Wall Insulation Guides for Irish Homeowners
Plain-English guides to every insulation type, SEAI grants and 2026 costs — everything you need before you pick up the phone.
Most popularInsulation typeCavity Wall Insulation
How it works, costs, the SEAI grant of €1,700 and whether your home qualifies.
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Highest grantInsulation typeExternal Wall Insulation
EWI boards, render finishes, 2026 costs and up to €8,000 in SEAI grants.
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Insulation typeDry-Lining Insulation
Insulating from the inside — ideal for solid-wall homes where external work is not possible.
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Insulation typeRoof and Attic Insulation
Up to 25% of home heat escapes through the roof. SEAI grants of up to €3,000.
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Insulation typeFloor Insulation
Suspended timber or solid concrete — how floor insulation works and the €3,500 SEAI grant.
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Start hereGrants and costsHow to Apply for an SEAI Grant
Step-by-step: how to register, pick a contractor and claim your Better Energy Homes grant.
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Grants and costsWall Insulation Costs in Ireland
2026 Irish prices for cavity wall, EWI and dry-lining, before and after SEAI grant.
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ComparisonCavity Wall vs External Wall Insulation
Which type suits your home? A plain-English comparison of both options.
Read guide →Ready to find a contractor?
Browse SEAI-approved wall insulation contractors across all 26 counties. If your project also involves electrical work or a heat pump, find a RECI-registered electrician for that part of the job.