General Archives

Retrofitting Perimeter Protection in 2026: Outdoor Security with rotec APS

by Karl Marx, rotec Berlin | May 27, 2026 | General, Main contributions, Metalworking, Products, Security fences | 0 |

rotec APS provides retrofittable perimeter protection and professional open-area security for existing fences, walls, gates, access roads, solar parks, industrial sites, outdoor storage areas, and critical infrastructure. The system integrates fence monitoring, electric fencing, sensors, radar, video surveillance, alarm technology, and control center connectivity into a site-specific security solution. This allows existing property boundaries to be technically upgraded, security-related incidents to be detected earlier, and clear response protocols to be established. rotec supports operators from the initial site assessment through consulting, planning, and installation to maintenance, testing, repairs, and service contracts.

Retrofitting Fence Monitoring in 2026: rotec APS Flexiguard for Existing Fences

by Karl Marx, rotec Berlin | May 25, 2026 | General, Railroad projects, Home, Products, Security fences | 0 |

Retrofitting fence monitoring systems is becoming increasingly important for operators of commercial properties, industrial sites, airports, and critical infrastructure. rotec APS Flexiguard transforms existing fences into an active security perimeter. The system detects mechanical attacks on the fence, effectively supplements existing barbed wire, and can forward alerts to camera surveillance, security personnel, or a control center. This transforms a passive fence system into an active solution for modern perimeter security.

Planning Renson acoustic louvres correctly (2026)

by Karl Marx, rotec Berlin | May 18, 2026 | General, Louvre facades, Air technology, Ventilation grille, Metalworking, Products | 0 |

Renson acoustic louvres provide a technical solution for facades, plant rooms, rooftop structures and enclosures, data centres, industrial buildings and car parks where airflow, screening, weather protection and sound insulation must be planned together. This technical article compares the Renson Linius acoustic louvres L.060AC, L.150ACS, L.150ACL, L.170ACS and L.170ACL. It explains sound insulation values, free area, K-factors, applications, installation guidance and common planning mistakes. It also describes how rotec supports technical coordination, advice, supply and installation. The article is intended for architects, design practices, building services engineers, facade contractors, metal fabricators, industrial businesses and building owners looking for a suitable louvre solution for technical building openings.

Renson ventilation grille 411: Planning, specifying and configuring rotec W11 online (2026)

by Karl Marx, rotec Berlin | April 29, 2026 | General, Louvre facades, Air technology, Ventilation grille, Products | 0 |

The Renson 411 ventilation grille corresponds to the rotec W11 ventilation grille. This article covers technical data, installation frames, free area, weather protection, installation, specification text, CAD downloads and the rotec online configurator. It also explains how rotec supports architects, designers, metal fabricators and industrial businesses with ventilation grilles, roof hoods and technical building openings.

Renson ventilation grille configurator 2026: How rotec W11, W12 and other types correspond to Renson models

by Karl Marx, rotec Berlin | April 10, 2026 | General, Main contributions, Louvre facades, Air technology, Ventilation grille, Metalworking, Products | 0 |

The rotec Renson ventilation grille configurator makes it easier to identify the corresponding grille types in the new shop. This article explains why rotec W11 corresponds to Renson type 411, how the W-series naming system works, and what designers, metal fabricators and technical buyers should consider when selecting ventilation grilles and weather louvres. It also shows how established Renson louvre profiles can be combined with custom manufacturing in Berlin, direct configuration and personal technical advice.

Custom-Made Stainless Steel Mirror Sheets: How to Properly Plan for Mirror Sheets Instead of Glass Mirrors

by Karl Marx, rotec Berlin | March 30, 2026 | General, Home, Metalworking, Products | 0 |

Custom-made mirror-polished stainless steel sheets from rotec are the ideal solution when projects require a high-quality mirror finish, yet safety, durability, and precise workmanship are also top priorities. Whether in commercial construction, interior design, public buildings, elevator cabs, or sophisticated design applications: Mirror-polished stainless steel sheets combine an elegant appearance with high durability and great design flexibility. rotec manufactures custom-fit solutions in Berlin and offers a technically sophisticated, comprehensive package—from material selection to fabrication.

