Internal wall insulation installers in Cork
321 companies on SEAI's register say they do internal wall insulation in Cork. Only work by a registered company gets the SEAI grant.
- 62 are based in Cork; the other 259 cover it from elsewhere.
- The grant for a semi-detached house is €3,500. SEAI’s middle price last year was €9,843.
- 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.
Insulation boards fixed to the walls of a terrace mid-job. Photographed in Hull, England.
Garrick Close, Kingston upon Hull: bungalow renovations, November 2023 · Hullian111 · CC BY-SA 4.0
See your grants for wall insulation, and what you’d pay
About 10 seconds. See your numbers first, then get quotes if you want them.
Based in Cork
62 of them, from SEAI's register (read 25 September 2026). Not an order of merit. Published figure
- Ashgrove Engineering Ltd T/A Ashgrove RenewablesOne Stop ShopAttic insulationCavity wall insulationExternal wall insulationHeat pumpHeating controlsInternal wall insulationSolar hot waterSolar panelWindow and doorBased in Cork.
- Envirobead Ltd.One Stop ShopAttic insulationCavity wall insulationExternal wall insulationHeat pumpHeating controlsInternal wall insulationSolar hot waterWindow and doorBased in Cork.
- Kilgobbin Castle Holdings Ltd t/a InsulexOne Stop ShopAttic insulationCavity wall insulationExternal wall insulationHeat pumpHeating controlsInternal wall insulationSolar hot waterWindow and doorBased in Cork.
- Munster External Wall Insulation T/A SE SystemsOne Stop ShopAttic insulationCavity wall insulationExternal wall insulationHeat pumpHeating controlsInternal wall insulationSolar hot waterSolar panelWindow and doorBased in Cork.
- Ability Contracting LtdAttic insulationExternal wall insulationInternal wall insulationBased in Cork.
- Aidan Mccarthy Construction LtdAttic insulationInternal wall insulationBased in Cork.
- Anthony Coughlan Heating & Plumbing TA C&S Construction ServicesAttic insulationCavity wall insulationExternal wall insulationHeat pumpHeating controlsInternal wall insulationSolar hot waterWindow and doorBased in Cork.
- Apex EngineeringAttic insulationHeating controlsInternal wall insulationWindow and doorBased in Cork.
- B & T External Insulation & Plastering LtdAttic insulationExternal wall insulationInternal wall insulationBased in Cork.
- C&Y Renovations LtdAttic insulationInternal wall insulationBased in Cork.
- CA Energy LtdAttic insulationHeat pumpHeating controlsInternal wall insulationSolar hot waterBased in Cork.
- Cadogan ConstructionAttic insulationInternal wall insulationBased in Cork.
- Cellulose Insulation LtdAttic insulationInternal wall insulationBased in Cork.
- Coolim Construction LtdAttic insulationInternal wall insulationBased in Cork.
- Coolyduff Construction LtdAttic insulationInternal wall insulationBased in Cork.
- D Dwyer Builders LtdAttic insulationInternal wall insulationBased in Cork.
- David Doyle Construction LimitedAttic insulationInternal wall insulationBased in Cork.
- David O'Flynn Construction T/A Petram ConstructionAttic insulationInternal wall insulationBased in Cork.
- Deep Retrofit LtdAttic insulationInternal wall insulationWindow and doorBased in Cork.
- Derek Curtin Ltd.Attic insulationInternal wall insulationBased in Cork.
- DKS Construction LtdAttic insulationInternal wall insulationBased in Cork.
- DncfAttic insulationInternal wall insulationBased in Cork.
- Donal A O'Brien Building LtdAttic insulationInternal wall insulationBased in Cork.
- Doyle Construction CorkAttic insulationInternal wall insulationBased in Cork.
- Dunmanus Construction LtdAttic insulationInternal wall insulationBased in Cork.
- Energywise Savings Ireland LtdAttic insulationHeat pumpHeating controlsInternal wall insulationSolar hot waterSolar panelBased in Cork.
- Garry McCarthy Construction LtdAttic insulationInternal wall insulationBased in Cork.
- Goleen Developments LtdAttic insulationInternal wall insulationBased in Cork.
- Grainger Energy Solutions LtdAttic insulationExternal wall insulationInternal wall insulationBased in Cork.
- Grouville Developments LtdAttic insulationInternal wall insulationBased in Cork.
- Heffernan Brothers Contractors HBC LtdAttic insulationExternal wall insulationInternal wall insulationBased in Cork.
- HPC Plasterers Limited T/A Holland InsulationAttic insulationExternal wall insulationInternal wall insulationBased in Cork.
- IRD DuhallowAttic insulationCavity wall insulationInternal wall insulationBased in Cork.
