Browse the page as: Customer
MENU
Listwa J - NIAGARA Kwadratowa

NIAGARA Square - J-bar

Accessories. List J (so named because of its J-shaped design) is used in the assembly of NIAGARA Square gutters, as well as with other roof coverings and metal soffits. Made of galvanized sheet metal with a protective coating.

J-bar

NIAGARA Square – J-bar

NIAGARA Square – J-bar

The contemporary design of the gutter system perfectly complements modernist buildings.

The J-bar makes it easy to slide the soffit panel into place. This contributes to an aesthetically pleasing finish of the eaves; thanks to the materials from which it is made, it is exceptionally durable, as it is constructed from high-quality sheet metal coated with a technologically advanced protective coating.

The metal gutter system offered by our company is a complete gutter system. It was designed with aesthetics, functionality, and—above all—durability in mind. Our technology has allowed us to create products that impress not only with their excellent technical specifications but also with their visual appeal. The quality of our products is QUALITY SQUARED.

NOTE: List J is an accessory component used in the NIAGARA square gutter system, as well as in the assembly of soffits or roof coverings such as trapezoidal sheets. It is exactly the same component, with an identical cross-section, which can be used in both applications. The name derives from the characteristic shape of the cross-section, as shown in the technical scheme. It is manufactured from galvanized sheet metal and coated with a protective finish.

System configurations

Types of Systems

Types of Systems

The versatility of NIAGARA steel gutters means they are available in a wide range of configurations, tailored to different types of buildings.

The choice of system depends on the type of building and the roof area. Depending on the roof area, dual-pipe systems can be used to optimize water drainage efficiency.

Single-Family Housing

  • 125/80 System

  • 125/110 System
  • Systemy 150-190/120-150

    Budownictwo przemysłowe

    Available colors

    RAL 7016
    RAL 7016
    RAL 9005
    RAL 9005

    The Pruszyński Company guarantees that each individual order will be produced in the same color (shade). However, due to the complexity of the coating processes, slight variations in shade may occur between individual shipments; therefore, our responsibility for color consistency is limited to a single shipment. When reordering sheets from a specific batch, please indicate on the order form or inform your sales representative that this is a continuation of a previous order and provide a color sample. To ensure color consistency between tailored roof tiles and other elements, such as flashings, please order them from a single supplier.

    Technical specification

    Technical Specifications and Cross-Section

    Niagara System Square Mounting Component. The J-bar allows for easy insertion of the soffit panel. This contributes to an aesthetically pleasing finish of the eave. Thanks to the materials from which it is made, it is exceptionally durable. Our strips are durable and blend seamlessly with the rest of the drainage system components.

    Material
    Low-carbon steel S235/S275 JR+AR 25x4 mm and 25x5 mm
    Coating
    PURLAK (polyurethane), glossy, 50 μm thick
    Corrosion Resistance
    Complies with PN-EN 1462:2006, Part 5
    Load capacity
    H, in accordance with Section 6.2 of PN-EN 1462:2006
    Length
    2 m
    Niagara kwadratowa - System odwadniania NIAGARA Stalowe

    Availability and Sizes

    The NIAGARA gutter system, thanks to its wide range of sizes and dedicated components, allows for extensive customization to meet the needs of any project. To view the full product range and availability, please refer to the list below:

    NIAGARA SQUARE AVAILABILITY AND SIZE TABLE

    Material

    The system components are manufactured from the highest-quality steel, galvanized and coated on both sides with polyurethane (50 μm). Thanks to the use of these materials, we can be sure of color stability as well as high resistance to weather conditions. Polyurethane is characterized by very high resistance to corrosion as well as color fading.

    Niagara System Components: SQUARE

    Niagara Square - NIAGARA Steel Drainage System

    Niagara Square – NIAGARA Drainage System

    Recommendations

    Transport and Storage

    Gutters, pipes, and other system components must be transported in clean, dry, and covered vehicles. They must not get wet during transport and storage, as contact with water can trigger the initial stage of the patination process, characterized by the formation of a white film on the surface of the material.

    • Short-term storage: On the construction site, gutters, pipes, and other system components should be stored on pallets in their original packaging, under a roof. It is essential to protect the components from getting wet until they are installed.
    • Long-term storage: Rooms used to store components made of galvanized sheet metal should be dry and well-ventilated, and the temperature inside them must not fall below 0°C. Stored materials must be protected from moisture and kept separate from active chemicals.