To ensure that a stainless steel mirror not only looks great but also remains functional over the long term, the material thickness, dimensions, substrate, finish, and installation must all be carefully coordinated. That is precisely why this article explains what really matters when it comes to custom-made stainless steel mirror sheets, what technical advantages the material offers, what typical applications are, and how planning errors can be avoided from the very beginning.

Expanded metal facades (2026): Planning, installation, costs and practical guidance from rotec

by Karl Marx, rotec Berlin | Feb. 5, 2026 | General, Main contributions, Louvre facades, Metalworking, Products, Security fences, Expanded metal - Expanded metal | 0 |

In modern architecture, façade systems play a decisive role, not only for the aesthetics of a building, but also for its functionality and sustainability. One innovative solution that has become increasingly popular in recent years is the use of expanded metal for façades and climate enclosures on the roof. This technique offers a variety of benefits, from improving energy efficiency to creating unique visual effects. One company leading the way in this field is rotec Berlin, with 35 years of experience in the metalworking industry.

Razor wire (2026): Extended length, installation and practical specification guidance

by Karl Marx, rotec Berlin | Jan. 7, 2026 | General, Railroad projects, Main contributions, Home, Metalworking, Products, Security fences | 2 |

This article provides a practical guide to NATO wire for use in industry, correctional facilities, and security projects. You’ll find clear guidelines on extension length, 52 coils, and coil spacing, as well as installation instructions for fence caps, Y-beams, and existing fences. In addition, the text includes calculation examples, common mistakes, and a checklist for bidding and acceptance.

Acoustic louvres on a high-rise building in Berlin City West | rotec

by Karl Marx, rotec Berlin | Dec. 18, 2025 | General, Louvre facades, Air technology, Ventilation grille, Products | 0 |

Project report from Berlin City West: rotec manufactured and installed acoustic louvres for the rooftop equipment of a high-rise building on Budapester Straße. Includes original photographs, Renson data and planning guidance.

High-Security Fence (2026) Security fencing and open-area security solutions for industry, with planning and installation services throughout Europe provided by rotec

by Karl Marx, rotec Berlin | Dec. 13, 2025 | General, Railroad projects, Metalworking, Products, Security fences | 0 |

For many industrial facilities, a high-security fence is a key component of outdoor security. This is because valuable materials are often stored outdoors, and at the same time, sites are frequently unmanned at night. This increases the risk, which is why perimeter protection is needed that both deters intruders and triggers an alarm. This is precisely where security fencing and high-security fencing complement each other when viewed as a single system.

Custom Perforated Sheet Metal 2026: DIN 24041, Cutting and Sheet Metal Fabrication

by Karl Marx, rotec Berlin | Oct. 11, 2025 | General, Perforated plates, Metalworking, Products | 0 |

Custom Perforated Sheets Explained Simply: rotec shows what architects, designers, metal fabricators, and industrial customers should look for in perforated sheets. This article explains types of perforations—such as round, square, slotted, and custom perforations—key DIN standards like DIN 24041, the calculation of open area, materials such as steel, stainless steel, and aluminum, as well as typical applications for facades, ventilation, acoustics, mechanical engineering, storefitting, and industry. It also covers cutting to size, laser cutting, edge finishing, welding, assembly production, hot-dip galvanizing, visible surfaces, deburring, edging profiles, safety gratings, and common design mistakes.

Laser Cutting in Berlin: Custom Laser-Cut Parts from rotec

by Karl Marx, rotec Berlin | Oct. 11, 2025 | General, Main contributions, Home, Perforated plates, Metalworking, Products | 0 |

Laser-cut parts made of steel, stainless steel, and aluminum at rotec in Berlin. Find out what CAD data, tolerances, and specifications for further processing are needed to receive a customized quote.

Welded mesh – large selection of PS mesh available immediately from stock in the rotec Profishop

by Karl Marx, rotec Berlin | Aug. 15, 2025 | General, Railroad projects, Metalworking | 0 |

Welded mesh is indispensable in construction, industry, agriculture, architecture, and landscaping. It offers high stability, a long service life, and a wide range of applications. At rotec Profishop, you’ll find one of the largest selections of welded mesh in Germany—available immediately from stock and in numerous variations.

