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 Cavan?

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 Cavan 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 Cavan

200 companies on SEAI's register say they do internal wall insulation in Cavan. Only work by a registered company gets the SEAI grant.

23 are based in Cavan; the other 177 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 outside walls of a terrace mid-job, meter boxes hanging clear of the wall. — 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

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About 10 seconds. See your numbers first, then get quotes if you want them.

Based in Cavan

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

Breffni Insulation LtdOne Stop ShopAttic insulationCavity wall insulationExternal wall insulationHeat pumpHeating controlsInternal wall insulationSolar hot waterWindow and doorBased in Cavan · and 24 other counties · SEAI no. 10013 · WebsiteBased in Cavan.
Greenwatt LtdOne Stop ShopAttic insulationCavity wall insulationExternal wall insulationHeat pumpHeating controlsInternal wall insulationSolar hot waterWindow and doorNationwide · SEAI no. 17045 · WebsiteBased in Cavan.
Abbey View Construction LmitedAttic insulationInternal wall insulationBased in Cavan · serves Leinster, Connacht and Ulster · SEAI no. 18039Based in Cavan.
Airpacks T/A Kore InsulationAttic insulationInternal wall insulationNationwide · SEAI no. 16252Based in Cavan.
Anthony Brady Plumbing LimitedAttic insulationHeat pumpHeating controlsInternal wall insulationSolar hot waterBased in Cavan · serves Dublin, Leinster, Connacht and Ulster · SEAI no. 10257Based in Cavan.
AO Electrical And Solar LtdAttic insulationInternal wall insulationBased in Cavan · serves Dublin, Leinster, Connacht and Ulster · SEAI no. 18335Based in Cavan.
Blackwell Consultancy T/A Blackwell ContractsAttic insulationHeat pumpHeating controlsInternal wall insulationBased in Cavan · serves Dublin, Leinster and Ulster · SEAI no. 16446Based in Cavan.
Cando Engineering LtdAttic insulationInternal wall insulationBased in Cavan · serves Dublin, Leinster and Ulster · SEAI no. 17837Based in Cavan.
Carolan Murphy LtdAttic insulationInternal wall insulationBased in Cavan · serves Leinster and Ulster · SEAI no. 18105Based in Cavan.
Cloonagh Construction LtdAttic insulationInternal wall insulationBased in Cavan · serves Ulster · SEAI no. 12926Based in Cavan.
Decarb Contracts LtdAttic insulationExternal wall insulationInternal wall insulationBased in Cavan · serves Dublin, Leinster, Connacht and Ulster · SEAI no. 17881Based in Cavan.
Edward EcclestonAttic insulationHeating controlsInternal wall insulationNationwide · SEAI no. 13393Based in Cavan.
Evertherm Ltd T/A Annalee Energy LtdAttic insulationCavity wall insulationInternal wall insulationNationwide · SEAI no. 15395Based in Cavan.
Green - Lux Construction LtdAttic insulationExternal wall insulationInternal wall insulationBased in Cavan · serves Dublin, Leinster, Connacht and Ulster · SEAI no. 17819Based in Cavan.
JJR Insulation LtdAttic insulationExternal wall insulationInternal wall insulationWindow and doorBased in Cavan · serves Dublin and Ulster · SEAI no. 17274Based in Cavan.
JMC Wood Design LtdAttic insulationInternal wall insulationBased in Cavan · also Dublin · SEAI no. 16703Based in Cavan.
Kingscourt Insulation LtdAttic insulationCavity wall insulationInternal wall insulationNationwide · SEAI no. 17253Based in Cavan.
McMorrow Renewables LimitedAttic insulationExternal wall insulationInternal wall insulationBased in Cavan · serves Dublin, Leinster, Connacht and Ulster · SEAI no. 17501Based in Cavan.
P Mcgovern & Son Construction LtdAttic insulationInternal wall insulationBased in Cavan · serves Leinster, Connacht and Ulster · SEAI no. 18286Based in Cavan.
Padraig Brady Carpentry LimitedAttic insulationInternal wall insulationBased in Cavan · serves Dublin, Leinster, Connacht and Ulster · SEAI no. 19450Based in Cavan.
Peter McKiernan Construction & EngineeringAttic insulationInternal wall insulationBased in Cavan · serves Connacht and Ulster · SEAI no. 15869Based in Cavan.
Rodney Brady Contracting LtdAttic insulationInternal wall insulationBased in Cavan · serves Dublin, Leinster and Ulster · SEAI no. 12481Based in Cavan.
Seamus O'ReillyAttic insulationExternal wall insulationInternal wall insulationBased in Cavan · serves Dublin, Leinster and Ulster · SEAI no. 17130Based in Cavan.

Also cover Cavan from elsewhere (177)

These told SEAI they cover the province Cavan 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.