    Inspiration

    Multi-storySingle-family home

    Single-family home in Ostrava

    PD-510 Standing Seam Roof Panels

    Commercial Investments

    University Sports Center in Rzeszów

    University Sports Center in Rzeszów

    Single-family home

    Single-family home in Stąporków

    MODUS Metal Roof Tile

    Commercial Investments

    Orientarium, Łódź Zoo

    The Breeding and Exhibition Orientarium Building at the Łódź Zoo

    Single-family home

    A single-family home in the village of Tumlin

    MODUS Metal Roof Tile

    Multi-storySingle-family home

    Single-family home in the village of Przeczów

    OPTIMA Metal Roof Tile

    Commercial Investments

    Car dealership in Mikołów

    BMW M Dealership in Mikołów

    One-storySingle-family home

    A single-family home and a garden shed in Wola Rzędzińska

    SZAFIR Metal Roof Tile

    One-storySingle-family home

    Single-family home in Wola Rzędzińska

    REN Metal Roof Tile

    One-storySingle-family home

    Single-family home in Rytwiany

    MODUS Metal Roof Tile

    Multi-storySingle-family home

    Two-story single-family home in Józefów

    STAND-UP SEAM ROOF PANELS

    Single-family home

    Single-family home in Białystok

    REGLE Roof Panels

    One-storySingle-family home

    Single-family home in Bydgoszcz

    STAND-UP SEAM ROOF PANELS

    Commercial Investments

    Polonez Plus in Kielce

    The Polonez Plus manufacturing plant in Kielce

    One-storySingle-family home

    Single-family home in Końskie

    REN metal roof tiles combine durability and aesthetics

    Commercial Investments

    Pex-Pool Plus Dębica

    Pex-Pool Plus Dębica

    Commercial Investments

    "Dwór Dobarz" Guesthouse

    REGLE roof panels, imitation wood shingles, Zakopane style

    One-storySingle-family home

    Single-family home in Stąporków

    The PŁASKA PLUS metal roof tile is an excellent choice for modern construction, and its flat surface is very popular among developers.

    One-storySingle-family home

    Single-family home in Wola Rzędzińska

    TIGRA Metal Roof Tiles — the perfect solution for homeowners looking for a flat roof surface

    One-storySingle-family home

    Single-family home in Wymysłowo

    The RUBIN metal roof tile is a harmonious blend of classic style and functionality.

    One-storySingle-family home

    Single-family home in Białystok

    A classic with a modern twist. FIORD metal roof tiles used to cover a single-story house with a modern design.

    Single-family home

    Single -family House Tuczępa

    Single-family home

    A single -family house in Rytwiny

    Single-family home

    Single -family house, Staszów

    Single-family home

    Villa Niepołomice

    Single-family home

    Arkadia Investment housing estate

    Commercial Investments

    Sevilla Gold Hotel

    Single-family home

    Single-family home, Pliskowola

    Commercial Investments

    Arena Grupa Azoty in Puławy

    Commercial Investments

    Kielce Bus Station

    Avant-garde design in a public building

    Single-family home

    A single -family house in Rudna near Rzeszów

    Flat metal sheet, single -family house in Rudna

    Single-family home

    Gable-roofed house in Końskie

    Commercial Investments

    Flat metal tile market, Orzysz

    Single-family home

    Trapeze

    Single-family home

    Modus

    Single-family home

    Detached house complex roof. Modus roof tile

    Modus metal roof tile, multi -track roof

    Commercial Investments

    Mercedes

    Mercedes

    Commercial Investments

    Leroy Merlin

    Leroy Merlin

    Do you have any questions?

