Types of Extruded Aluminum Profiles for Facades
Planks & Panels (Rainscreen Cladding)
Planks and panels really form the backbone of rainscreen cladding systems, offering both solid weather protection and a lot of flexibility when it comes to design. These extruded aluminum profiles are crafted through precise manufacturing processes, which means you get consistent shapes and durability you can rely on. The way rainscreen cladding works is by creating a ventilated space between the cladding panels and the main building structure. This gap helps manage moisture and boosts the building’s thermal performance—a big plus for energy efficiency. Thanks to aluminum’s natural resistance to corrosion and its strength, it’s a go-to material for these exterior uses.
It’s worth considering that in many commercial and institutional construction projects, rainscreen systems using extruded aluminum profiles are chosen because they meet strict energy codes and help keep the building envelope secure. The ventilated cavity isn’t just for show—it helps prevent moisture issues, lowers the risk of mold, and can really extend the lifespan of the building itself. This method is recognized by organizations like the American Architectural Manufacturers Association (AAMA) and is often referenced in green building standards for its positive impact on thermal efficiency.
Flat planks
Flat planks are a favorite in façade design, especially if you’re after a clean, minimalist look. These profiles have a smooth surface and can be installed in different directions—horizontal, vertical, or even diagonal—depending on what the design calls for. Flat planks are available in a wide range of finishes, such as anodized, powder-coated, or woodgrain, giving architects and designers plenty of creative freedom. If you want a modern, seamless appearance, flat profiles are often the way to go. They work well with different aluminum systems and can also be combined with other materials for interesting visual contrast.
For example, you’ll see flat planks on many office buildings and apartment complexes where a sleek, contemporary style makes a statement. Some manufacturers even offer custom lengths and widths, which means fewer joints and a smoother overall look. Plus, combining flat planks with glass, stone, or other cladding materials lets designers create truly dynamic building exteriors.
Ribbed/striated profiles
Ribbed or striated profiles stand out because they have raised or recessed lines running along the surface. These lines add texture and depth to the façade, giving the building more character. But it’s not just about looks—the ribbing can also make the panels more rigid, which helps reduce issues like oil canning or sagging, especially in larger panels. Ribbed planks are often chosen for public buildings, schools, or commercial spaces where you want to break up large surfaces with some extra detail. They’re also a good fit for rainscreen assemblies and can even improve the wall system’s acoustic properties.
Something you should keep in mind is that ribbed profiles can help disguise minor imperfections in the structure or small installation misalignments. That’s a real plus for both new builds and renovations. Sometimes, ribbed designs are picked to echo traditional architectural styles, all while offering the performance benefits of modern extruded aluminum.
Shiplap/interlocking boards
Shiplap and interlocking boards are all about creating a secure and seamless connection between panels. The edges are designed to overlap or fit tightly together, which improves water resistance and helps prevent wind-driven rain from getting inside. These boards are a smart choice in places where the weather can be tough and you need a reliable barrier. Depending on the reveal width and joint style, the look can be either classic or modern. The tight fit also makes installation and maintenance more straightforward, so they’re a practical pick for both new projects and renovations.
For instance, shiplap boards are often used in buildings near the coast, where wind and rain can be relentless. The interlocking design helps the façade hold up over time, even as the building expands and contracts with temperature changes. Many manufacturers put these systems through rigorous testing to make sure they meet standards like ASTM E330 for structural strength and ASTM E331 for water resistance.
Battens & Slats (Screening/Accents)
Battens and slats made from extruded aluminum are popular for architectural screening, sun shading, and adding decorative accents. Besides giving the building a unique look, they serve important roles such as managing daylight, increasing privacy, or hiding mechanical elements. Whether you choose rectangular, square, or tubular shapes depends on the style and the practical needs of your project.
In addition, battens and slats can play a big part in sustainable building practices. By providing shade, they help reduce heat gain inside the building, which can lower cooling costs and support compliance with energy codes and green building certifications.
Rectangular and square battens
Rectangular and square battens are among the most widely used profiles for screening and accent features. Their straight lines make it easy to line them up neatly and create appealing shadow effects across the façade. These battens are often used for sunshade fins, privacy screens, and both vertical and horizontal accents. Using durable Extruded Aluminum means you get something that stands up to corrosion and needs very little maintenance over the years. You can also customize the width, depth, and finish to suit your overall design.
For example, rectangular battens might be installed in office parks to create vertical fins that not only look distinctive but also provide useful shade. In apartment buildings, square battens can be arranged horizontally to hide balconies or mechanical systems. Their flexibility means you can solve design and performance challenges creatively.
Round/Tubular slats
Round and tubular slats offer a softer, more organic look compared to the sharp angles of other profiles. These shapes are often used where you need airflow, such as in mechanical screens, balcony railings, or ventilated façades. Tubular slats are also a favorite for decorative projects, especially when you want to mix and match different profiles for added interest. Because of their structural strength, these slats can span longer distances without bending, and they’re available in a variety of powder-coated colors. You can mount them directly to subframes or use them as part of proprietary aluminum systems.
A good example is parking structures, where round slats provide security, allow for ventilation, and add visual appeal. Tubular profiles are also used in sunshade devices, where their curved surfaces help soften sunlight and cut down on glare inside the building.
