Why blown bead cavity wall insulation?

An uninsulated home loses around a third of its heat through the external walls

An uninsulated home loses around a third of its heat through the external walls

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

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 µ-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.

Compare the options

Blown bead offers clear technical advantages over mineral fibre.

Here are the facts:

Lamda values

  • Mineral fibre0.040
  • White EPS bead0.040
  • Standard Grey EPS bead0.033
  • Enhanced Grey EPS bead0.032

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.

thermal image EPS Blown Bead cavity insulation

Front right elevation prior to cavity wall insulation.

thermal image EPS Blown Bead cavity insulation

Front right elevation after cavity wall insulation installed.

thermal image EPS Blown Bead cavity insulation

Left elevation prior to cavity wall insulation.

thermal image EPS Blown Bead cavity insulation

Left elevation after cavity wall insulation installed.

thermal image EPS Blown Bead cavity insulation

Right elevation prior to cavity wall insulation.

thermal image EPS Blown Bead cavity insulation

Right elevation after cavity wall insulation installed.

thermal image EPS Blown Bead cavity insulation

Rear left elevation prior to cavity wall insulation.

thermal image EPS Blown Bead cavity insulation

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

thermal image EPS Blown Bead cavity insulation

Rear right elevation prior to cavity wall insulation.

thermal image EPS Blown Bead cavity 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