- J.D. Buckley Construction LtdAttic insulationCavity wall insulationExternal wall insulationInternal wall insulationWindow and doorBased in Cork.
- JBS Construction LtdAttic insulationHeat pumpHeating controlsInternal wall insulationSolar hot waterBased in Cork.
- Jm Energy Savings LimitedAttic insulationInternal wall insulationBased in Cork.
- L P M Contracting LtdExternal wall insulationInternal wall insulationBased in Cork.
- M Fox & WM O'Rourke Construction LtdAttic insulationInternal wall insulationBased in Cork.
- MJ O'Doherty LtdAttic insulationInternal wall insulationBased in Cork.
- Momentum Construction LTDAttic insulationInternal wall insulationBased in Cork.
- MS Plastering ContractorAttic insulationExternal wall insulationInternal wall insulationBased in Cork.
- NCE Insulation T/A Secure and Fix It EnterprisesAttic insulationInternal wall insulationBased in Cork.
- Noel Hennessy Construction LtdAttic insulationInternal wall insulationBased in Cork.
- Ocon Plastering LtdAttic insulationInternal wall insulationBased in Cork.
- OS Insulate LtdAttic insulationCavity wall insulationExternal wall insulationInternal wall insulationBased in Cork.
- P&T Complete Renovations LtdAttic insulationExternal wall insulationInternal wall insulationBased in Cork.
- Parker Construction LtdAttic insulationInternal wall insulationBased in Cork.
- Pat Dineen T/A Hamilton FrenchAttic insulationInternal wall insulationBased in Cork.
- Pat Enright Glass And Glazing LtdInternal wall insulationWindow and doorBased in Cork.
- Pat F MurphyAttic insulationHeat pumpHeating controlsInternal wall insulationSolar hot waterBased in Cork.
- Reidy Plastering and Insulation ContractorsInternal wall insulationBased in Cork.
- Riverbank JC Holdings LtdInternal wall insulationBased in Cork.
- Scott Shellard Construction LimitedAttic insulationExternal wall insulationInternal wall insulationBased in Cork.
- Sean Lilley Construction LimitedAttic insulationInternal wall insulationBased in Cork.
- Sigma Homes LtdAttic insulationInternal wall insulationWindow and doorBased in Cork.
- Sloane Plastering LTDExternal wall insulationInternal wall insulationBased in Cork.
- Stephen Mc GrathAttic insulationInternal wall insulationBased in Cork.
- T & A Plant HireAttic insulationHeating controlsInternal wall insulationBased in Cork.
- Titan Homes LtdAttic insulationExternal wall insulationInternal wall insulationBased in Cork.
- Tony McKeon Carpentry & Building ServicesAttic insulationInternal wall insulationBased in Cork.
- Vinro LtdInternal wall insulationBased in Cork.
- Wall 2 Wall ConstructionAttic insulationExternal wall insulationInternal wall insulationBased in Cork.
Also cover Cork from elsewhere (259)
These told SEAI they cover the province Cork 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.
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) · Energywise Ireland (OSS) · Greenwatt Ltd (OSS) · House 2 Home Retrofit Ltd (OSS) · Kingdom Installation Ltd (OSS) · Kingspan Insulation Ltd (OSS) · Kore Retrofit Ltd (OSS) · Leetherm Project Management 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 Acrylics Ltd · Aerofill Insulation · AGI Construction Ltd · Airpacks T/A Kore Insulation · AL Plastering & Building Contractor · Alc Construction Limited · All In Insulation · All Weather Insulation · Allied Irish Property Ltd · Alpha Insulation Ltd T/A Western Insulation · Annex Building Renovation Ltd · Anthony Morahan Plumbing & Heating Ltd · Ap Eco Building & Renovation · Auro Naes Ltd T/A Roesavin Construction · Ballinamintra Building Services Ltd · Ballinderry Developments Ltd T/A Rebuild · Ballyhogan Plumbing Services Ltd · Bd Partitions + Ceilings Ltd · Behan Builders Shanagolden 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&H Building Contractors Limited · Caherass Plastering Ltd · Carew Construction Ltd · Carlow Insulation Solutions · 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 · Colm And Michael Dunne · Comfort Living Limited · Con Horgan & Sons Ltd T/A Horgan Renewables · Conneally Painting & Sons Trading As Conneally Group · Connole Construction Ltd · Connolly Building & Renovations Ltd · Conor Phelan Construction Ltd · Corrib View Construction Ltd · Cosyfill Insulation · Culmc Constructiuon LTD TA JMC Construction · CW Xterior Solutions Ltd · D&E External Insulation Ltd · Dalmoy Limited · Dalvac Systems Limited · Damien Ryan Contracts Ltd · Dave Fitzgerald Contracts Ltd · David Flaherty Construction