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 Limerick?

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 Limerick 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.

Internal wall insulation installers in Limerick

332 companies on the SEAI register are based in or serve Limerick for internal wall insulation (register as of 8 September 2026).

Insulation boards fixed to the outside walls of a terrace mid-job, meter boxes hanging clear of the wall. — Garrick Close, Kingston upon Hull: bungalow renovations, November 2023 · Hullian111 · CC BY-SA 4.0 · Photo credits

Based in Limerick

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

Aerofill Insulation
Attic insulationExternal wall insulationInternal wall insulation
Based in Limerick · serves Munster · SEAI no. 15043
Based in Limerick.
Alc Construction Limited
Attic insulationInternal wall insulation
Based in Limerick · serves Dublin and Munster · SEAI no. 17916
Based in Limerick.
Behan Builders Shanagolden Ltd.
Attic insulationInternal wall insulation
Based in Limerick · serves Munster · SEAI no. 17665
Based in Limerick.
Caherass Plastering Ltd
Internal wall insulation
Based in Limerick · serves Munster and Connacht · SEAI no. 18000
Based in Limerick.
Con Horgan & Sons Ltd T/A Horgan Renewables
Attic insulationHeat pumpInternal wall insulation
Based in Limerick · serves Munster · SEAI no. 11250
Based in Limerick.
Connolly Building & Renovations Ltd
Attic insulationInternal wall insulation
Based in Limerick · serves Munster · SEAI no. 16655
Based in Limerick.
Cosyfill Insulation
Attic insulationCavity wall insulationExternal wall insulationInternal wall insulation
Based in Limerick · serves Munster · SEAI no. 14840
Based in Limerick.
Eugene Brouder
Attic insulationInternal wall insulation
Based in Limerick · serves Munster · SEAI no. 15005
Based in Limerick.
Fmk Developments
Attic insulationInternal wall insulation
Based in Limerick · and 11 other counties · SEAI no. 18288
Based in Limerick.
Foster Construction
Attic insulationInternal wall insulation
Based in Limerick · serves Munster · SEAI no. 10127
Based in Limerick.
JJ Carr Construction Ltd
Internal wall insulation
Based in Limerick · serves Munster · SEAI no. 18301
Based in Limerick.
John Ryan Premier Construction Ltd
Attic insulationInternal wall insulation
Based in Limerick · serves Munster · SEAI no. 20089
Based in Limerick.
M & K Interiors Ltd
Attic insulationInternal wall insulation
Based in Limerick · serves Munster · SEAI no. 15863
Based in Limerick.
Madden Developments Ltd
Attic insulationExternal wall insulationInternal wall insulation
Nationwide · SEAI no. 15502
Based in Limerick.
Neil Hogan Building Contractor
Attic insulationInternal wall insulation
Based in Limerick · serves Munster · SEAI no. 20195
Based in Limerick.
RMC Ecobuild Ltd
Attic insulationExternal wall insulationHeating controlsInternal wall insulation
Based in Limerick · serves Munster and Connacht · SEAI no. 16013
Based in Limerick.
Spreadwell Construction Ltd
Cavity wall insulationExternal wall insulationInternal wall insulation
Based in Limerick · serves Dublin, Leinster, Munster and Connacht · SEAI no. 10746
Based in Limerick.
The Best Insulation
Attic insulationExternal wall insulationInternal wall insulation
Based in Limerick · serves Leinster and Munster · SEAI no. 15097
Based in Limerick.
Tommy Allen
Internal wall insulationWindow and door
Based in Limerick · serves Munster · SEAI no. 20130
Based in Limerick.

Also cover Limerick from elsewhere (313)

