Close-up of a house with PREFA’s on-roof gutter in anthracite

On-roof gutter

The PREFA on-roof gutter is a durable and robust roof drainage system with easy installation and various colour variations, which is suitable for many types of roofs.

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In contrast to the half-round gutter and box gutter, the PREFA aluminium on-roof gutter is mounted on the roof surface by means of its own on-roof gutter brackets.

Buildings with many details, towers and angled roof surfaces; the roof is covered with PREFA’s roof tile in anthracite. The PREFA half-round gutter and the PREFA on-roof gutter in anthracite are used for roof drainage.

When is PREFA’s on-roof gutter used?

PREFA’s on-roof gutter is used, for example, in buildings on property boundaries. As a result, a few centimeters can be saved on the eaves (drip edge on the roof, lower edge of the roof), and the roof drainage does not protrude onto the neighbouring property. The on-roof gutter is also used for visual reasons in listed buildings, as the roof drainage cannot be seen from below due to the gutter.

Advantages of PREFA’s on-roof gutter

Resistant

Made of coil-coated aluminum strips using the coil coating process, which means that the coating layer remains malleable.

Rust-free

Aluminium does not rust.
Also free of harmful heavy metal ions.

High-quality P.10 finish

Malleable coating layer that does not peel off. This eliminates the hassle of repainting or touching up.

Resistant

Made of coil-coated aluminum strips using the coil coating process, which means that the coating layer remains malleable.

Rust-free

Aluminium does not rust.
Also free of harmful heavy metal ions.

High-quality P.10 finish

Malleable coating layer that does not peel off. This eliminates the hassle of repainting or touching up.

40-year guarantee

Resistant to continuous temperatures

from -30°C to +80°C

Complete system

PREFA provides you with all accessories from one source.

40-year guarantee

Resistant to continuous temperatures

from -30°C to +80°C

Complete system

PREFA provides you with all accessories from one source.

Good for the environment

The PREFA aluminium drainage system is the best choice from an ecological point of view too. This is because aluminium does not release harmful heavy metal ions into the sewage water when gutters and pipes are constantly flushed out with rainwater, as is the case with conventional materials.

Colour range of PREFA’s on-roof gutter

PREFA’s on-roof gutter is available in the classic standard colours. The roof drainage system is part of PREFA’s complete aluminium system and is thus a perfect match for PREFA roof and façade systems, both visually and functionally.

Colour overview (12)

Colour

Code

~ RAL

01 Braun

P.10 brown

7013

02 Anthrazit

P.10 anthracite

7016

03 Schwarz

P.10 black

9005

07 Hellgrau

P.10 light grey

7005

10 Prefaweiß

P.10 prefa white

9002

11 Nussbraun

P.10 nut brown

8019

PREFA dunkelgrau ähnlich DB 703 oder RAL 7043

P.10 dark grey

7043

04 Ziegelrot

brick red

8004

05 Oxydrot

oxide red

3009

06 Moosgrün

moss green

6005

08 Zinkgrau

zinc grey

7030

13 naturblank

plain aluminium

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 projects that have already been implemented with PREFA’s on-roof gutter.

Here, we have compiled some reference buildings with PREFA’s on-roof gutter for inspiration.

Do you have any other questions about PREFA’s on-roof gutter?

  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.

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.

Aluminium materials are largely corrosion-resistant.

Technical information

The coating layer is malleable and resistant to general chemicals and weather conditions. Coil coating production is accompanied by strict quality controls.

Temperature-resistant

from -30°C to +80°C

On-roof gutter dimensions (piece lengths 3 m and 6 m)

700 x 1.0 mm

Aluminum water downpipes (piece length 3 m)

Ø 80 mm, Ø 100 mm, Ø 120 mm, Ø 150 mm

Planning and use

Metalworkers and architects can download Tender specifications for PREFA’s on-roof gutter here.

Accessories

The system accessories of PREFA’s on-roof gutter are matched to the standard colours of the PREFA roof and façade system. This means that you receive 100% original accessories in tried-and-tested PREFA quality.

For a complete, detailed list of accessory products, see our price list (only for processors).

On-roof gutter bracket

28 × 7 mm

On-roof gutter end cap

-

On-roof gutter outlet

Ø 100

On-roof gutter expansion joint

6.000 × 375 mm