Partial Fill Insulation

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Properties that are built after the 1920’s are more likely to be constructed with two layers of brick. This leaves a space where insulating material can be injected or added. The transfer of heat through your walls is slowed by partial fill insulation so your heating remains inside your property. Effectively allowing you to save a significant amount annually. Therefore, the insulation essentially pays itself off over the years.

Partial fill is the standard choice for most new developments. It involves leaving a 25mm or 50mm gap between the outer face of the insulation and the external leaf. This has the advantage of reducing the chance of any moisture that does penetrate the outer leaf bridging through to the inner structure.

How to Install Partial Fill Insulation

To insulate using Partial-Fill, the professional drills small holes on the outside wall of your home. The installer then blows insulation into the cavity using special equipment. Once all the insulation is in, the installer fills the holes in the brickwork. The Insulation material is usually either mineral wool or polystyrene beads, but polyurethane foam may sometimes be used instead.

Global Warming

Getting a Partial Fill Insulation would reduce your carbon footprint and help make your home more energy efficient. You would be generating less carbon emissions along the way. As well as helping to save the planet you’ll be saving yourself a hefty sum as experts say you should be able to make back the installation cost in five years or less due to the yearly energy bill savings you will make.


Partial fill cavity features thermal insulation secured to the inner steel or timber framing system, leaving a cavity of air between the insulation and the outer part of the masonry. The cavity between the insulation and the outer leaf performs as a barrier to external moisture, preventing it from entering the inner wall. In addition to thermal properties, it has properties to reduce the spread of a fire.


Kingspan Kooltherm K8

Kingspan Kooltherm K8 is a premium performance rigid thermoset phenolic insulation board used in partial fill cavity walls, it is particularly suited for new build projects.
  • Negligible smoke obscuration
  • Unaffected by air infiltration
  • Resistant to the passage of water vapour
  • Easy to handle  and install
  • Ideal for new build and refurbishment
                                                 A wider selection of our Partial Fill Insulation products are available here.
Buy Partial Fill Insulation products with us today at or speak to one of our friendly staff on 02038839057
InsulationBee LTD, Office 276b, 182-184 High Street North London E6 2JA
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