may differ vastly from the original PREFA colour and, under certain circumstances, may not reflect the subjective perception of the colour.
- Above all for colour quality P.10, it is almost impossible to define values due to the surface structure.
- Plain aluminium: The guarantee does not cover surface appearance alterations caused by processing and environmental influences. Follow the instructions.
- Metallic colours may vary in shade.
- To identify exact colours for complementary components please consult original samples.
Be inspired by the roof projects already implemented with PREFALZ
The standing seam technique is the classic application type for metal roofs. With this technique, the building’s entire shell, i.e. roof and façade, can be clad to create an image as if from a single mould. The technique enables major creative freedom with uniform or varying panel widths as well as conical panels, in addition to the wide range of colours.
PREFALZ is also used for all details such as mantelpieces, wall coverings, verges and much more in PREFA small-format roofs.
We have summarised more Tips for choosing the right roof covering for you here. You will find even more inspiration in the Reference Gallery or Renovation Gallery.
Semi-detached houses with PREFALZ roof and façade in patina grey
Minimalist detached home with gable roof and PREFALZ in P.10 anthracite
Detached house with PREFALZ in P.10 PREFA white on roof and façade
The panels of different widths extend from the roof over the façade.
Gable roof without eaves with PREFALZ in P.10 zinc grey
Semi-detached houses with PREFALZ roof and façade in patina grey
Minimalist detached home with gable roof and PREFALZ in P.10 anthracite
Detached house with PREFALZ in P.10 PREFA white on roof and façade
The panels of different widths extend from the roof over the façade.
Gable roof without eaves with PREFALZ in P.10 zinc grey
Do you have any questions about the PREFALZ roof?
PREFA roof tiles, roof shingles, rhomboid roof tiles and FX.12 roof panels are an excellent choice for covering over older existing roofs thanks to their light weight. They can be quickly mounted to the existing roofing material, such as bitumen shingles or bituminous sheeting. This type of covering requires an intact sub-structure, correct roof pitch and other basic structural requirements!
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 tiles, shingle, roof panels, rhomboid 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.
What do I need to know about fire safety? PREFA roof and façade products (small format as well as Prefalz and sidings) are classified as non-combustible in accordance with EN 13501-1 with fire behaviour class “A1”. Fire behaviour class A1 means that products made from aluminium are not flammable. Find out more about fire safety here.
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.
PREFALZ technical information
Material |
coil-coated aluminium, 0.7 mm thick |
|---|---|
Standard dimensions |
PREFALZ for roofs: 0.7×500 mm; 0.7×650 mm |
Weight |
approx. 1.89 kg/m² |
Minimum roof pitch* |
3° (approx. 5%) * Observe country-specific standards and specialist guidelines. |
Supporting substrate and separation layer* |
on fully boarded substrate (at least 24 mm); separation layer as required * Observe country-specific standards and specialist guidelines. |
Fastening |
PREFA preformed fixed and long sliding clips (stainless steel) according to static requirements |
Caution: Mixing PREFALZ coils with colour-coated aluminium from competitive manufacturers, but also with FALZONAL® material of supposedly the same colour, should be avoided at all costs because of the different paint qualities and subsequent differences in weathering. Only in this way can you enjoy a harmonious-looking façade even after many years. This must also be observed for weatherings, cappings and the like.
Roof structure
PREFA aluminium roofs are produced with a ventilated substructure, with the roof cover and thermal insulation layer separated by a ventilated gap. This means any occasional condensation can be wicked away.
It is mostly the roof membrane that is ventilated, as shown in the first picture. However, the whole attic space can also be ventilated (second picture).
Separating layers
Separating layers arranged directly under the roof covering can fulfil a variety of tasks. Whether a separating layer is used or which separating layer is to be used should thus be already taken into account in the planning phase.
Separating layers can:
- protect the wooden formwork or wood-based panels from moisture during the construction phase.
- improve sound insulation (acoustic decoupling).
- compensate for minor unevenness in the roof structure.
- improve the extension and contraction of the trays.
- protect the metal on the underside against damaging alkaline influences and possible harmful chemicals in substrate.
- support the roof covering and the sub-roof with regard to the rainproof function.
Depending on the function that a separating layer is to assume, a suitable product must be agreed with the manufacturer of the separating layers. If, for example, the separating layer’s function is to provide additional sound insulation, the use of stronger, heavier bitumen separating layers (e.g. BauderTOP UDS 3 NK or similar) is recommended. If the separating layer is “only” intended to protect the substructure during the building phase, a thinner bitumen separating layer can be used (e.g. BauderTOP TS 40 NSK or similar).