Effectively Prevent Cable Theft in Solar Parks (2026) with the rotec APS Electric Fence and 9,000-Volt Touch Protection

by Karl Marx, rotec Berlin | Feb 11, 2025 | General, Metalworking, Products, Security fences | 0 |

Effectively preventing cable theft at solar parks will be a must for operators and investors in 2026. That’s because thieves steal copper and, at the same time, cause downtime. In addition, follow-up costs rise because inspections and repairs take time. That’s why security must be part of operational planning—just as much as maintenance and monitoring. rotec supports solar parks in this effort with active perimeter protection and clear alarm systems.

GRP gratings in the railroad sector

by Karl Marx, rotec Berlin | Nov 29, 2024 | General, Railroad projects, Gratings, Main contributions, Metalworking, Products, Security fences | 0 |

GRP gratings are the perfect choice for modern railroad infrastructure. With outstanding properties such as corrosion resistance, electrical insulation and high load-bearing capacity, they are ideal for manhole covers, safety fences, maintenance walkways and train washing systems. Thanks to EBA approval and manufacturer-related product qualification (HPQ) in accordance with DBS 918020, they meet the highest safety and quality standards. Durable, maintenance-free and versatile, GRP gratings offer an economical and sustainable solution that increases the efficiency and safety of your projects. Perfect for purchasers and construction companies.

Perforated sheets available immediately: over 1,000 varieties, cut to size at rotec

by Karl Marx, rotec Berlin | Nov 6, 2024 | General, Perforated plates, Metalworking, Products | 0 |

Perforated sheets available immediately: rotec keeps over 1,000 types of perforated sheets in stock in Berlin and also supports customers with cutting to size, laser cutting, edge finishing, bending, and technical consulting. This article is intended for architects, designers, metal fabricators, facade contractors, industrial companies, and shopfitters who want to purchase perforated sheets quickly, plan reliably, or have them custom-processed.

Renson louvre walls: Manufacturing, installation and projects by rotec

by Karl Marx, rotec Berlin | Oct 11, 2024 | General, Home, Louvre facades, Linarte, Air technology, Ventilation grille, Products | 0 |

For 30 years, rotec in Berlin has been offering comprehensive solutions for the installation and manufacture of Renson slat walls. Particularly noteworthy is our comprehensive service package for: Louvre walls, aluminum facades, parking garages, roof enclosures, air conditioning enclosures, weather protection grilles, Linarte wall claddings

From planning, measurement and production to optional installation throughout Europe - we offer you everything from a single source.

Self-luminous and translucent GRP gratings for creative design

by Karl Marx, rotec Berlin | Oct 10, 2024 | General, Gratings, Home, Louvre facades, Air technology, Products | 0 |

In modern architecture and design, materials that combine functionality and aesthetics are becoming increasingly important. Self-luminous and translucent GRP gratings (glass fiber reinforced plastic) offer precisely these properties and open up a wide range of design options for architects, planning offices, façade builders and designers. The innovative gratings from MM combine the interplay of light and shadow to create unique visual effects. They are being used more and more frequently, especially in the design of façades, stairs and terraces.

Entrance Mats with Tactile Guidance Systems: Consultation, Measurement, and Installation

by Karl Marx, rotec Berlin | Sep 30, 2024 | General, Gratings, Home, Metalworking, Products | 0 |

A tactile entrance mat combines dirt-trapping with wayfinding. rotec supports you with consulting, its own specialists for measurement and installation, and a nationwide on-site measurement service (for a fee).

