Architectural louvers are decorative elements attached to building exteriors that perform a variety of functions. Similar to mechanical louvers, their primary function is to serve as a means of proper airflow or ventilation for a building while providing protection from weather. Unlike mechanical louvers, which prioritize performance over all else, architectural louvers focus on a symmetry between aesthetics and function.
The Functions of Architectural Louvers
Architectural louvers are slatted openings on a building’s façade or rooftop. Their key functions include:
- Aesthetics: enhance the building’s exterior and improve its aesthetic appearance.
- Ventilation: the slatted design lets the building breathe, allowing air to enter and exit the building.
- Weather protection: slats are angled to prevent water, debris, and wind from entering the building without sacrificing airflow.
- Screening: can help block the sun and create a privacy screen around sensitive or unsightly areas, like rooftop equipment.
- Noise control: reduce or prevent noise from the interior of the building or mechanical equipment.
Architectural Louvers for Aesthetic Appearance
To help achieve the desired look, louvers have customizable design options. Louvered wall systems have various blade styles, orientations, colors, and finishes to create a sleek appearance on the building’s exterior. Materials can also vary depending on performance needs. Aluminum blades are often used on wall louvers because of their lightweight and weather-resistant properties, but stainless steel and fiberglass blades are also common. Architectural louvers are prevalent on office buildings, residential or multi-family developments, museums, retail spaces, hospitals, and other commercial buildings.
Regardless of the style of architectural louver used, it’s important to be aware of the pros and cons of the design. For example, glazing louvers are unique and useful, but also have uncommon drawbacks. Glazing louvers have adjustable or fixed slats made of translucent glass or polycarbonate material that are installed in windows, exteriors, or curtain walls. These types of louvers allow for more natural light in the building, minimizing artificial lighting, while controlling sun glare and heat. However, they’re often more expensive, may not provide same thermal insulation as other louvers, and can require more maintenance and cleaning.
Types of Architectural Louver Blades
Louver capabilities are determined by the types of blades used. Here’s a rundown of the various types of blades typically found in commercial building louvers.
- Non-drainable blades: Angled blades intended for high airflow efficiency. Their simple design allows air to pass through without resistance. They offer limited water protection, but their focus on airflow makes these blades cost-effective and perfect for exhaust-only or sheltered areas.
- Drainable Blades: Angled with a gutter at the bottom to carry excess water out of the louver. Their high resistance to water makes them ideal for applications where water penetration is a concern and may damage equipment or other interior elements. With a more complex design, the cost of these blades will be higher than non-drainable blades, and they will also have slightly less airflow.
- Straight Blades: Also known as J blades, these have a flat surface. With no airflow resistance, these blades are the best option for when ventilation is the primary goal and water risk is minimal. These are not recommended for areas with exposed intakes.
- Baffle Blades: Also known as K blades, these are flat but have a raised section, like a step. This allows the blade to capture and redirect moisture before it passing through the louver without sacrificing airflow. This makes them ideal for areas with moderate rain exposure, or in buildings where ventilation is a required but protection against water is crucial, like hospitals, data centers, or buildings with exposed facades.
- Wind-Driven Rain Blades: With a curved or wave-like design, the design of these blades catches water and diverts it to internal channels and a drainable gutter system at the base. These blades are a higher-performance version of standard drainable louvers, and offer the greatest protection against water for any style blade. Their unique design provides a continuous, uninterrupted look, but has lower airflow efficiency. These blades are mostly commonly used in coastal or storm-prone areas to protect against wind-driven rain.
- Chevron/Sightproof Blades – V-shaped, curved, or angled in a repeating pattern, these blades are the best choice for screening while still allowing high airflow. As they create a visual barrier, they’re mostly used for privacy screening of sensitive or secure areas and rooftop equipment, and provide little water resistance.
- Acoustical Blades: Blades have a perforated underside and are filled with sound-absorbing material to reduce noise. These are ideal for intake and exhaust applications in noise-sensitive areas, as they reduce the sound levels coming from the interior of the building without sacrificing airflow. These blades are more expensive and also have a heavier and deeper design than standard louver blades.
Architectural Louvers for Commercial Buildings
Looking for louvered wall systems for your building? Our expert Architectural Solutions team can help determine the right louvers and blades for your project and aesthetic goals. We offer project management and QAQC (quality assurance and quality control) from pre-construction and through installation, as well as post-project warranty support. No matter the size, design, or purpose of your architectural louver project, we can assist.