In the video excerpt, using a special mock-up of a cavity wall, we see how the special flow properties of the bead give total insulation. Watch as the beads are blown into the cavity.
See the way the beads flow to fill the space. This is because of the special flow properties of the EPS bead which no other material can match.
You can see a vortex is created and the beads flow at high speed like liquid into every part of the cavity, they seek out all the gaps and imperfections in the cavity and in minutes every void around services, joists, conduits, doors windows and other internal structures are filled with thousands of beads to ensure no cold spots.
Blown beads provide thermal insulation at its most efficient and because every bead is 98% air captured within the polystyrene, this material gives lambda values which are superior to any other insulation allowing building regulations to be easily met or exceeded.
After each cavity is filled, the beads settle immediately and become bonded to form a virtual solid layer of insulation which is stable yet allows the cavity to breathe as intended and once settled gravity will no longer affect the integrity of the bead which means there will be no on-going settlement issues which can affect other types of cavity insulation.