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Why Blown Bead Cavity Wall Insulation?

An un-insulated home loses around a third of it's heat through it's external walls

Installing blown bead cavity wall insulation will meet and exceed Part L of the Building Regulations effective in October 2010

Compare the options

Blown bead offers clear technical advantages over mineral fibre.

Here are the facts:

Lamda values

Mineral fibre
0.040

White EPS bead
0.040

Standard Grey EPS bead
0.033

Enhanced Grey EPS bead
0.032

Facts about Blown Bead Cavity Wall Insulation

  • Blown bead cavity wall insulation has a Lambda value of 0.032 to 0.033 and a 0.27 W/m2K U value or better is achievable when filling 85 to 100mm cavities.

  • The bead is installed through holes drilled into the wall (hence cavity wall insulation). On existing properties the holes will be drilled through the external wall. On new build the holes would be drilled through the inside wall, prior to plastering or plasterboard. All the holes will be made good and are invisible after the job is completed.

  • The blown bead cavity wall insulation is extremely effective in both new build or existing properties.

  • Installation of blown bead cavity wall insulation can be carried out in all weathers and there is no site storage required as it is delivered and installed all in one day.

  • Blown bead offers a proven 100% cavity fill, ensures no cold spots, gives fully guaranteed insulation and eliminates the need for bricklayers to install fitting boards – a time consuming process that can add as much 12% extra time spent on a build.

  • Blown beads in situ will not allow water to cross the wall construction. The beads themselves allow the safe dispersal of any water. The gaps that naturally occur between the spherical beads allow any water to drain down freely to the ground, rather than across to create damp problems on inside walls.

  • The structure of the installed blown bead allows the cavity to retain the ability to breathe as intended with the cavity wall insulation in place.

Benefits of Blown Bead

With blown bead cavity wall insulation there is:

  • Outstanding durability – blown beads are rot proof, water resistant and sufficiently stable to remain effective as an insulation for the life of the building.

  • No settlement – as the blown beads are coated with an air drying bonding agent during installation. There is no possibility of settlement occurring. The insulation remains in place for the life of the building ensuring that it is not possible to create gaps at the top of the property.

  • A consistent density of insulation

  • Constant thermal projection throughout the installed area.

  • No wastage – the beads flow unrestricted, totally filling the cavity, forming a homogeneous heat saving mass.

  • A straightforward installation process that is time efficient and has a low H&SE liability.

Thermal Images Before / After Cavity Wall Insulation

The following thermal images demonstrate the effectiveness of Blown Bead cavity wall insulation.

Front right elevation prior to cavity wall insulation.

Front right elevation after cavity wall insulation installed.

Left elevation prior to cavity wall insulation.

Left elevation after cavity wall insulation installed.

Right elevation prior to cavity wall insulation.

Right elevation after cavity wall insulation installed.

Rear left elevation prior to cavity wall insulation.

Rear left elevation after cavity wall insulation installed. Hot spot shows downpipe which has had hot water running through it.

Rear right elevation prior to cavity wall insulation.

Rear right elevation after cavity wall insulation installed.

Sustainability

  • Zero ODP (Ozone Depletion Potential)

  • Low GWP, less than 5 (Global Warming Potential)

  • BRE Ecopoints rating of 0.043

  • CFC, HFC and HCFC free

  • No wastage on site

  • Green guide summary 'A' rating

  • 100% recyclable

Use an NBBA member to ensure that your cavity wall insulation installation is handled correctly. Our members Thermabead, Moulded Foams, Energy Store, Polypearl and Kay-Metzeler are currently drawing up a code of conduct that will guarantee your blown bead cavity wall insulation has been installed to the highest industry standards. An un-insulated home loses around a third of its heat through its external walls.