Our insulation prices
Clear, up-front pricing for attic and cavity wall insulation. Your SEAI grant comes off these prices — use the calculator to see your net cost. All prices are subject to a site survey.
Attic / roof insulation
| Property | Price (before grant) |
|---|---|
| 2-bed mid / end of terrace | €2,150 |
| 3-bed mid / end of terrace | €2,650 |
| 4-bed mid / end of terrace | €2,950 |
| Bungalow / dormer bungalow | Site visit required |
- 300mm fibreglass quilt
- Insulate water tank & pipes
- Insulate attic trap door
Subject to site survey; may require additional ventilation. Your SEAI grant is deducted from these prices — see the calculator for your net cost.
Cavity wall insulation
| Property | Price (before grant) |
|---|---|
| Ground-floor apartment | €1,250 |
| 2-bed mid terrace | €1,750 |
| 3-bed mid / end of terrace | €2,950 |
| 4-bed mid / end of terrace | €3,250 |
Subject to site survey in accordance with the NSAI Agrément Certificate; may require additional ventilation. Your SEAI grant is deducted from these prices — see the calculator for your net cost.
SEAI grants deducted from these prices
| Measure | Detached | Semi-detached | End of terrace | Mid-terrace | Apartment |
|---|---|---|---|---|---|
| Attic Insulation | €2,000 | €1,500 | €1,500 | €1,400 | €1,100 |
| Cavity Wall Insulation | €1,800 | €1,300 | €1,300 | €850 | €700 |
Enhanced amounts (first-time buyer / qualifying welfare) are higher than the standard grants shown. Indicative SEAI grant amounts, correct as of 2026. Your home must generally have been built and occupied before 31 December 2010, with work by an SEAI-registered contractor. Confirm current grants at seai.ie.
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