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.

External wall insulation installers in Galway

105 companies on the SEAI register are based in or serve Galway for external wall insulation (register as of 8 September 2026).

A terrace of single-storey homes under scaffolding and pink debris netting, the roof stripped back. — Garrick Close, Kingston upon Hull: bungalow renovations, September 2023 · Hullian111 · CC BY-SA 4.0 · Photo credits

Based in Galway

11 of them. Sorted by what they are registered for, then by name — this is not an order of merit.

Century Retrofit Ltd
Attic insulationExternal wall insulationInternal wall insulation
Based in Galway · serves Leinster, Munster and Connacht · SEAI no. 17797
Based in Galway.
Connacht/Galway External Insulation Ltd
External wall insulation
Based in Galway · serves Connacht · SEAI no. 17515
Based in Galway.
CW Xterior Solutions Ltd
Attic insulationExternal wall insulationHeating controlsInternal wall insulation
Nationwide · SEAI no. 15497
Based in Galway.
Declan Fahy Plastering LTD
External wall insulationInternal wall insulation
Based in Galway · serves Leinster, Munster and Connacht · SEAI no. 15962
Based in Galway.
McCaher Construction Ltd.
Attic insulationExternal wall insulationInternal wall insulation
Nationwide · SEAI no. 17571
Based in Galway.
Nrr Renovations Limited
Attic insulationExternal wall insulationInternal wall insulationWindow and door
Based in Galway · serves Connacht · SEAI no. 20191
Based in Galway.
OCI Insulation
Attic insulationCavity wall insulationExternal wall insulationInternal wall insulation
Based in Galway · serves Connacht · SEAI no. 16611
Based in Galway.
Professional Solid Insulation
External wall insulationInternal wall insulationWindow and door
Based in Galway · serves Dublin, Leinster and Connacht · SEAI no. 18232
Based in Galway.
Raphael Murray Plastering & EWI
External wall insulationInternal wall insulation
Based in Galway · serves Connacht · SEAI no. 17976
Based in Galway.
Solid Insulation Systems Ireland Ltd
Attic insulationExternal wall insulationInternal wall insulationWindow and door
Nationwide · SEAI no. 15485
Based in Galway.
Steve Moylan Limited
Attic insulationExternal wall insulationInternal wall insulation
Based in Galway · serves Connacht · SEAI no. 17909
Based in Galway.

Also cover Galway from elsewhere (94)

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 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) · Absolute Acrylics Ltd · Algricris Construction Ltd · Anthony Coughlan Heating & Plumbing TA C&S Construction Services · AP Building Contractors Ltd · Ap Eco Building & Renovation · AR Plastering Ltd · Ballinderry Developments Ltd T/A Rebuild · Brusna Energy Solutions Ltd · Ciocan Construction Ltd · CJH Construction · Cornacloy Construction Ltd · Costello Insulation LTD · Damien Ryan Contracts Ltd · David Flaherty Construction LTD · DC Energy Solutions · Decarb Contracts Ltd · Derchil Limited t/a CosiHomes · DMT Renewables Ltd · Dromahair Tully Construction Ltd · Ds Fallon · Dublin All Trades Building Services · Duey Brothers Ltd · Eco Pro Insulation · Eco Smart External Insulation Ltd · Eco Thermal Homes · Ecowrap · Energy Retrofit Ireland · External Insulation Plastering Ltd · Finlay EcoFit Tullamore Ltd · Floelen Construction Ltd · G.V.Services Limited · Gmg Contracts Ltd · Grainger Energy Solutions Ltd · Green - Lux Construction Ltd · Green Air Technologies Ltd · Hamkel Holdings Ltd / Soltherm · Harrington Insulations Limited · Home Building Solutions T/A HBS Elegant build Ltd · Homergy Ltd T/AComfort Solutions Retrofit · Inline Construction and Custom Carpentry Ltd · Insulate Ireland · Jacob Insulation Limited · John Doohan and Company Ltd · Johnathan Timoney T/A Rendpro Ltd · Kilmallock Developments Ltd · Kilsarn Warmer Homes · Leitrim Warmer Homes CLG · Madden Developments Ltd · Marcus Turner · McMorrow Renewables Limited · Metro Insulation Ltd · Moran Retrofit Solutions · MS Plastering Contractor · National Retrofit & Construction Services Ltd · Novin Consultants Ltd · Pa Home Renovations · Paddy Kilduff and Sons Builders Ltd TA Kilduff Con · Pentico Contracting Ltd · Peter Brereton Plastering · Philip Reynolds · Proconstruct Limited · Raphael Considine Construction · Rend Master Ltd · RMC Ecobuild Ltd · Rmn Developments Ltd · SBN Solid Home Ltd · Sean Paul Construction Ltd · Solaregy T/A Sola · Sovereign Finishes Limited · Spreadwell Construction Ltd · Superior Insulations Ltd · Tirconaill Contracts Ltd T/A Mc Taggart Insulation · TLI Group Ltd T/A Transmission Links Ireland Ltd · Tomasz Rulak T/A Tombet Building · Walter Moran Insulation · Winters Construction

What it costs, and what the grant pays

The grant for a semi-detached house is €6,000. SEAI recorded a middle price of €23,247 for this work last year, which leaves about €17,247 for you to pay. These are national figures, not Galway ones — SEAI does not publish prices by county.

What it costs on a home like yours, and what you are left paying

Before you sign

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

Ask up to five of them

Fill in one form, tick who you want to hear from, and we pass your details to those companies and nobody else. It costs nothing and you are under no obligation.

Get external wall insulation quotes in Galway

Common questions

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.

Other work in Galway

Listed on SEAI’s public registers on 8 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.