3200 sqm rotec aluminum gratings for ceiling suspensions: A highlight at Stuttgart 21

by Karl Marx, rotec Berlin | Sep 24, 2024 | General, Railroad projects, Gratings, Main contributions, Home, Louvre facades, Metalworking, Products | 0 |

The major Stuttgart 21 project is one of the largest transportation infrastructure measures in Germany. In addition to the redesign and conversion of Stuttgart Central Station, it also includes the construction of several underground stations, including the underground station at Stuttgart Central Station and Stuttgart Mitte Station. As part of this project, rotec GmbH Berlin supplied a total of 3,200 m² of aluminum grating for the ceiling suspensions, which were specially adapted to the high requirements of Deutsche Bahn.

Type O2 safety gratings: maximum slip resistance for industrial stairs, ramps and bridge decks

by Karl Marx, rotec Berlin | Sep 4, 2024 | General, Railroad projects, Gratings, Home, Metalworking, Products | 0 |

Type O2 safety gratings: maximum safety and versatility for industrial applications
Type O2 safety gratings from rotec are the perfect construction elements for demanding industrial and construction environments where slip resistance and stability are of crucial importance. With their first-class R13 slip resistance, they guarantee maximum safety even under extreme conditions.

Stainless steel pigeon spikes from rotec, durable pigeon protection compared to plastic spikes

by Karl Marx, rotec Berlin | Sep 2, 2024 | General, Railroad projects, Home, Metalworking, Products | 0 |

Stainless steel pigeon spikes from rotec are the ideal solution for keeping pigeons away from buildings and ensuring animal welfare at the same time. Pigeons are a widespread problem in urban areas. Their settling on buildings not only leads to unsightly soiling, but also poses a considerable health risk. In this article, we would like to explain the advantages of stainless steel pigeon spikes and compare them with the plastic alternatives. We also shed light on the health risks posed by pigeon droppings and why reliable pigeon repellent is essential.

Sand plates made of aluminum and steel

by Karl Marx, rotec Berlin | Aug 13, 2024 | General, Gratings, Metalworking, Products | 0 |

Aluminum or hot-dip galvanized steel? Compare materials, standard dimensions, and selection criteria. All rotec sand sheets are available individually.

Razor wire training rolls: Safe training and effective deterrence for military and police training

by Karl Marx, rotec Berlin | Jul 20, 2024 | General, Main contributions, Metalworking, Products, Security fences | 0 |

In military and police training facilities, the safety of trainees is a top priority. Conventional NATO wire (also known as razor wire) with razor-sharp blades poses a considerable risk of injury, particularly during handling and training. To minimize this risk and still offer realistic training conditions, rotec presents the innovative solution: reusable razor wire training reels without blades.

Checker plate steps with CE marking: DIN EN 1090 and manufactured by rotec

by Karl Marx, rotec Berlin | Jul 17, 2024 | General, Gratings, Metalworking, Products | 0 |

CE-marked checker plate steps from rotec: Learn when DIN EN 1090 applies, what EXC1 and EXC2 mean, and what information is required for planning, design, and manufacturing.

Double wire mesh industrial fencing, you should pay attention to this when buying your fence!

by Karl Marx, rotec Berlin | Jun 28, 2024 | General, Home, Metalworking, Products, Security fences | 0 |

The popularity of double wire mesh as a fencing system in Europe is undisputed. This popularity results from the robust construction, the fact that they are largely maintenance-free and their high cost-effectiveness. Despite a higher initial investment compared to wire mesh fences, the investment pays off in the long term. Traditionally, the double wire mesh has been manufactured over four decades with a mesh size of 50×200 mm, two cross wires made of 8 mm round steel and a vertical bar made of 6 mm round steel. After production, the mats are hot-dip galvanized in a full bath, making them particularly robust and durable - a hallmark of rotec quality.

Parking garage louvre façade: Renson Linius L.050 louvre blade & perforated metal panels

by Karl Marx, rotec Berlin | Apr 4, 2024 | General, Home, Louvre facades, Ventilation grille, Products | 0 |

In the vibrant heart of Rotterdam, a metropolis recognized worldwide for its pioneering architecture and progressive approach to urban development, rises the "Uptown Rotterdam" parking garage project. This flagship project is an impressive illustration of how the symbiosis of modern technology and aesthetic design can shape the future of urban infrastructure. Through the clever integration of Renson brand louvers together with first-class perforated metal panels, this building sets new standards in the design of parking garages.

