Breffni Insulation
Wall Insulation
Significantly improve the Thermal Performance of your walls with Bonded Bead Cavity Wall Insulation
What is KOREFill Bonded Bead Cavity Wall Insulation and How is it Installed?

KOREFill Bonded Bead Cavity Wall Insulation is loose Silver Expanded Polystyrene Insulation (EPS) that is pumped into the cavity with a water-based bonding agent. Once pumped into the cavity the bead solidifies to form an insulated mass.
To install the product properly the installation team follows a strict drilling pattern to ensure all areas of the cavity are completely filled. In new buildings the holes are drilled from the inside, in existing buildings the drill holes are drilled from the outside. The Breffni Insulation Installer will fill the drill holes completely and match the finish to the existing house.
The KOREFill Bonded Bead Cavity Wall Insulation System is completely certified by the Irish Agreement Board and NSAI and the Breffni Insulation team is fully trained and certified to install the system.
Benefits of KOREFill Bonded Bead Cavity Wall Insulation System
U-values Options
New Builds: The U-value of KOREFill is only limited by the width of the cavity. Wall Type – 19mm external render on 100/100/100 block cavity wall (100mm clear cavity) with 12.5mm internal plasterboard will achieve a U-value of 0.31 W/m²K while a 150mm cavity will achieve a U-value of 0.21W/m²K.
Existing Builds: Where a home has existing insulation in the cavity, pumping the remainder of the cavity with Bonded Bead will significantly improve the thermal performance of the wall. U-value calculations for residual filling of partial fill cavity walls are dependent on the thickness and type of existing insulation and the width of the residual cavity.
KOREFill U‐value Summary Table
Element Type: Cavity Wall Insulation Calculation Method: I.S. EN ISO 6946, I.S. EN ISO 13370
Cavity Thickness (mm) | U-Value W/m2K |
50 | 0.55 |
75 | 0.39 |
100 | 0.31 |
125 | 0.25 |
150 | 0.21 |
175 | 0.19 |
200 | 0.16 |
250 | 0.13 |
300 | 0.11 |
Wall: Render, Block, KOREFill Bonded Bead, Block, Plaster Skim.
Reduced Thermal Bridging
Cavity Benefits
Product Performance
The KOREFill System is rot-proof, water repellent, and durable and will not degrade over time. It will not prejudice the fire resistance properties of the wall. Once installed properly the KOREFill System will perform consistently for the life of the building.
Installation Benefits
KOREFill is only installed by fully trained and accredited installers. As a client you will not have to handle the product in any way. There is no site storage of waste facilities required and we will bring our own specialised machinery and equipment. The installation process will take no more than a day (weather permitting).
Compliance with Building Regulations
KOREFill satisfies all necessary compliance issues regarding Building Regulations 1997 to 2012. Walls using KOREFILL Cavity Wall Insulation can meet the current U-value requirements in Full Fill Cavity Wall Insulation applications depending on the cavity width.
Site Storage
The KOREFill product does not need to be stored on site. The installer will arrive on site and the product is installed directly from the bead truck into the cavity. The client will not have to handle the product.
Site Machinery
The client does not need any specialist equipment or machinery on site. The Breffni installers are fully equipped with their own equipment.
No On–Site Waste
Fill Certainty
The installation equipment and technique is designed to guarantee that every meter squared of the wall is completely filled. The client can be one hundred percent certain that the walls of the building are completely filled with insulating material.
Time Saving
Advantages of Bonded Bead Insulation
- Complies with part L of the 1997-2012 Building Regulations.
- Offers a range of solutions to the 1997-2012 Building Regulations.
- 15-20% higher thermal performance than other systems.
- Constant density.
- Will not crack or settle.
- Will not transmit moisture.
- Cavity remains breathable.
- No site handling or storage.
- No bulk ordering, therefore cash flow advantage.
- Speed of installation