Do I have to use one of these companies to get the grant?

Yes. SEAI only pays a grant on work done by a company on its register, and the company claims it on your behalf. Work done by anyone else is not covered, however good it is.

How many quotes should I get in Galway?

Three, from companies registered for the same job, and ask each for a written breakdown. Quotes for the same house often differ by thousands because they include different work, not because one is dearer.

Is this list in any order of merit?

No. Companies based in Galway come first, then the ones that travel to it, then One Stop Shops, then alphabetical. Being on the register means the paperwork is in order, not that the work is good.

Cavity wall insulation installers in Galway

74 companies on SEAI's register say they do cavity wall insulation in Galway. Only work by a registered company gets the SEAI grant.

8 are based in Galway; the other 66 cover it from elsewhere.
The grant for a semi-detached house is €1,300. SEAI’s middle price last year was €1,585.
Get SEAI’s grant approval before any work starts. SEAI does not pay for work that began first.
Get three written quotes for the same job. This list is not a ranking.

A ribbed insulation hose plugged into a drilled hole in an ivy-covered red-brick house wall, with a second drilled hole visible to the right and a ladder at the edge of the frame. — Insulation blown into a cavity wall through drilled holes. Photographed in the UK.
Cavity wall isulation · Workworkwembley · CC BY-SA 4.0

See your grants for wall insulation, and what you’d pay

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Based in Galway

8 of them, from SEAI's register (read 25 September 2026). Not an order of merit. Published figure

Alpha Insulation Ltd T/A Western InsulationAttic insulationCavity wall insulationExternal wall insulationInternal wall insulationBased in Galway · serves Munster and Connacht · SEAI no. 10737Based in Galway.
Corrib View Construction LtdAttic insulationCavity wall insulationInternal wall insulationBased in Galway · serves Munster and Connacht · SEAI no. 16674Based in Galway.
Ecowise Insulation LtdAttic insulationCavity wall insulationInternal wall insulationNationwide · SEAI no. 10080Based in Galway.
Fahy Insulations LtdAttic insulationCavity wall insulationInternal wall insulationBased in Galway · serves Connacht · SEAI no. 10409Based in Galway.
Mardoc Holdings LimitedAttic insulationCavity wall insulationInternal wall insulationBased in Galway · serves Dublin, Leinster, Munster and Connacht · SEAI no. 10311Based in Galway.
OCI InsulationAttic insulationCavity wall insulationExternal wall insulationInternal wall insulationBased in Galway · serves Connacht · SEAI no. 16611Based in Galway.
PNA insulation Ltd T/A O'Loghlen Insulation LtdAttic insulationCavity wall insulationBased in Galway · serves Munster and Connacht · SEAI no. 10032Based in Galway.
West Coast Insulations LtdAttic insulationCavity wall insulationBased in Galway · serves Connacht · SEAI no. 13650Based in Galway.

Also cover Galway from elsewhere (66)

These told SEAI they cover the province Galway is in, or listed it among the counties they serve. Ask how far they travel before you go any further. Names only here; each one’s full register row is on its own county’s page. OSS = One Stop Shop.