Aluminum floor grilles: Efficient ventilation in server rooms

by Karl Marx, rotec Berlin | Mar 24, 2024 | General, Gratings, Home, Air technology, Ventilation grille, Products | 0 |

A focus on application flexibilityIn the world of technology, where server rooms are at the heart of our digital infrastructure, efficient and reliable cooling is essential. This is where aluminum floor grilles play a crucial role. The AV500 model from Grada is a prime example of high-quality solutions that meet both technical and aesthetic requirements.

Electric Fence for Critical Infrastructure 2026: Perimeter Protection with rotec APS

by Karl Marx, rotec Berlin | Mar 14, 2024 | General, Railroad projects, Home, Metalworking, Products, Security fences | 1 |

rotec APS electric fencing protects critical infrastructure, power plants, substations, solar farms, data centers, municipal utilities, and sensitive industrial sites through visible deterrence, technical detection, and alarm transmission. rotec supports operators with consulting, asset assessments, system selection, installation, maintenance, testing, repairs, and service contracts. This results in site-specific perimeter protection that effectively integrates existing fencing systems, gates, access roads, camera surveillance, alarm technology, and connection to control centers.

Night setback in data centers: security and efficiency with Renson 431RC2 burglar-resistant ventilation grilles

by Karl Marx, rotec Berlin | Mar 1, 2024 | General, Home, Louvre facades, Air technology, Ventilation grille, Products | 0 |

Lowering the temperature in data centers at night is an advanced method of reducing operating costs and significantly improving energy efficiency. In conjunction with burglar-resistant ventilation grilles such as the type 431RC2, certified to DIN EN 1627, this opens up an innovative way of ensuring security and efficiency in equal measure. .....

Stainless Steel Mirrors in the Riding Arena: Properly Planning Installation, Substrate, and Reflective Effect

by Karl Marx, rotec Berlin | Feb 5, 2024 | General, Metalworking, Products | 1 |

Stainless steel mirrors in indoor riding arenas are a safe and durable solution when a clear mirror effect is required but glass is not the best choice for safety reasons. In equestrian sports in particular, mirrors must withstand heavy loads while also enabling reliable visual monitoring. Using a real-world example, rotec demonstrates why, when it comes to mirror-polished stainless steel sheets, it is not only the material but, above all, the substrate, format, and installation that determine the final result.

Innovation in tear plate and checker plate processing

by Karl Marx, rotec Berlin | Jan 29, 2024 | General, Gratings, Metalworking, Products | 0 |

Today I'm taking you on a little journey through time in our blog. I recently watched one of our old YouTube films showing the processing of tear plates at rotec. It was amusing to watch this movie, which I had made myself a decade ago - with a dramatically exaggerated soundtrack that I'm sure no one would choose today. At the time, my YouTube video creation skills were still in their infancy, making this movie one of my first projects in this area.

LINARTE privacy fence with LED lighting

by Karl Marx, rotec Berlin | Jan 23, 2024 | General, Louvre facades, Linarte, Ventilation grille, Products, Security fences | 0 |

Linarte privacy screen Elegance meets functionality: The LINARTE privacy fence from Renson - Exclusively at rotec Berlin Welcome to our blog! Today I would like to introduce you to something very special: the LINARTE privacy fence with LED lighting from Renson. As the exclusive contractual partner of Renson in Germany, rotec Berlin offers you these extraordinary fences that perfectly combine design and privacy. A masterpiece of aesthetics The LINARTE series is more than just a privacy fence. It is a statement from Renson for high-quality wall cladding and slatted walls. With its clear, linear aesthetics, the...

Metal cellar partitions: Available immediately from stock in Berlin

by Karl Marx, rotec Berlin | Nov 2, 2023 | General, Home, Metalworking, Products, Security fences | 4 |

Metal basement partition walls available immediately from our Berlin warehouse: rotec keeps large quantities of mesh panels and doors in stock and handles installation nationwide. Learn what matters when it comes to layout, materials, and installation.

rotec Klima enclosure louvre wall in Frankfurt with impressive panorama

by Karl Marx, rotec Berlin | Oct 19, 2023 | General, Main contributions, Louvre facades, Ventilation grille, Metalworking, Products | 0 |

At the heart of the impressive skyline of Frankfurt am Main stands an impressive testimony to technical expertise and design innovation: a louvre wall façade, designed, planned and installed by rotec, fitted with louvres from our long-standing premium partner Renson.