These told SEAI they cover the province Limerick 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) · Breffni Insulation Ltd (OSS) · CBM Munster Construction T/A Home Energy Retrofits (OSS) · Churchfield Home Services (OSS) · Electric Ireland Superhomes (OSS) · Energlaze Home Energy Upgrades (OSS) · Energyfix (OSS) · Energywise Ireland (OSS) · Envirobead Ltd. (OSS) · Greenwatt Ltd (OSS) · House 2 Home Retrofit Ltd (OSS) · Kilgobbin Castle Holdings Ltd t/a Insulex (OSS) · Kingdom Installation Ltd (OSS) · Kingspan Insulation Ltd (OSS) · Kore Retrofit Ltd (OSS) · Leetherm Project Management Ltd (OSS) · Moston Construction Ltd (OSS) · Munster External Wall Insulation T/A SE Systems (OSS) · OHK Energy LTD (OSS) · Retrofit Design Ltd (OSS) · Retrofit Energy Ireland (OSS) · SSE Airtricity Energy Services Ltd (OSS) · AB Teague Enterprises Ltd · Ability Contracting Ltd · Absolute Acrylics Ltd · AGI Construction Ltd · Aidan Mccarthy Construction Ltd · Airpacks T/A Kore Insulation · AL Plastering & Building Contractor · Alan Murphy Construction Ltd T/A AM Construction · All In Insulation · All Weather Insulation · Allied Irish Property Ltd · Alpha Insulation Ltd T/A Western Insulation · Annex Building Renovation Ltd · Anthony Coughlan Heating & Plumbing TA C&S Construction Services · Anthony Morahan Plumbing & Heating Ltd · Ap Eco Building & Renovation · Apex Engineering · Auro Naes Ltd T/A Roesavin Construction · B & T External Insulation & Plastering Ltd · Ballinamintra Building Services Ltd · Ballinderry Developments Ltd T/A Rebuild · Ballyhogan Plumbing Services Ltd · Bd Partitions + Ceilings Ltd · BK Modern Build Ltd · BR Insulation t/u Robert O'Brien & Son Ltd · Brendan Maher & Sons Construction Ltd · Brendan Moloney Carpentry · Brendan Shanahan · Brian Foley Construction Ltd · Brian Healy Carpentry Ltd T/A Healy Construction · Brian Smith Heating & Plumbing Ltd · Bromur Energy Ltd · Brosnan Plastering & Insulation Systems Ltd · Budget Renovations · Byrne & Byrne Construction · C & B Cormican Building Contractors Ltd · C & E Fitzgerald Builders · C&H Building Contractors Limited · C&Y Renovations Ltd · CA Energy Ltd · Cadogan Construction · Carew Construction Ltd · Carlow Insulation Solutions · Carrigbel Construction Ltd · Cellulose Insulation Ltd · Century Retrofit Ltd · Christopher Doona Heating & Plumbing Contractor · Ciocan Construction Ltd · CK Energy Management Solutions (EMS) Ltd t/a ENCON · Clar ICH Ltd · Clare Insulation · Clifford Roofing And Contracting Ltd · Clioma House Ltd · Colm And Michael Dunne · Conneally Painting & Sons Trading As Conneally Group · Connole Construction Ltd · Conor Phelan Construction Ltd · Coolim Construction Ltd · Coolyduff Construction Ltd · Corrib View Construction Ltd · Culmc Constructiuon LTD TA JMC Construction · CW Xterior Solutions Ltd · D Dwyer Builders Ltd · D&E External Insulation Ltd · Dalmoy Limited · Dalvac Systems Limited · Damien Ryan Contracts Ltd · Dave Fitzgerald Contracts Ltd · David Doyle Construction Limited · David Flaherty Construction LTD · David O'Flynn Construction T/A Petram Construction · David O'Sullivan · Db Carpentry · DC Energy Solutions · De Courcy'S Bridge Ltd · Declan Buggy LTD · Declan Fahy Plastering LTD · Deep Retrofit Ltd · Derchil Limited t/a CosiHomes · Derek Curtin Ltd. · DJH INSULATION LTD · DKS Construction Ltd · Dncf · Donal A O'Brien Building Ltd · Doyle Construction Cork · Dublin All Trades Building Services · Duey Brothers Ltd · Dunmanus Construction Ltd · Dunne Drylining Ltd · Dunurtaigh Construction Ltd · Eco Home Insulation · Eco Pro Insulation · Eco Smart External Insulation Ltd · Eco Thermal Homes · Ecosy Better Homes Ltd · Ecowise Insulation Ltd · Ecowrap · Edward Eccleston · Eirgreen · Eitas · EJP Concrete Structures Ltd · Elem Construction Ltd T/A Inish Contracts · Elitetherm · Energy Retrofit Ireland · Energywise Savings Ireland Ltd · Evertherm Ltd T/A Annalee Energy Ltd · Finbarr McMahon Carpentry/Construction · Finlay EcoFit Tullamore Ltd · Finloc Renovations Ltd T/A Finloc Construction · Fitzpatrick Plumbing & Heating Contractors Ltd · Floelen Construction Ltd · Forma Design & Build Ltd · G & S Construction & Plant Hire Limited · G.V.Services Limited · Garry McCarthy Construction Ltd · GjMurray ConstructionT/AFrank Murray Construction · Glen Construction Design Ltd · Goleen Developments Ltd · Goode Energy · Grainger Energy Solutions Ltd · Grangebarry Construction Ltd · Green Air Technologies Ltd · Grouville Developments Ltd · Hamkel Holdings Ltd / Soltherm · Harrington Hbrs Ltd · Harrington Insulations Limited · Harry Twomey Plastering · Heffernan Brothers Contractors HBC Ltd · Hennessy Carpentry Services · Henry Connolly Builder Ltd. · Home Building Solutions T/A HBS Elegant build Ltd · Home Works Insulation · Hughes and Co External Insulation · Inglotherm Ltd · Innovate Insulation Ltd · Insulate Ireland · IRD Duhallow · J Shaw Carpentry Ltd · J.D. Buckley Construction Ltd · J&C