What information is required to specify a louvre system correctly?

Learn what information is needed to specify architectural louvres correctly, including airflow requirements, weather performance, acoustics, security, structural interfaces, and maintenance considerations.

Specifying an architectural louvre system correctly requires more than simply selecting a blade profile or appearance. To achieve the required performance, a number of technical, operational, and architectural criteria should be considered during the design process.

Before selecting a specific louvre profile or system type, it is important to establish the performance objectives of the opening. Airflow requirements, weather protection, acoustic performance, security considerations, maintenance access, and architectural intent should all be considered as part of a coordinated design strategy. By defining the required outcomes rather than prescribing a particular product too early, design teams retain greater flexibility to optimise performance, simplify interfaces, and identify value engineering opportunities as the project develops.

One of the most important requirements is the airflow performance of the system. Designers should understand the required airflow rate, acceptable pressure drop, and available façade area, as these factors influence the free area, blade geometry, and overall louvre size required.

The required level of weather protection should also be established. Factors such as building location, elevation, exposure, prevailing wind conditions, and the sensitivity of any plant or equipment behind the louvre will influence whether a standard weather louvre, high-performance rain defence louvre, or Class A weather louvre is appropriate.

Where noise control is a consideration, the required acoustic performance should be defined. This may include target insertion loss values, overall noise reduction requirements, or planning-related plant noise limits. Early engagement with the acoustic consultant can help ensure the selected louvre system aligns with the wider noise control strategy.

Design teams should also consider whether any security requirements apply. Certain applications may require security-rated louvre systems capable of resisting attack, protecting critical infrastructure, or preventing unauthorised access.

In addition to performance criteria, the following project information is often required:

• Required opening dimensions 
• Builder’s work opening sizes 
• Façade construction type 
• Structural support strategy 
• Preferred blade orientation 
• Material and finish requirements 
• Access and maintenance requirements 
• Fire strategy considerations 
• Integration with adjacent façade elements 

For solar shading systems, additional information such as building orientation, glazing specification, solar gain targets, daylighting requirements, and architectural intent may also be required to ensure the system performs as intended.

At Solinear, we regularly support architects, façade consultants, M&E engineers, and contractors in developing louvre and solar shading specifications. By establishing performance requirements early and understanding the wider project objectives, we can help ensure the selected system is technically appropriate, coordinated with the façade design, and aligned with the project’s operational requirements.