LTD · David O'Sullivan · Db Carpentry · DC Energy Solutions · De Courcy'S Bridge Ltd · Declan Buggy LTD · Declan Fahy Plastering LTD · Derchil Limited t/a CosiHomes · DJH INSULATION LTD · DSL Construction · Dublin All Trades Building Services · Duey Brothers Ltd · Dunne Drylining Ltd · Eco Home Insulation · Eco Pro Insulation · Eco Smart External Insulation Ltd · Eco Thermal Homes · Ecosy Better Homes Ltd · Ecowise Insulation Ltd · Edward Eccleston · Eirgreen · Eitas · EJP Concrete Structures Ltd · Elem Construction Ltd T/A Inish Contracts · Elitetherm · Energy Retrofit Ireland · Eugene Brouder · Evertherm Ltd T/A Annalee Energy Ltd · Finbarr McMahon Carpentry/Construction · Finlay EcoFit Tullamore Ltd · Finloc Renovations Ltd T/A Finloc Construction · Floelen Construction Ltd · Forma Design & Build Ltd · Foster Construction · GjMurray ConstructionT/AFrank Murray Construction · Glen Construction Design Ltd · Glenwood Preservation Ltd · Goode Energy · Grangebarry Construction Ltd · Green Air Technologies Ltd · Hamkel Holdings Ltd / Soltherm · Harrington Hbrs Ltd · Harrington Insulations Limited · Harry Twomey Plastering · 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 · J Shaw Carpentry Ltd · J&C McMahon · J&J Plastering · Jacob Insulation Limited · Jason Connellan Construction Ltd · Jf Fordham Construction Ltd · JJ Carr Construction Ltd · Joe Dunican Plumbing And Heating Ltd · John O'Loughlin & Son Ltd · John Ryan Construction Ltd. · John Ryan Premier 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 · 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 & K Interiors Ltd · M-G Construction Services · M&W Fire Solutions Ltd · Madden Developments Ltd · MAK Building Services Ltd · Mardoc Holdings Limited · 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 · Mjkhomes Galway Ltd · Monanore Construction Ltd · Muggivan Brothers Construction Ltd · Multi Corp Construction Services Ltd · Mulway Construction Limited · Nc Carpentry & Construction Ltd · Ned Grant and Sons · Neil Hogan Building Contractor · Nexgen Developments LTD · Nexus Building & Civil Engineering Ltd · Noel Leahy Carpentry & Building Services Limited · O Leary Insulation · O Mahony Renewable Solutions Ltd · O'Loughlin Construction · Odl Homes Ltd · Ora Timber Frame · Oriel Insulations · Paddy Kilduff and Sons Builders Ltd TA Kilduff Con · Pat Loftus Construction Ltd · Patrick Sheehan Construction · Paudie Sheehy · 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 · 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 · RMC Ecobuild Ltd · RS Construction · Ryan Spray Foam · Salix Construction Ltd · SBN Solid Home Ltd · SCMS Mechanical Services Ltd · Sean Fitzgerald Ceilings & Partitions Ltd · SLP Westport · SMB Construction · Smyth Project Management Ltd. T/A Teknabuild · Solar Direct Ltd. · Solaregy T/A Sola · Solid Insulation Systems Ireland Ltd · Sovereign Finishes Limited · Spreadwell Construction Ltd · Springridge Construction Ltd · Stephen Doherty · Stephen Murphy Plumbing & Heating Ltd · Stone Arches LTD T/A Waterford Insulation · Superior Insulations Ltd · Sustainable Warmth Ltd · Tallis And Co Ltd · Tamburah Limited · The Best Insulation · 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 · TLI Group Ltd T/A Transmission Links Ireland Ltd · TMC Construction · Tomasz Rulak T/A Tombet Building · Tommy Allen · Treacon Carpentry & Building Services Ltd · Trevor Kelliher Constuction · Verde Remediation Services Ltd · Vincent Bergin & Sons Limited · Weglarz Construction
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.
The detail
How Cork compares
Internal wall insulation installers who say they work in each county, from SEAI's register. Published figure
321 internal wall insulation installers say they work in Cork; the median county has 323
Cork is 16th of 26. The most list Wicklow (462); the fewest, Donegal (196). 23 One Stop Shops list Cork.
Each bar counts companies on SEAI's register that list the county for internal 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 Cork ones: SEAI does not publish prices by county. SEAI rule
On a semi-detached house, SEAI's middle price of €9,843 less the grant leaves €6,343 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.
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 Cork?
- 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 Cork 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 · grants checked · register read 25 Sep 2026 · How we know · Corrections