Roof system Prefalz®

Versatile and flexible: Prefalz® offers planners plenty of scope for creativity and is easy to work with.

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Thanks to it’s properties Prefalz is more pliable than most comparable hard metals. Architects can use it in many creative ways as roof and wall applications. PREFA recommends a minimum roof pitch of >7° but in accordance with national guidelines a roof pitch of >3° is feasible (see PREFA Installation Instructions).

Prefalz Falzdach in P.10 Zinkgrau mit Dachflächenfenstern

Advantages

  • Comprehensive PREFA system accessories
  • Versatile use – from arched roofs to complex roof extensions, domes or large-scale roofs
  • Colour chart with 19 standard colours
  • Available with smooth or stucco surface
  • Low weight sheet strip: 1.89 kg/m²: approx. 2.3 kg/m² roof surface with Prefalz® 500, approx. 2.2 kg/m² roof surface with Prefalz® 650
  • Long service life – non-corrosive!
  • Fully recyclable
  • Also available with protective film on request (smooth surface only)
  • Easy to work with even in low outdoor temperatures
  • Easy to work with, strong load-bearing capacity
  • Alloy, mechanical properties and coating are coordinated with the folding technology
  • No heavy metal erosion
  • Prefalz® is non-combustible (A1)

Colour overview (19)

The product is available in the following colours

Colour

Code

~ RAL

01 Braun

P.10 brown

7013

02 Anthrazit

P.10 anthracite

7016

03 Schwarz

P.10 black

9005

04 Ziegelrot

P.10 brick red

8004

05 Oxydrot

P.10 oxide red

3009

06 Moosgrün

P.10 moss green

6005

07 Hellgrau

P.10 light grey

7005

08 Zinkgrau

P.10 zinc grey

7030

10 Prefaweiß

P.10 prefa white

9002

11 Nussbraun

P.10 nut brown

8019

17 Reinweiß

P.10 pure white

9010

PREFA dunkelgrau ähnlich DB 703 oder RAL 7043

P.10 dark grey

7043

43 Steingrau

P.10 stone grey

7031

12 Silbermetallic

metallic silver

9006

13 naturblank

plain aluminium

23 Schwarzgrau

black grey

7022

45 Bronze

bronze

7048

46 Patina grün

P.10 patina green

6027

47 Patina grau

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.

Technical information

Prefalz® coils are perfect for use in standing seam roofing and cladding. Prefalz®  strips are also ideal for use as flashing strips on PREFA small format components – suitable for various connections and flashings with dimensions of 0.70 × 1,000 mm (60 kg rolls).

  • Available in 19 colours
  • Our service: Profiling and rounding at our factory or directly on site

Tip: Strong winds blowing against mono-pitched roofs with double-lock standing seams can get noisy. To tackle this problem, we recommend using Prefalz® with a strip width of 500 mm. Sufficient sound insulation measures should already be taken into account when planning the roof structure.

Caution: Combining Prefalz® strips with other colour aluminium strips should be avoided at all costs due to the different paint qualities and folding abilities.

Material

coil-coated aluminium, 0.7 mm thick

Standard dimensions

PREFALZ for roofs: 0.7×500 mm; 0.7×650 mm
complementary coil: 0.7×1,000 mm

Weight

approx. 1.89 kg/m²
actual consumption with PREFALZ 500: approx. 2.3 kg/m²
actual consumption with PREFALZ 650: approx. 2.2 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

Tips for installation

Roof pitch

position of fixed point area*

> 3°–5° (> 5 %–9 %)

in the tray centre

> 5°–10° (> 9 %–18 %)

in the top third of the tray

> 10°–30° (> 18 %–58 %)

in the top quarter of the tray

> 30° (> 58 %)

at the top end of the tray

Planning and installation

Accessories

Niro Winkelstehfalzhaft von PREFA

PREFA stainless steel preformed fixed clip

Niro Winkelschiebehaft von PREFA

PREFA stainless steel preformed sliding clip

PREFA stainless steel preformed long sliding clip

tray length 12 m – 15 m

PREFA stainless steel fish tailed fixed clip

PREFA stainless steel fish tailed sliding clip

PREFA sealing gel

PREFA one-pipe seam clamp

for pipe openings with a diameter of 28 mm

PREFA seam clamp with oblong hole for diagonal seams

for pipe openings with a diameter of 28 mm

PREFA two-pipe seam clamp

for pipe openings with a diameter of 28 mm

PREFA pipes

28 × 2 × 3,000 mm, for seam clamps, including connection sleeve

PREFA corner connector 90°

for PREFA pipe 28 × 2 mm

PREFA ice stopper

for PREFA pipe 28 × 2 mm

PREFA walkway

250 × 1,200 mm, 250 × 800 mm, 250 × 600 mm, according to DIN EN 516-1-A

PREFA walkway supports for standing seam roofs

roof pitch: 5°–55°

PREFA connector for walkways

PREFA roof anchor hook according to EN 517 B SDH-Industry 31

tested for securing 2 persons

PREFA roof hatch cover and wooden frame

from roof pitches of 12°

PREFA adhesive flashing strip for standing seam roofs

roof pitch: 3°–52°

PREFA vent pipe

⌀ 100 mm, ⌀ 120 mm

PREFA frog-mouth vent cover

air intake section: approx. 30 cm²

PREFA special adhesive kit

Content: 1 × 290 ml cartridge of PREFA special adhesive, 1 × 60 ml can of adhesive cleaner, 1 piece of sandpaper, 1 cloth and 2 adapter nozzles

PREFA bird screen

125 × 2,000 × 0.7 mm; round perforations (⌀ 5 mm)

PREFA ventilation screen

square perforations (6 mm); colours brown/anthracite and light grey/light grey; dimensions: 1.00 × 250 mm and 1.00 × 333 mm