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.
Highest grantInsulation typeExternal Wall Insulation
EWI boards, render finishes, 2026 costs and up to €8,000 in SEAI grants.
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Where to startGrants and costsSEAI Home Energy Upgrades: Where to Start
The full retrofit journey in order, from insulation to heat pump and solar, and which SEAI grant covers each step.
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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.
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ComparisonInsulation Materials Compared
EPS, PIR, mineral wool and bonded bead: what each is for, how thick it needs to be, and where a cheaper board costs you space.
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Before you sellGrants and costsBER Ratings and Insulation
How a BER works, what insulating typically moves it by, and why the rating decides which SEAI schemes you can reach.
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Read firstComparisonDamp, Mould and Insulation
Three kinds of damp, and insulation only cures one. How to tell them apart before you insulate over a problem.
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Before you signGrants and costsChoosing an Insulation Contractor
What a real quote contains, the questions worth asking, and the things that should stop you signing.
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Check firstGrants and costsPlanning Permission for Insulation
Most insulation needs no permission. The exceptions are protected structures, conservation areas and the front of the house.
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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.