Cladding a Steel Building: Essential for Functionality and Longevity

At Atlantic Steel Buildings, we have decades of experience designing and installing steel buildings across the UK. We are experts in understanding the elements critical to a structure's overall functionality, longevity, and regulatory compliance. One of the most important elements in a building's construction is cladding.

What is Cladding and Why is it Essential for Steel Constructions?

Cladding refers to the exterior skin or non-load-bearing layers applied to the outside of a building's primary frame. For a modern steel portal frame, cladding serves several crucial purposes:

1. Thermal Performance (Insulation): It provides the necessary thermal barrier to manage the internal environment. This is vital for meeting current Building Regulations (Part L) regarding energy efficiency, reducing heating/cooling costs, and maintaining comfortable working temperatures.

2. Weather Protection: It provides a primary defense against external elements like heavy rain, strong winds, and humidity, preventing water ingress and protecting the underlying steel structure from corrosion.

3. Fire Resistance: Certain insulated cladding panels, such as mineral wool core systems, are necessary to comply with boundary fire wall requirements and meet specific fire rating standards (Building Regulations Part B).

4. Aesthetics: Cladding defines the finished look of the building, offering various colours, profiles, and material finishes to meet planning requirements and design aesthetics.

Types of Cladding Systems for Modern Steel Buildings

When erecting a steel building, the choice of cladding system is usually split between two primary high-performance metal options, though external facades can be applied over them.

1. Composite Insulated Cladding Panels (The Industry Standard)

This system, often from manufacturers like Kingspan or similar market leaders, is the preferred choice for most commercial and industrial steel buildings due to its superior efficiency.

• Design: These are single, factory-manufactured panels featuring an external steel face, an internal steel liner, and a thick core of insulation (PIR or Mineral Wool) sandwiched between them.

• Speed and Thermal Efficiency: Composite panels are installed quickly and provide exceptional thermal performance (low U-values), making it simple to achieve current Part L Building Regulation compliance, which is critical for reducing energy outlays.

• Fire Rating: Mineral wool core panels offer the required high levels of fire resistance (up to 4 hours) for fire-rated walls.

2. Twin Skin/Built-Up Cladding Systems

This traditional method involves two separate layers of metal sheeting with an insulation layer (usually fibreglass quilt) installed in the cavity between them.

• Cost-Effective: Often the most inexpensive initial option, though installation is slower and requires more labour on-site than composite panels.

• Flexibility: Allows for easy customization of insulation thickness to meet specific U-value targets.

3. External Façade and Aesthetic Options

While the underlying structure is typically clad in high-performance metal panels, other materials can be used for aesthetic purposes.

The Overall Benefit of Insulated Cladding

In summary, choosing the right insulated cladding system helps your building achieve maximum energy efficiency. This not only assists commercial properties in staying within legally regulated temperature requirements but, more importantly, drastically reduces the need for temperature-altering devices, lowering energy expenditure and reducing the building's overall carbon footprint.

Need more information relating to the design, compliance, or installation of cladding for your bespoke steel building?

Give us a call on 01872 560488 or complete our quote request form to discuss your specific thermal and aesthetic requirements.