Activ8 Energies (OSS) · 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) · Home Comfort Retrofits 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 · Abhaile Carpentry And Construction Ltd · AC Insulation · AGI Construction Ltd · All In Insulation · Allied Irish Property Ltd · Anthony Coughlan Heating & Plumbing TA C&S Construction Services · Anthony Quinn Construction Ltd · Antone Briody Construction Ltd · Ap Eco Building & Renovation · Apex Engineering · Auro Naes Ltd T/A Roesavin Construction · Aurora Construction Ltd · B. Donaghey & Sons · Barry Kiernan Construction Ltd · BCBAL Ltd T/A McGee Insulation · BCD Contracting Ltd · Bluebuild Renewables Ltd · Braecon Construction Ltd · Breen Heating and Plumbing Ltd · Brendan Mcgrenaghan Construction · Breslin Construction And Renovation Ltd · C.D.M. Contracts Ltd · Carl Byrne · Carrickmaquigley Construction Ltd · Cellulose Insulation Ltd · Ciocan Construction Ltd · Clar ICH Ltd · Clonmany Builders Limited · CMH Carpentry And Construction · Comfort Living Limited · Cs Drylining Ltd · Cunningham Mechanical Services Ltd · CW Xterior Solutions Ltd · D Carry Construction · D Monagle Drywall Ltd · Daask Build Ltd · Dabrena Properties Ltd · Damien Babington & Sons Ltd · DC Energy Solutions · Derchil Limited t/a CosiHomes · Derryveagh Contracts Ltd · DMT Renewables Ltd · Donegal Drylinning Ltd · Ds Fallon · Duey Brothers Ltd · Eco Home Insulation · Eco Pro Insulation · Eco Smart External Insulation Ltd · Eco Thermal Homes · Ecowise Insulation Ltd · Eiremaintenance.Ie · Eitas · Elem Construction Ltd T/A Inish Contracts · Enda Sean Construction Ltd · Ferm Eng Ltd · Finnegan & O'Neill Limited · Floelen Construction Ltd · Forma Design & Build Ltd · FS Plumbing & Heating Ltd · Galbraith Construction Ltd · Gavin McGonagle Windows · Gavin Tinney Limited · George Gill & Sons Construction Ltd · Glenturas Construction Ltd · Gmg Contracts Ltd · Gray Construction & Design Ltd · Green Air Technologies Ltd · Hamkel Holdings Ltd / Soltherm · Home Building Solutions T/A HBS Elegant build Ltd · Inish Mica Repairs Ltd · Inish Stone · Innovate Insulation Ltd · Insulate Ireland · J Shaw Carpentry Ltd · Jacob Insulation Limited · James Keenan Eco Limited T/A Keenan Eco · JMD Contracts Ltd · John Doherty Construction Ltd · John Grant Construction Ltd · John O Donnell Construction Ltd · John O'Loughlin & Son Ltd · Johnathan Timoney T/A Rendpro Ltd · K Friel Ceilings · K K Home & Building Services Ltd · Kelly Construction · Kelly Insulation Heating & Plumbing · Kilsarn Warmer Homes · Laghey Construction Ltd · Laurence Doherty Building Services Ltd · Laurence Mc Colgan Construction Ltd · Leitrim Warmer Homes CLG · M&W Fire Solutions Ltd · Madden Developments Ltd · Marcalla Limited · Marcoy Ltd · Markaye Contracts Ltd · Masterway Enterprises Ltd · Mc Menamin Building Contractors Ltd · Mc Namee Fabrication & Building Systems Ltd T/A Mc · McArdle Building Contractors Ltd · McCaher Construction Ltd. · McCallion Construction · Mclaughlin Taylor Drylining Roi Ltd · Md Isle Developments Ltd · MDCC Ltd · Meegan Insulations · Melmc Construction Ltd · Michael Kelly Glebe Builders Ltd · Michael Mc Colgan · Midland Warmer Homes Company Limited · MS Plastering Contractor · Multi Corp Construction Services Ltd · Multistructure Construction Ltd · Noel Kilpatrick Contruction Ltd · North West Retrofit · O'Loughlin Construction · Ora Timber Frame · Oriel Insulations · Ozone Insulation Ltd · P & A Drylining Ltd · P Shannon Building & Civil Engineering Ltd · P.T.M Carpentry & Building Ltd · Paddy Mc Hugh Building Ltd · Paddy Monagle Construction · Parker Construction Ltd · Paul Breslin Construction Ltd · Paul Doherty Construction Ltd · Philip Loughran Construction Ltd · Poly Coating and Sealing Ltd · Premier Insulations · Premier Solutions NW Ltd · Pro Walls Ltd · Reidy KDE construction Ltd · Rend Master Ltd · Renova · Retrofit Energy Ireland One Stop Shop Ltd · Revilo Properties Ltd. · Rio Ents Ltd ta A-Rate · Rmn Developments Ltd · Romac Acoustics Ltd · S&S Rankin Ltd · SBN Solid Home Ltd · Seamus Friel & Sons Ltd · Seamus Sweeney Drylining Ltd · SLP Westport · Solar Direct Ltd. · Solaregy T/A Sola · Solid Insulation Systems Ireland Ltd · Sovereign Finishes Limited · Ss Drylining & Plastering Ltd · Superior Insulations Ltd · Sustainable Warmth Ltd · Tirconaill Contracts Ltd T/A Mc Taggart Insulation · TLI Group Ltd T/A Transmission Links Ireland Ltd · Tomasz Rulak T/A Tombet Building · Tuatha Construction · Verde Remediation Services Ltd

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.

Check my home

The detail

How Cavan compares

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

Figure 1Published figure

200 internal wall insulation installers say they work in Cavan; the median county has 323

Cavan is 24th of 26. The most list Wicklow (462); the fewest, Donegal (196). 21 One Stop Shops list Cavan.

Cavan200
The median county323
Most: Wicklow462
Fewest: Donegal196

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 Cavan 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.

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 Cavan?: 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 Cavan 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