McMahon · J&J Plastering · Jacob Insulation Limited · Jason Connellan Construction Ltd · JBS Construction Ltd · Jf Fordham Construction Ltd · Jm Energy Savings Limited · Joe Dunican Plumbing And Heating Ltd · John O'Loughlin & Son Ltd · John Ryan Construction Ltd. · John Somers Construction Ltd · John Taylor Construction Ltd · Jon O 'Neill Construction Limited · K K Home & Building Services Ltd · K&D Developments (Sligo) Ltd. · Kanto Property Services · Kelly Insulation Heating & Plumbing · Kereen Building Services · Kesel Construction Ltd · Kg Future Homes Limited · Kh Energy Services Limited · Kieran Walsh Building & Plastering Ltd · Kilmallock Developments Ltd · Kilrehill Bros · Kingscourt Insulation Ltd · Kirrane Engineering Limited · L P M Contracting Ltd · Labcon Building And Civil Engineering Limited · LDS INTERIORS LTD · Leetherm Insulation Ltd. · Leitrim Warmer Homes CLG · LF Building Services T/A Fennery construction ltd · Liam Hokey · M Fox & WM O'Rourke Construction Ltd · M-G Construction Services · M&W Fire Solutions Ltd · Magical Reconstruction Ltd · MAK Building Services Ltd · Maplewood Property Services · Markaye Contracts Ltd · Matthew Rice T/A Mattie Rice Carpentry · McCaher Construction Ltd. · McInerney and Keane Insulation · Measure 2 Build Ltd · Metro Utilities Ltd T/A Metro Developments · Michael Considine · Michael Murphy Construction · Michael Ormond Ltd · Midland Warmer Homes Company Limited · Mike Sugrue Building Contractors · MJ O'Doherty Ltd · Mjkhomes Galway Ltd · Momentum Construction LTD · Monanore Construction Ltd · MS Plastering Contractor · Muggivan Brothers Construction Ltd · Multi Corp Construction Services Ltd · Mulway Construction Limited · Nc Carpentry & Construction Ltd · NCE Insulation T/A Secure and Fix It Enterprises · Ned Grant and Sons · Nexgen Developments LTD · Nexus Building & Civil Engineering Ltd · Niatara Construction Ta Apollo Insulation · Noel Hennessy Construction Ltd · Noel Leahy Carpentry & Building Services Limited · O Leary Insulation · O Mahony Renewable Solutions Ltd · O'Loughlin Construction · Ocon Plastering Ltd · Odl Homes Ltd · Ora Timber Frame · Oriel Insulations · OS Insulate Ltd · P&T Complete Renovations Ltd · Paddy Kilduff and Sons Builders Ltd TA Kilduff Con · Parker Construction Ltd · Pat Dineen T/A Hamilton French · Pat Enright Glass And Glazing Ltd · Pat F Murphy · Pat Loftus Construction Ltd · Patrick Sheehan Construction · Paudie Sheehy · Peter Brereton Plastering · Phelan Construction · Philly Burke Carpentry, Painting & Building · Poly Coating and Sealing Ltd · Pouldoon Construction Ltd · PPGIH Business Ltd t/a Premier Irish Homes · Premier Insulations · Primabuild Ltd · Pro Walls Ltd · Probuild Building Services Ltd · Quilter Insulation · Raphael Considine Construction · Redfern Construction Ltd · Reflat Insulation Ltd · Reidy Plastering and Insulation Contractors · Rend Master Ltd · Renova · Renual Construction Limited · Retrofit Energy Ireland One Stop Shop Ltd · Richard Harte Building & Plastering Services Ltd · Richard Mc Mahon & Warmer Homes · Rio Ents Ltd ta A-Rate · Riverbank JC Holdings Ltd · RS Construction · Ryan Spray Foam · SBN Solid Home Ltd · SCMS Mechanical Services Ltd · Scott Shellard Construction Limited · Seamus Ryan Roofing Ltd · Sean Fitzgerald Ceilings & Partitions Ltd · Sean Lilley Construction Limited · Sigma Homes Ltd · Sloane Plastering LTD · SLP Westport · SMB Construction · Smyth Project Management Ltd. T/A Teknabuild · Solaregy T/A Sola · Solaris Green Energy · Solid Insulation Systems Ireland Ltd · Sovereign Finishes Limited · Stephen Doherty · Stephen Mc Grath · Stephen Murphy Plumbing & Heating Ltd · Stone Arches LTD T/A Waterford Insulation · Superior Insulations Ltd · Sustainable Warmth Ltd · T & A Plant Hire · T Insulations · Tallis And Co Ltd · Tamburah Limited · Thermo Renewables Limited · Thomas O Connor · Tim O'Leary Spray Foam Ltd · Timahoe Construction T/A Leinster Property Service · Tirconaill Contracts Ltd T/A Mc Taggart Insulation · Titan Homes Ltd · TLI Group Ltd T/A Transmission Links Ireland Ltd · TMC Construction · Tomasz Rulak T/A Tombet Building · Tony McKeon Carpentry & Building Services · Treacon Carpentry & Building Services Ltd · Trevor Kelliher Constuction · Verde Remediation Services Ltd · Vincent Bergin & Sons Limited · Vinro Ltd · Wall 2 Wall Construction · Weglarz Construction

What it costs, and what the grant pays

The grant for a semi-detached house is €3,500. SEAI recorded a middle price of €10,420 for this work last year, which leaves about €6,920 for you to pay. These are national figures, not Limerick 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 internal wall insulation quotes in Limerick

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 Limerick?: 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 Limerick 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 Limerick

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.