Ashgrove Engineering Ltd T/A Ashgrove Renewables (OSS) · Bayview Contracts Ltd (OSS) · Bord Gais Energy Ltd (OSS) · Churchfield Home Services (OSS) · Cooper Insulation Ltd. (OSS) · Electric Ireland Superhomes (OSS) · Energyfix (OSS) · Envirobead Ltd. (OSS) · Greenwatt Ltd (OSS) · House 2 Home Retrofit Ltd (OSS) · Kingdom Installation Ltd (OSS) · Kingspan Insulation Ltd (OSS) · Kore Retrofit Ltd (OSS) · Moston Construction Ltd (OSS) · OHK Energy LTD (OSS) · Retrofit Design Ltd (OSS) · Retrofit Energy Ireland (OSS) · SSE Airtricity Energy Services Ltd (OSS) · AB Teague Enterprises Ltd · Absolute Insulation Ltd · AC Insulation · Adrian Maguire T/A Abbey Insulation · All In Insulation · Anthony Coughlan Heating & Plumbing TA C&S Construction Services · Ardvark Insulation Ltd · Bio Insulate Ltd · Brusna Energy Solutions Ltd · C.D.M. Contracts Ltd · Clar ICH Ltd · Damien Ryan Contracts Ltd · Derchil Limited t/a CosiHomes · E.C.S.C Insulation Services Ltd · Eco Home Insulation · Ecotec Insulation Ltd · Ecotech Contracts IRI Ltd · Evertherm Ltd T/A Annalee Energy Ltd · Fagan Crossmolina Limited · Finlay EcoFit Tullamore Ltd · Gallen Insulation Ltd · Harrington Insulations Limited · Holmes Insulation LTD · Innovate Insulation Ltd · Instant Eco Homes Ltd · Jacob Insulation Limited · John Doohan and Company Ltd · Kelly Insulation Heating & Plumbing · Kingscourt Insulation Ltd · Leitrim Warmer Homes CLG · McCormack Insulation · McInerney and Keane Insulation · Metro Insulation Ltd · Midland Warmer Homes Company Limited · Moran Retrofit Solutions · National Retrofit & Construction Services Ltd · Noel Holmes Construction Ltd. · OG Insulation Limited · Premier Insulations · Ruane Insulation Ltd T/A Better Energy Solutions · Ryan Spray Foam · Spreadwell Construction Ltd · Superior Insulations Ltd · Sustainable Warmth Ltd · Thermowise Insulations Limited · Tirconaill Contracts Ltd T/A Mc Taggart Insulation · Walter Moran Insulation · Warm 'n Cosy Homes Limited

See your grants and what you’d pay

Four questions about your home, then your numbers. Get quotes from registered contractors if you want them.

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The detail

How Galway compares

Cavity wall insulation installers who say they work in each county, from SEAI's register. Published figure

Figure 1Published figure

74 cavity wall insulation installers say they work in Galway; the median county has 87

Galway is 20th of 26. The most list Kildare (92); the fewest, Donegal (48). 18 One Stop Shops list Galway.

Galway74
The median county87
Most: Kildare92
Fewest: Donegal48

Each bar counts companies on SEAI's register that list the county for cavity wall insulation. Many firms tick a whole province, so counts move in regional steps. A count is choice, not capacity. Registration is paperwork, not a review of their work.

Sources: SEAI home energy, One Stop Shop and solar registers, read 25 Sep 2026

What it costs, and what the grant pays

National figures, not Galway ones: SEAI does not publish prices by county. SEAI rule

On a semi-detached house, SEAI's middle price of €1,585 less the grant leaves €285 to pay.

Before you sign

Four things SEAI tells homeowners to do.

Wait for your grant approval email before any work starts. SEAI does not pay for work that began before it was approved.
Get at least three quotes, and check each one covers the same job. The cheapest quote is often the one that leaves something out.
Check the company is on the register on the day you sign. Companies join and leave it, and this page is a copy taken on one day.
Get it in writing: what is being done, what it costs, when it starts and when it is finished.

How the application works →

Questions people ask

Do I have to use one of these companies to get the grant?: Yes. SEAI only pays a grant on work done by a company on its register, and the company claims it on your behalf. Work done by anyone else is not covered, however good it is.
How many quotes should I get in Galway?: Three, from companies registered for the same job, and ask each for a written breakdown. Quotes for the same house often differ by thousands because they include different work, not because one is dearer.
Is this list in any order of merit?: No. Companies based in Galway come first, then the ones that travel to it, then One Stop Shops, then alphabetical. Being on the register means the paperwork is in order, not that the work is good.

Listed on SEAI’s public registers on 25 September 2026. Being registered is not an endorsement by SEAI or by us. Check the current register on seai.ie before you sign anything. Not affiliated with SEAI. On this list? Get homeowner plans to quote for

Updated 5 October 2026 · grants checked 10 Oct 2026 · register read 25 Sep 2026 · How we know · Corrections