    What kind of gutters should I use with metal roof tiles?
    The choice of gutters for metal roof tiles depends mainly on the size (surface area) and pitch of the roof, as well as aesthetic preferences. The primary consideration is the material from which the gutters are made—PVC and metal gutters are available on the market. It’s worth noting that metal gutters, coated with protective finishes, are much more durable, resistant to changing weather conditions, and blend in more aesthetically with metal roofing. We encourage you to explore our selection of NIAGARA metal gutters: NIAGARA METAL GUTTERS
    What are the estimated costs of purchasing and installing facade sheets?
    The price of elevation panels, depending on the type of protective coating, is available on our website in the "Price Lists" section, on the "Downloads" subpage. Regarding assembly costs, we recommend contacting a contractor. As a manufacturing company, we do not directly carry out projects using our products. However, for any project involving assembly and construction, we recommend using the services of experienced and professional contractors. The total price is certainly significantly influenced by factors such as the complexity of the project, the scope of work, and the number of custom elements and additional components required by the project, all of which can increase the final cost.
    What are the methods for installing elevation panels made of sheet metal?
    Many contractors are highly skilled at assembling PS panels. The Pruszyński Company conducts annual training sessions where participants can also deepen and refine their assembly techniques. On our website, www.pruszynski.com.pl, you’ll find assembly instructions that will help you install the facade professionally. An increasing number of different types of assembly components are appearing on the market, making it easier to properly install PS elevation panels.
    What are the differences between painted sheet metal elevation panels and color-coated ones?
    The coating process takes place at the steel mill itself, under very strictly controlled conditions and following a specific procedure that is essentially impossible to replicate even in a professional paint shop. As a result, sheets coated in a given color are exceptionally durable in terms of both UV resistance and weather resistance. An equally important advantage of using mill-coated sheet metal is a significant reduction in the production process, which means that the customer can receive their order much faster. However, this also means there are certain limitations regarding the availability of non-standard colors—which are restricted by current inventory levels. For large orders, it is possible to order sheet metal in any color and coating, but this significantly extends the lead time. In such cases, we very often use powder coating services. When it comes to powder coating, it is very important to provide recommendations in advance regarding the conditions of the structure on which the panels will be installed. In this way, even with powder coating, we can meet requirements for both corrosion resistance and UV resistance.
    Can exterior metal panels be used on a single-family home?
    Elevation panels can be used in most building structures as facades. The elevation panels are also used as a finishing element for the facade—or even as a section of it—to highlight certain architectural features or as part of an architect’s design. They are ideal both as the main elements of a facade and as a complement to other facade materials. Therefore, there is no reason why they cannot be used on single-family homes, provided their assembly is carried out in accordance with best roofing practices.
    What designs and finishes are available for sheet metal elevation panels?
    The Blachy Pruszyński Company offers one model of elevation panel— the PS Panel—which is available in two widths: 315 mm and 215 mm. The length of the panel is tailored to the facade’s geometry and manufactured according to the customer’s order. By pre-bending the panel during assembly, we not only achieve a visual effect but also prevent the panels from “waving” due to factors such as heat.
    Additionally, depending on the selected coating, our panels offer a very wide range of colors, and for custom orders, we are able to supply panels in any color. An interesting solution is the use of sheet metal with a wood-grain coating to achieve the look of a wooden facade without the need for maintenance, as is the case with natural materials. However, this requires consultation with the technical and sales departments to confirm the conditions, production capabilities, and material availability.
    How should the metal roof tile be stored until assembly?
    If assembly is to take place within approximately 3–4 weeks of production, simply cut open the packaging and place the package at a slight angle so that any rainwater can drain off.
    If this period is to be longer, it is absolutely necessary to cut open the packaging and insert spacer strips between the sheets to allow for free airflow. The package must not rest directly on the ground. The sheets should be stored in a dry and well-ventilated place.
    Detailed storage instructions are always provided on the product label attached to the package.
    Why is a gutter system so important for the entire building?
    Gutters play a key role in maintaining the integrity of a building by draining rainwater from the roof and preventing damage to the structure and foundation. Furthermore, stormwater management is becoming an increasingly important issue, and a good gutter system makes it easy to collect rainwater for reuse. Nowadays, the choice of materials for a gutter system is no longer limited to traditional solutions. Metal gutter systems are gaining popularity, combining not only functionality but also aesthetics and durability.
    Does a metal gutter system rust?
    Metal gutter systems are exceptionally durable. In the case of steel systems, this is largely due to the modern polyurethane protective coatings used by leading manufacturers. Additionally, the modular design of these systems offers a full range of components necessary for proper assembly. These components are also factory-manufactured and properly protected. They are often made from the same top-quality materials as the gutters themselves. As a result, when assembled correctly, the lifespan of a metal gutter system is measured in decades, both in terms of rust resistance and UV resistance. However, this requires assembly by an experienced roofing team in accordance with the manufacturer’s recommendations.
    Does a metal gutter system look good?
    Metal gutter systems offer a wide range of styles and finishes, allowing building owners to customize their gutters to suit their individual tastes and the building’s architecture. Thanks to the variety of available shapes, profiles, and colors, metal gutters can be an integral part of a building’s design, adding elegance and a modern touch. By incorporating unique lines and details, metal gutter systems can also serve as a medium for creative expression for designers and architects.
    Are metal gutter systems environmentally friendly?
    Metal gutter systems not only offer durability but are also more environmentally friendly than some other materials. Many manufacturers of gutters made from other materials use recycling and low-carbon production methods, which help reduce the negative impact on the planet; however, even recycled plastic gutters have a greater environmental impact than metal ones. Their lifespan is also a factor, and it is typically shorter than that of metal gutters. Additionally, metal gutters can help collect and utilize rainwater, which is an eco-friendly solution that supports sustainable development and efficient water management.
    .
    How long does a gutter system last?
    One of the key advantages of metal gutter systems is their exceptional durability. Metal is a material that is resistant to weather conditions, corrosion, and mechanical damage. Compared to traditional materials such as wood or PVC, metal gutters retain their appearance and functionality for longer, which translates into savings on maintenance and replacement. In regions with extreme climatic conditions, metal gutters are an indispensable solution. Their resistance to UV radiation, rain, snow, hail, and even strong winds ensures that these systems retain their properties for many years, minimizing the need for repairs or upgrades.
    Is it possible to install copper flashings on a steel roof?
    Caution must be exercised when using copper, as copper oxides are highly corrosive and cause corrosion of other metals. For this reason, it must not be combined with other types of metals on buildings (copper reacts upon contact and causes electrolytic corrosion of other metals).
    Why are metal roof tiles recommended for renovating old roofs?
    This is directly related to its light weight. In the case of old roofs, the roof trusses of renovated houses are often already somewhat worn down by time. Therefore, it is safer to use metal roof tiles, which weigh around 4.7 kg/m², rather than ceramic roof tiles, which are nearly ten times heavier. However, it’s always a good idea to have a specialist inspect the condition of the roof truss and confirm whether it requires renovation or replacement after all. In such cases, the safety of the building’s residents or employees, as well as the installation crew, is always the top priority. In most situations, however, the condition of the structure allows for the use of metal roof tiles without major issues, whereas the use of ceramic roof tiles would no longer be possible.
    Can I use an angle grinder to cut sheets?
    Modern roof coverings preclude the use of angle grinders for cutting. Using this method to cut the material will void the Warranty.
    An angle grinder generates a great deal of heat during operation and cutting, which in turn damages the edges of the sheet metal as well as its protective coating. Additionally, the metal shavings produced during operation become embedded in the sheet metal’s surface, creating potential corrosion sites.
    The proper way to cut sheet metal is to use automatic nibblers or hand shears. These tools use mechanical force to cut the sheet metal without exposing it to extreme temperature fluctuations. Additionally, it’s worth remembering that after cutting, it’s a good idea to protect the cut edges with a dedicated protective varnish or special paint.
    W jaki sposób zabezpieczyć drobne uszkodzenia powłoki blachodachówki, które powstały przy montażu?
    Most of the roof coverings in the Blachy Pruszyński Company’s product line offer a selection of specialized coatings using protective finishes. These are technologically advanced and modern materials that are applied to our products under special conditions. They are available in several variants, ensuring not only exceptional durability (covered by a Warranty) but also unique and interesting aesthetic effects for roof coverings. They are subject to very strict requirements and are under constant supervision through laboratory testing.

