EPS insulation beads

You want cavity wall insulation that will protect your home and save you money in the long-term. To achieve this you need three things:

  1. The right insulation material for your property
  2. An expert installation
  3. To maintain your home once the insulation is installed

The only cavity wall insulation we install is EPS (expanded polystyrene) beads – also referred to as blown beads because they are blown into the cavity at high pressure.

We believe EPS beads are the best material for cavity wall insulation available today. They are more thermally efficient and long-lasting than fibre or foam, which means they are also more cost-effective. In addition they are suitable for installation in a much wider range of properties.


What are EPS beads?

An EPS bead is simply a tiny sphere of polystyrene that is 98% air. It’s this air that gives the beads their outstanding thermal properties.

EPS beads do not deteriorate and, because of their shape, allow water to flow downwards. Therefore, any moisture that does enter the cavity after the beads have been installed will simply drain away to the ground. (If fibre insulation gets wet it will act like a sponge, drawing the water across the cavity and holding it against your walls).

EPS beads:

  • Reduce heat loss by up to 70%
  • Fill the entire cavity with no settlement and therefore no cold spots
  • Are up to 20% more efficient than standard fibre insulation
  • Will last as long as the building with no loss of efficiency
  • Are quick and easy to install
  • Are suitable for properties that are hard to access1
  • Are suitable for properties in high exposure areas (find out if yours is)
  • Come with a 25 year guarantee
  • Need no maintenance

Remember: as well as keeping your home warm in winter, cavity wall insulation will also help keep it cool in summer.

A quick and easy installation that will not damage your home

We install EPS bead insulation using a thermascopic bead lance2 that can extend up to 7.3 metres in length. This means we can reach previously inaccessible walls without any need for scaffolding or other access equipment.

Smaller and fewer drill holes

Using the lance to install EPS beads also means we need to drill smaller and fewer holes. A typical semi-detached house will only require 12 holes (4 per elevation) compared to 48 for fibre (16 per elevation). In addition, because the lance is inserted along the inside of a cavity, we drill the holes at the side of the property so there is no need to drill into the face of the wall.

We blow the beads into the wall along with an adhesive. When the beads have settled and filled the cavity the adhesive will dry and form a solid mass. However, as the beads are spheres there are still tiny air pockets that allow moisture to drain away and the cavity to breathe.

Because it’s so easy to install EPS beads, we can usually complete the work on your home in just a few hours.


If you’d like the best quality insulation for your home

call us on freephone

0800 292 2554



1 When we describe a property as hard to access, we mean one that:

  • Has a building attached to it that does not have cavity walls, such as a conservatory, shed or carport
  • Has an extension that has turned an external wall into an internal wall
  • Is on uneven ground which restricts the safe use of ladders
  • Could be at risk of damage if too many holes are drilled into it
    Because EPS beads are so easy to install, we can insulate hard to access homes in the same way as any other. However, fibre or foam insulation is not suitable for hard to access properties.

2 One of our directors, Gary, developed the thermascopic bead lance. You can read more about it on our Who we are page