PRICE GUIDE · TRADES & CONSTRUCTION · 2026–2027
Cavity Wall Insulation cost in Ireland
€700–€1,800 per job. Typically €1,200.
A cavity wall insulation in Ireland costs €700–€1,800 per job, typically around €1,200. The price is set by property size (m² of wall), cavity condition/width and fill material.
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HOW MUCH IT COSTS
How much does cavity wall insulation cost in Ireland?
| Low end | €700 | a simple job, off-peak, outside the cities |
|---|---|---|
| Typical | €1,200 | what most people pay |
| High end | €1,800 | the biggest jobs, short notice, Dublin |
Locufy guide prices for 2026–2027. Updated 2026. A national range, not a quote — enter your town above for real prices from the builders and trades near you.
What moves the price
- Size of the property — a larger house has more wall area to drill and fill, so it needs more insulation material.
- Type of insulation material chosen — beads, mineral wool and foam differ in price for the same area of wall.
- Any necessary repairs to the walls — cracked render or damaged pointing has to be fixed before the cavity can be filled.
- Cavity condition and width — a narrow cavity or rubble inside it needs checking and clearing before the insulation goes in.
Services for the maintenance and repair of the dwelling prices in Ireland are up 23% over five years (CSO Consumer Price Index, Services for the maintenance and repair of the dwelling, to 2025 December). Five years ago a typical cavity wall insulation would have cost about €970 — an estimate from today's guide price and that index, not a recorded price. Source: CSO CPM18, CPM12 →
WHAT YOU GET
What a cavity wall insulation booking includes
Takes: Typically, the installation of cavity wall insulation can be completed in a day for an average-sized home.. Not included: Cavity wall insulation does not cover repairs to existing structural damage or issues such as damp proofing.
WHAT PEOPLE BOOK
Common cavity wall insulation jobs
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Cavity Wall Insulation near you, with prices shown
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How to pay less
- You can ask the installer whether a home energy grant applies to cavity wall insulation, which can bring down the cost of the work.
- You can ask whether the installer also does attic insulation, as booking both together can save a second call-out.
- Clearing access along the outside walls, such as moving bins and cutting back plants, saves the insulation installer time on the day.
- You can ask the installer to compare fill materials, as the cheaper insulation may suit a standard cavity just as well.
Before you book
- Access to areas where insulation will be installed, including exterior walls.
- Information about any existing damp issues or structural concerns.
- Details of your property's energy performance history for tailored advice.
- Ask the installer what experience they have with houses of your age and wall type.
- Ask which fill material the installer plans to use and whether it suits the width of your cavity.
- Agree how the drill holes in the outer wall will be filled and matched to the existing finish after the insulation.
- You can ask whether the installer is qualified in cavity wall insulation and whether the fill material meets current building standards.
Cavity Wall Insulation cost: questions people ask
The cost can vary based on the size of the property, the type of insulation material chosen, and any necessary repairs to the walls. Accessibility and the complexity of the installation may also affect pricing.
Typically, the installation of cavity wall insulation can be completed in a day for an average-sized home. However, larger properties or those requiring extensive repairs may take longer.
While general insulation professionals can perform cavity wall insulation, hiring a qualified specialist ensures compliance with building regulations and standards. This is particularly important if structural work is involved.
Emergency services for cavity wall insulation are rare, as the process requires planning and assessment. However, some contractors may offer expedited services depending on their availability.
Yes, many contractors offer package deals for multiple services such as insulation, draught-proofing, or energy efficiency audits. This can often lead to cost savings.
Cavity wall insulation does not cover repairs to existing structural damage or issues such as damp proofing. These should be addressed separately to ensure proper insulation performance.