Preparation
We drill small holes in the external walls following a strict IAB-approved pattern.
Looking for a cost-effective, low-maintenance way to make your home warmer and more energy-efficient? Bonded bead insulation is one of the most durable and reliable cavity wall insulation systems available — and we’re here to install it to the highest standards.
Why choose bonded bead insulation?
Bonded bead insulation fills 100% of the cavity wall with thousands of tiny polystyrene beads, injected under pressure and bound together with a specialist adhesive. The result is a solid, breathable, and water-resistant layer that significantly improves your home’s thermal performance — without the risk of sagging or settlement over time.
At Complete Insulations, we use KOREFILL bonded bead insulation. It’s NSAI Agrement-certified and installed according to both manufacturer and SEAI guidelines. We’re a registered SEAI contractor, which means you may also qualify for grants that we apply upfront, reducing your initial out-of-pocket cost.
What to expect during installation
Every job starts with a free site survey and professional assessment. We check cavity width, wall condition, damp risk, and ventilation — and only proceed if your home is a good fit for bonded bead.
Most jobs are completed in less than a day with minimal disruption. The insulation process is carried out from outside, and there’s no need to move out or rearrange your home.
If all is in order, here’s how the process works:
Benefits of KOREFILL bonded bead insulation
- High thermal performance (improves BER rating)
- Will not sag or settle
- Water-resistant and breathable
- 24-year workmanship guarantee
- Fast, clean external installation
- Suitable for cavity walls up to 12m high
Concerned about damp?
We take damp issues seriously. If you’ve noticed condensation or patches of damp, we’ll investigate the cause before installation. Bonded bead can help reduce condensation-related damp, but it won’t fix rising damp or structural bridging. If we find any underlying problems, we’ll either resolve them or recommend the appropriate specialist before we begi
Safe and long-lasting
Bonded bead insulation is non-toxic, fire-safe (when installed to regulations), and won’t degrade or require maintenance.
The beads remain locked in place behind the walls — even if you renovate in the future.
In rare cases where work disturbs a filled cavity, we can advise on how to reseal or block off the affected area.
Is your home suitable?
We typically recommend bonded bead insulation for homes with:
- Brick cavity walls in good condition
- Minimum cavity width of 40mm
- External walls under 12 metres high
- Accessible walls (i.e. Not obstructed by extensions or neighbouring properties)
Get a free quote
Not sure what kind of walls you have? Book a free site visit and we’ll check your wall type, thickness, and cavity suitability.
Contact us today to schedule your free survey or request a quote.
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