Expert tip: PREFALZ 500 for mono-pitched roofs
Mono-pitched roofs with double standing seam coverings can cause noise due to strong winds. Here, we recommend using PREFALZ with 500 mm tray width and installing a bitumen separating layer. Adequate sound insulation measures must already be taken into account when planning the roof structure.
Tips for processing standing seams
The length of the fixed area is 1–3 metres depending on the panel length. Positioning of the fixed clips area must always be selected in relation to the existing roof pitch (see fig. and associated table) Penetrations or the roof shape may affect the position of the fixed clips area. Elevations with variable fixed clip areas must be separated by separating strips.
Roof pitch |
Position of the fixed clip area |
> 3°–5° (> 5–9 %) |
in the middle of the panel |
> 5°–10° (> 9–18 %) |
in the upper third of the panel |
> 10°–30° (> 18–58 %) |
in the upper quarter of the panel |
> 30° (> 58 %) |
at the top of the panel |
Planning & Application
Here, our installers and architects can download specification documents and details about PREFALZ. In the service area, you will find the info sheet about the mantelpiece with PREFALZ, installation guidelines for the walkway support for PREFALZ, installation instructions for Vario solar bracket with PREFALZ as well as PREFALZ installation videos. For more information on the installation, see the PREFALZ installation guidelines. The service area is only accessible for partner companies – please have your log-in details ready. Not received your log-in details yet? Please contact your Local Sales Manager in that case.
Special note for our architecture and design studios: 3D and BIM data, as well as textures for our products can also be found here: digital planning
Accessories for PREFALZ roofs
Clips with stainless steel nails, screws or rivets are to be used to fasten standing seam applications. In order to ensure a sufficient snow guard system, seam clamps including snow guard pipes and ice stoppers are used for standing seam coverings. These system accessories and others, such as the PREFA sealing gel, include PREFA’s complete system.
Stainless steel preformed fixed clip (screwed)
Not to be used on the façade in combination with the special screws for an aluminum and steel substructure!
Stainless steel preformed sliding clip (screwed)
Panel length of up to 12 m. Not to be used on the façade in combination with the special screws for an aluminum and steel substructure!
Stainless steel preformed long sliding clip (screwed)
Panel lengths of 12 m - 15 m. Not to be used on the façade in combination with the special screws for an aluminum and steel substructure!
Stainless steel preformed fixed clip (nailed)
-
Stainless steel preformed sliding clip (nailed)
for tray lengths of up to 12 m
Stainless steel preformed long sliding clip (nailed)
tray lengths 12 – 15 m
Stainless steel fish tailed fixed clip
-
Stainless steel fish tailed sliding clip
tray lengths up to 12 m
Sealing gel
in a cartridge or in a foil pouch
Single pipe seam clamp
for pipe openings with a diameter of 28 mm
Double pipe seam clamp
for pipe openings with a diameter of 28 mm
Seam clamp with oblong hole
for pipe openings with a diameter of 28 mm
Snow guard pipe
for seam clamps; 28 × 2 × 3.000 mm,
Corner connector 90°
for snow guard pipes ⌀ 28 × 2 mm
Ice stopper
for snow guard pipes 28 × 2 mm
Sunny solar bracket
suitable for all PREFA small format products and standing seam systems.
Vario Prefalz solar bracket
Suitable for PREFA double-lock standing seams with a seam height of 25 mm. Available with or without cross connectors. Only suitable for processing PREFA profile rails, and not compatible with other products.
Walkway support for standing seam roofs
roof pitch: 5°-55°
Walkway support for standing seam roofs
250 × 1.200 mm, 250 × 800 mm, 250 × 600 mm, tested according to DIN EN 516-1-A
Walkway connector
-
Roof anchor hook according to EN 517 – B SDH Industry 31
tested for securing 2 persons
Frog-mouth vent cover
for riveting, air intake section approx. 30 cm²
Vent pipe
Ø 100 mm, Ø 120 mm including EPDM seal and cover
Bonded vent pipe cover for standing seam roofs
roof pitch: 3°-52°
Roof hatch cover and wooden frame
roof pitch from 12°
Roof window flashing for Prefalz
available in many dimensions
Special adhesive kit
Content: 1 cartridge of PREFA special adhesive 290 ml, 1 can of adhesive cleaner 60 ml, 1 piece of sandpaper, 1 cloth, 2 adapter nozzles
