Understanding illbruck’s i3 System: A High-Performance Window Sealing Solution
Understanding illbruck’s i3 System: A High-Performance Window Sealing Solution
When it comes to window and facade installation, achieving an airtight and weatherproof seal is critical for energy efficiency and long-term durability. illbruck’s i3 system is a universal, state-of-the-art sealing solution designed for the perimeter sealing of windows. It effectively seals out weather while sealing in comfort and energy savings, making it an essential component of modern, high-performance building projects.
What is the illbruck i3 System?
The illbruck i3 system is an externally weatherproof yet vapour-permeable window sealing system. It follows the principle of “inside tighter than outside”, ensuring proper interaction between the outer, middle, and inner sealing layers to maximise performance.
This system prevents thermal bridging around the window frame, a common issue that can lead to reduced thermal Insulation, building component damage and mould formation.
By choosing a highly effective sealing system like illbruck i3, the benefits of an A++ BFRC Window Energy Rating or a low U-value (e.g., 1.2 W/m².K) can be fully realised, leading to improved insulation and long-term energy savings.
The Three Sealing Levels Explained
1. External Protection: Weatherproof & Breathable
The outermost layer of the i3 system protects against wind, rain, and extreme weather conditions while remaining breathable. This prevents moisture from getting trapped within the structure, reducing the risk of mould and material degradation. One of the key products for the outer layer is the TP450 Compriband Timber Max | illbruck UK. This provides a weather tight seal against the most severe combinations of wind and rain.
2. Thermal & Acoustic Insulation: The Middle Layer
The middle layer provides effective filling and insulation of the window joint seal. By using appropriate insulating materials, this layer enhances thermal efficiency and soundproofing. Properly sealing this layer ensures compliance with DIN 18542 standards for joint sealing effectiveness. A key product for the middle layer is the FM330 Pro Foam Air Seal | illbruck UK, this is ideal for use as an air tight gap filler for general constructions joints including where movement is expected to occur.
3. Internal Airtightness: Preventing Moisture Ingress
The inner sealing layer is airtight, preventing warm internal air from escaping into the window joint, where it could cause condensation. This condensation prevention is crucial for maintaining thermal performance, preventing dampness, and ensuring long-term durability. The last part of the i3 system could be to use products such as the ME480 Butyl Tape BB | illbruck UK , which is a high strength sealing tape which will provides an air and fully watertight seal over the construction joint.
Why Choose the BBA-Accredited i3 System?
As building regulations evolve, new solutions are needed to meet stringent energy efficiency requirements. In June 2022, the UK updated Approved Document L (ADL), recommending the use of airtight tapes and membranes for window and door sealing to enhance air permeability control.
The illbruck i3 system is:
- BBA Accredited – Proving its fitness for purpose and long-term reliability.
- Designed for Modern Building Standards – Ensuring compliance with updated UK energy regulations.
- Cost-Effective & Simple to Install – Providing long-term benefits with minimal effort.
- Backed by a 10-Year Performance Guarantee – Offering builders and property owners a guarantee.
The illbruck i3 Window Sealing System is an industry-leading solution that enhances energy efficiency, prevents condensation, and provides long-lasting weather protection. By implementing this system, builders, architects, and property owners can achieve better comfort, lower heating costs, and improved building durability. If you are looking for a high-performance, BBA-accredited sealing system, illbruck i3 is the ideal choice.