    However, minor damage to the coating may sometimes occur during installation work. If the damage is not significant or is not located in a critical area of the roof, touch-up paints can be used to repair it. They provide a relatively easy way to protect the damaged area from external factors. This solution is often very cost-effective, as it does not require replacing the entire element—which would involve removing the old section and performing assembly with a new one. If you have any doubts about whether this solution is suitable for a specific case, we encourage you to contact our specialists or one of our partners who offer our products.
    How can I advertise a product? Where can I find more information?
    Complaints should be filed at the wholesale store where the purchase was made. If the wholesale store in question has closed (is no longer in business), the completed complaint form should be sent directly to Pruszyński Company at the following address: pruszynski@pruszynski.com.pl

    A complaint form is available in the "Downloads / Forms" section or directly here: COMPLAINT FORM

    More in this category

    Lakier zaprawkowy - NIAGARA Tytanium Touch-up paint
    NIAGARA - Gutter accessories
    See product
    Slide paste Slide paste
    NIAGARA - Gutter accessories
    See product
    Klej uszczelniacz dekarski do rynien i blach, Den Braven, miniature Roofing sealants
    Roof and Gutter Accessories
    See product

    Articles

    CSR, Sponsoring sportowy
    Byśkiniewicz and Jastrzębski Are the Second-Place Finishers in the 2026 RSMP Polish Championships

    The 2026 season brought Łukasz Byśkiniewicz and Łukasz Jastrzębski a string of strong results and a spot on the podium in the RSMP overall standings. They finished the final Wisła Rally in 3rd place, securing the title of Second Polish Vice-Champions.

    Read more
    CSR, Sponsoring sportowy
    Michał Cieślak is the WBC world champion—the next chapter in the career of Blachy Pruszyński Company, the ambassador

    Michał Cieślak has become the WBC junior heavyweight world champion! Blachy Pruszyński Company, after winning the interim title in 2025, was awarded the full championship belt. This marks the next stage in the career of the Polish boxer, who has been among the world’s best for years. More major challenges lie ahead for him.

    Read more
    CSR, Sponsoring sportowy
    The Academy of Crafts Continues to Grow—Paweł Francuz Named New Ambassador, Ryszard Piwowski Named Honorary Ambassador

    The Academy of Crafts is embarking on the next phase of its activities. During the annual meeting in Sokołów, plans were made for upcoming training sessions, participation in trade shows and industry events, and other initiatives. The new Brand Ambassador, Paweł Francuz, also attended the meeting. Ryszard Piwowski, who has been associated with the Academy for many years, was named Honorary Ambassador.

    Read more