For 35 years, rotec has been shaping the slatwall industry, bringing unmatched experience and expertise to the table. Our continuous commitment to the highest quality has made us a leading player in the field. Every project we complete reflects our firmly held values of consistency, precision and excellence.

rotec sheet metal cutting and sheet metal processing in Berlin - your specialist for precision

by Karl Marx, rotec Berlin | Oct 6, 2023 | General, Gratings, Home, Perforated plates, Metalworking, Products | 0 |

Sheet metal cutting and sheet metal processing in Berlin - your expert for customized solutions
Sheet metal cutting and sheet metal processing in Berlin play a central role in many industries. At rotec, we offer precise and fast sheet metal cutting and comprehensive sheet metal processing for a wide range of applications. Whether one-off production or large series, our experienced team and modern machines ensure that your metal projects are implemented precisely and on time. With a large stock of materials and advanced technologies, we are your reliable partner for sheet metal processing in Berlin.

35 years of rotec GmbH: A milestone in industrial metal processing

by Karl Marx, rotec Berlin | Oct 2, 2023 | General, Metalworking, Products | 0 |

For 35 years now, the name rotec has stood for quality, reliability and innovation in the metalworking industry. Our journey began in 1988, when we set ourselves the goal of developing not only metal products, but solutions for our customers

Night ventilation for buildings: Natural cooling and energy savings

by Karl Marx, rotec Berlin | Sep 21, 2023 | General, Louvre facades, Air technology, Ventilation grille, Products | 1 |

Night ventilation uses cool outdoor air to reduce heat in buildings during summer. Discover how rotec creates secure ventilation openings with protection against weather, insects and break-ins.

Long throw nozzles from Grada ensure optimum air flow

by Karl Marx, rotec Berlin | Aug 31, 2023 | General, Louvre facades, Air technology, Ventilation grille, Products | 0 |

The comfort and quality of indoor air in public facilities are more than just a luxury; they are in fact a decisive factor for people's health and well-being. In large premises such as shopping malls and sports halls, the requirements for air conditioning are particularly high. In this blog article, we want to put the spotlight on the innovative jet nozzles from the Belgian company Grada, which offer significant advantages in these application areas.

Aluminum lamella facade in Potsdam

by Karl Marx, rotec Berlin | Aug 28, 2023 | General, Home, Louvre facades, Ventilation grille, Products | 0 |

Façades are the face of a building and tell a lot about its function and aesthetics. In modern architectural developments, great importance is attached to sustainable, aesthetically pleasing and functional façade solutions. Louvre façades made of aluminum are particularly popular, as they can be used both as privacy screens and to control the flow of light and air.
In this blog article, we at rotec, as a 25-year premium partner of the Belgian company Renson, would like to introduce you to the high-quality aluminum façades with Renson L.050 HF slats that were installed at the swimming pool at Stern in Potsdam.

Acoustic louvre wall in Berlin: Planning enclosures for air-conditioning equipment

by Karl Marx, rotec Berlin | Aug 25, 2023 | General, Louvre facades, Ventilation grille, Products | 0 |

An acoustic louvre wall in Berlin for air-conditioning and rooftop equipment: This technical article covers planning, airflow, acoustic requirements, and manufacturing and installation by rotec.

Shaft smoke extraction for elevators

by Karl Marx, rotec Berlin | Aug 17, 2023 | General, Louvre facades, Air technology, Ventilation grille, Products | 0 |

The rotec roof hatch RW3000 was developed in 2018 especially for shaft smoke extraction for elevators on flat roofs. The motor of the closable roof hatch can be controlled by any on-site SHEV system or manually, allowing flexible control.

Category: General

Newest Posts

Newest Comments

Menu