Below is a sample of projects we have carried out where the house has a brick work finish. The holes when filled are not very visible.

It may be necessary to carry out a boroscope test where it is uncertain as to the existence of cavity wall or cavity block. It won’t cost you anything to get Hometherm out to give a free quote and to determine if your home has a cavity suitable for filling with Envirobead.

If your house was built prior to 2006 you can avail of a €400 grant towards the cost of Cavity Wall Insulation with Envirobead. For further information go to our section on SEAI / Government grants.

One of the primary functions of a cavity is to stop driving rain and dampness from transferring from the outer leaf of the wall to the inner leaf. Water must be drained away and not cross over the cavity. Using polystyrene bead ensures your cavity works as effectively as it did before polystyrene bead insulation is introduced to the cavity. Between each bead there is a small space for water to drain down through the beads naturally, as illustrated in the graphic below. Polystyrene does not soak water. e.g. Polystyrene cups are used for tea, coffee etc.

Yes. Imagine a cup made of polystyrene full of boiling tea. You can still hold the outside of the cup and not burn your hand yet the thin wall of the cup is holding the heat of the coffee inside. The cup is only 3mm thick and your cavity is many multiples of this.

Holes are drilled in the external walls in an NSAI (National Standards Authority of Ireland) approved pattern and the bead is injected into the cavity under high pressure. (Click here for NSAI Certification). Through gravity and this pressure the bead naturally flows to the bottom of the cavity and continues to fill upwards. The beads will continue to fill any available space. When the cavity is full pressure builds internally and back pressure automatically stops the injection gun. (Just like when you’re filling petrol)