Structural & Attachment Profiles
Structural and attachment profiles play a crucial role in supporting and securing the visible parts of the façade. These extruded aluminum components are designed to handle loads, adapt to expansion and contraction, and keep the whole system stable. It’s important to mention that following building codes and facade standards is key to ensuring safety and long-term performance.
Choosing and detailing these structural profiles means thinking about things like wind loads, seismic activity, and the weight of the cladding. Engineers usually refer to standards from organizations like the International Code Council (ICC) and the American Society of Civil Engineers (ASCE) when putting these systems together.
Rails, girts, and carriers
Rails, girts, and carriers are essential to rainscreen and cladding assemblies. Rails can run horizontally or vertically, distributing loads and providing attachment points for panels or slats. Girts are similar but usually run horizontally to support the secondary framing. Carriers are specialized profiles that hold and align planks, panels, or battens, often featuring grooves or integrated fixing systems. Picking the right type and spacing for these profiles is vital for wind resistance, alignment, and allowing for natural movement due to temperature changes.
For example, in tall buildings, rails need to be spaced and sized to handle wind forces unique to the building’s height and location. Carriers with adjustable brackets help account for variations on site and keep the entire façade looking even and flush.
Brackets (fixed vs. sliding points)
Brackets connect the structural subframe to the main building structure. There are two main types: fixed and sliding point brackets.
Fixed brackets hold everything securely in place.
Sliding point brackets allow for movement that happens with thermal expansion or building settlement.
Using both types correctly helps prevent stress and deformation in the façade. The material and finish of the brackets should meet the necessary standards for durability and to ensure they’re compatible with aluminum cladding.
In practice, you’ll often find fixed brackets at key support points and sliding brackets spaced along the rails or carriers to handle movement. This setup is especially important in places with big temperature swings, since aluminum naturally expands and contracts with heat and cold. Using the right bracket system helps keep your aluminum siding and panels looking good and performing well for years.
Trim & Edge Profiles
Trim and edge profiles are the finishing touches that make a façade look polished and also protect the panel edges and seal the joints. These profiles aren’t just for show—they’re crucial for both how the building looks and how well it keeps out the weather.
Trim profiles are usually chosen to match or complement the main panel finish, so everything looks cohesive. Just as important, well-designed trim helps prevent water from getting in, which is key to meeting building codes and avoiding expensive repairs down the road.
Starters, end caps, and reveals
Starters: First profiles installed, usually at the base or edge of the façade, providing a level foundation for the panels or planks that follow.
End caps: Close off exposed ends, keeping water out and ensuring a finished appearance.
Reveal profiles: Create intentional gaps between panels or at corners, adding definition and depth to the façade.
You can find these profiles in different sizes and shapes, so it’s easy to customize for your project’s needs.
For instance, in civic buildings, reveal profiles are often used to highlight the geometry of the panels and create attractive shadow lines. End caps are especially important in rainy areas to keep water out of vulnerable panel edges.
Corners (outside/inside), J- and Z-profiles
Corner profiles help create smooth transitions around both outside and inside building corners. These can be single-piece extrusions or assembled on site for more flexibility.
J- and Z-profiles are commonly used for edge trims, flashing, or to cover up exposed panel edges.
They’re essential for directing water away from areas that could be at risk and for giving the façade a tidy, professional look. It’s important to match the finish and size of these trim profiles to the main aluminum panels for a unified design.
For buildings with complex shapes—think multiple projections or recesses—J- and Z-profiles can be custom made to fit unusual angles. Using these profiles is crucial for stopping water from leaking in at transitions, something that’s required by many building codes and recommended by façade experts.
Functional Shapes
Functional extruded aluminum shapes, like channels and specialty sections, are used for structural reinforcement, attachment, and custom architectural details. Their versatility makes them easy to integrate into all kinds of façade systems and construction methods.
These shapes also come in handy for custom features, such as decorative frames, supports for sunshades, or even mounting signage. Because aluminum can be extruded into complex cross-sections, designers have a lot of freedom to create unique solutions that might not be possible with other materials.
L-, T-, U-channels
L-channels, T-channels, and U-channels are multipurpose profiles used throughout façade assemblies.
L-channels: Great for edge support, framing, or connecting subframes.
T-channels: Provide a web for dividing panels or supporting loads in the middle of a wall.
U-channels: Hold panels in place, work as trim, or serve as sliding connections.
Each type can be ordered in different thicknesses and alloys to meet both structural and design needs. Their compact size makes them a good choice for installations that need to be hidden or, on the other hand, for details you want to show off.
For example, U-channels are often found in curtain wall systems to secure glass or panel inserts, while L-channels are used for perimeter trims or reinforcing corners. The choice of alloy and finish can be tailored to your project, especially if you need extra strength or corrosion resistance in places like coastal areas.
Hat and Z sections
Hat sections and Z sections are special extrusions used for structural and attachment purposes.
Hat sections: Typically used as girts or furring channels, providing stability and a mounting surface for panels or battens.
Z sections: Useful for overlap joints, subframes, or creating stepped transitions between layers of cladding.
Their shapes help with drainage and ventilation, which is important for rainscreen systems. Choosing the right profile helps ensure you meet building codes and get the most out of your aluminum siding, aluminum cladding, and aluminum panels for exterior projects.
For example, hat sections are often specified in ventilated façade systems to keep airflow consistent behind the cladding. Z sections are popular in overlapping panel designs, making sure water drains off properly and panels line up just right. Both types are key for meeting the structural and waterproofing standards set by the AAMA and ASTM International.
