€8,000 SEAI grant available

Cavity Wall Insulation Across Ireland

Walls lose more heat than any other surface in an Irish home — around 40% of the total. If your house has a cavity, filling it is the fastest and least disruptive way to stop that loss.

Wall insulation falls under the SEAI wall grant of up to €8,000, with higher fixed amounts for homeowners on qualifying welfare payments.

Full Details & Specification Book a Free Survey

Or call +353 85 713 5431 · €100 survey fee, refunded in full on order

Cross-section showing bonded insulation beads pumped through drill holes into the cavity between two leaves of block — Beads pumped into the cavity through the mortar joints

40%

of heat lost through walls

€8,000

maximum SEAI wall grant

1 day

typical installation

How cavity wall insulation works

Most Irish homes built from the 1930s onwards have a gap between two leaves of block. We drill a pattern of small holes in the mortar joints, pump bonded insulation beads into the cavity under pressure, then make the holes good so they are barely visible.

There is no work inside the house, no mess in your rooms, and no need to move out. Most homes are finished within a day.

Cavity wall insulation being pumped into a brick exterior wall through a drilled mortar joint, Ireland — Bonded bead insulation being pumped into the cavity through a drilled mortar joint

AGI Construction — Bonded bead insulation being pumped into the cavity through a drilled mortar joint

Does your house have a cavity?

Homes built roughly between 1930 and 2005 usually do. Solid stone, 9-inch solid block and hollow-block construction do not — those need external wall insulation or internal dry-lining instead.

We confirm the construction by inspecting the wall thickness and drilling a test bore at the measuring visit, before anything is quoted.

When cavity fill is not the answer

We will tell you if your cavity is unsuitable. Walls that are exposed to driving rain on a badly weathered elevation, cavities already partially filled with debris, or homes with existing damp problems need those issues resolved first. Pumping insulation into a wall that has a water ingress problem makes the problem worse, not better.

Common questions

How long does cavity wall insulation take?

Most homes are completed in a single day, with no internal works and no need to leave the house.

Will the drill holes be visible?

The holes are made in the mortar joints and filled with matching mortar afterwards. On most homes they are very difficult to spot once complete.

Can cavity wall insulation cause damp?

Correctly assessed and correctly installed, no. The risk comes from filling a cavity that already has a water ingress or exposure problem, which is exactly what the survey checks for before we quote.

Get a quote for your home

Every quote is tailored to your property and confirmed in writing. The €100 measuring visit is deducted in full from your invoice when you place an order.

Request a Free Quote