Wall insulation guides & prices
Every SEAI wall insulation grant guide, cost comparison, dry-lining breakdown, suitability check and county reference on one page.
Compare cavity, internal and external wall grants and check what your home qualifies for.
Free, no obligation. One SEAI-registered contractor prices it, not five.
- €8,000external wall grant for a detached house
- €4,500internal (dry lining), detached
- €1,800cavity fill, detached
- 24%of older homes have solid or hollow block walls
Read the guides
- Wall insulation grant amounts 2026All three wall grants, the higher cavity rate and what changed in 2026.
- Wall insulation cost after the grantSEAI's median cost for each wall job, before and after the grant.
- Internal wall insulation (dry lining)Dry lining: the grant, the cost, the room you lose and the rules.
- Internal vs external insulationSame solid wall, two jobs: grant, cost, planning and disruption.
- Which wall insulation does my house need?Cavity, solid, hollow block or timber frame: which grant fits.
- Insulating one room or one wallThe all-walls rule, and what it means for one room or one gable.
- Old, solid and stone wallsPre-1940, stone and protected houses: what to check first.
- How to applySeven steps, the deadlines, and the rule that loses people the grant.
- Free wall insulationThe Warmer Homes Scheme: who gets walls done for nothing, and the wait.
- All home insulation grantsAttic and all three wall grants in one table.
- Wall insulation FAQDirect answers on all three SEAI wall grants, costs and eligibility.
- Technical & grant glossary (A–Z)Plain-English definitions of U-values, dry lining, ETICS and MPRN.
- All 26 counties coveredCounty-by-county BER wall types, solid vs cavity shares and wall areas.
Your wall grant and what's left to pay
Three taps: the wall job, your home, and which rate fits you. The answer is SEAI's fixed grant and its own median cost for the job.
Your SEAI wall insulation grant
€3,500
- SEAI median cost, Jan to Jun 2026
- €9,843
- Left to pay at the median
- €6,343
SEAI's fixed internal (dry lining) grant for a semi-d or end of terrace at the standard rate is €3,500. SEAI's median cost for that job on a semi-d or end of terrace, January to June 2026, was €9,843. €9,843 less €3,500 leaves about €6,343. Our sum; your quote can be higher or lower.
Send this for a real priceHow this is worked out
The grant is SEAI's fixed amount for that wall job and home type, as SEAI's wall insulation page and Citizens Information list it. The higher rate applies to cavity walls only. The median cost is SEAI's own figure from grant-funded jobs completed between January and June 2026; the PDF doesn't say whether VAT is in. Left to pay is the median less the grant, our sum. The home must have been built and lived in before 2011, every external wall must be done, the contractor must be on SEAI's register, and SEAI must approve the grant before work starts. It's an estimate, never a quote.
Your wall grant and a price, in 4 taps
Tap your home, which wall job you think it needs, when it was built and which rate fits you. Then leave your number and one SEAI-registered insulation contractor who covers your area rings you to look at the walls and price it in writing.
Every guide, calculator and county page
Jump straight to any specification guide, our interactive calculator, the technical glossary or your county page.
Price & Specification Guides
Calculator, FAQ & Glossary
Related 2026 Ireland Specialist Cost & Technical Guides
Cross-referenced Irish pricing benchmarks, SEAI/Revenue grant rules, and county specifications from partner reference hubs:
- External Insulation Grant (externalinsulationgrant.ie) — 2026 Ireland Cost & Spec Guides: The SEAI external wall insulation grant (EUR 8,000 detached, 6,000 semi-D or end of terrace, 3,500 mid-terrace, 3,000 apartment) against the visitor's
- Midland Insulation (midlandinsulation.ie) — 2026 Ireland Cost & Spec Guides: Home insulation and SEAI insulation grants across the Irish Midlands (Laois, Offaly, Westmeath, Longford, Roscommon, Kildare, Tipperary and Meath) and
- Window Grants (windowgrants.ie) — 2026 Ireland Cost & Spec Guides: Guide to the SEAI windows and doors grant in Ireland (opened 2 March 2026): amounts by house type, eligibility including the BER Heat Loss Indicator,
- Windows Grant (windowsgrant.ie) — 2026 Ireland Cost & Spec Guides: Getting an Irish home ready for the SEAI windows and doors grant (windows EUR 4,000 detached, 3,000 semi-D or end of terrace, 1,800 mid-terrace, 1,500
- House Wrap (housewrap.ie) — 2026 Ireland Cost & Spec Guides: House wrap (external wall insulation) in Ireland: the SEAI grant by house type (€8,000 detached to €3,000 apartment), costs before and after the grant