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Internal wall insulation installers in Donegal

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

  • 76 are based in Donegal; the other 120 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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Based in Donegal

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

Also cover Donegal from elsewhere (120)

These told SEAI they cover the province Donegal 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) · Breffni Insulation Ltd (OSS) · Churchfield Home Services (OSS) · Cooper Insulation Ltd. (OSS) · Electric Ireland Superhomes (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 · Abbey View Construction Lmited · AGI Construction Ltd · Airpacks T/A Kore Insulation · All In Insulation · Allied Irish Property Ltd · Anthony Brady Plumbing Limited · Anthony Coughlan Heating & Plumbing TA C&S Construction Services · Antone Briody Construction Ltd · AO Electrical And Solar Ltd · Ap Eco Building & Renovation · Apex Engineering · Auro Naes Ltd T/A Roesavin Construction · Aurora Construction Ltd · Barry Kiernan Construction Ltd · Blackwell Consultancy T/A Blackwell Contracts · Bluebuild Renewables Ltd · Breen Heating and Plumbing Ltd · C.D.M. Contracts Ltd · Cando Engineering Ltd · Carolan Murphy Ltd · Cellulose Insulation Ltd · Ciocan Construction Ltd · Clar ICH Ltd · Cloonagh Construction Ltd · Comfort Living Limited · Cunningham Mechanical Services Ltd · CW Xterior Solutions Ltd · D Carry Construction · Dabrena Properties Ltd · Damien Babington & Sons Ltd · DC Energy Solutions · Decarb Contracts Ltd · Derchil Limited t/a CosiHomes · Ds Fallon · Eco Home Insulation · Eco Pro Insulation · Eco Smart External Insulation Ltd · Eco Thermal Homes · Ecowise Insulation Ltd · Edward Eccleston · Eitas · Evertherm Ltd T/A Annalee Energy Ltd · Finnegan & O'Neill Limited · Floelen Construction Ltd · Forma Design & Build Ltd · Gmg Contracts Ltd · Gray Construction & Design Ltd · Green - Lux Construction Ltd · Green Air Technologies Ltd · Hamkel Holdings Ltd / Soltherm · Home Building Solutions T/A HBS Elegant build Ltd · Innovate Insulation Ltd · J Shaw Carpentry Ltd · Jacob Insulation Limited · JJR Insulation Ltd · K K Home & Building Services Ltd · Kelly Insulation Heating & Plumbing · Kilsarn Warmer Homes · Kingscourt Insulation Ltd · Leitrim Warmer Homes CLG · Madden Developments Ltd · Markaye Contracts Ltd · McArdle Building Contractors Ltd · McCaher Construction Ltd. · McMorrow Renewables Limited · Meegan Insulations · Midland Warmer Homes Company Limited · MS Plastering Contractor · Multi Corp Construction Services Ltd · Noel Kilpatrick Contruction Ltd · O'Loughlin Construction · Oriel Insulations · P Mcgovern & Son Construction Ltd · P Shannon Building & Civil Engineering Ltd · P.T.M Carpentry & Building Ltd · Padraig Brady Carpentry Limited · Parker Construction Ltd · Peter McKiernan Construction & Engineering · Philip Loughran Construction Ltd · Poly Coating and Sealing Ltd · Premier Insulations · Pro Walls Ltd · Rend Master Ltd · Renova · Retrofit Energy Ireland One Stop Shop Ltd · Revilo Properties Ltd. · Rio Ents Ltd ta A-Rate · Rodney Brady Contracting Ltd · Romac Acoustics Ltd · SBN Solid Home Ltd · Seamus O'Reilly · SLP Westport · Solar Direct Ltd. · Solaregy T/A Sola · Solid Insulation Systems Ireland Ltd · Sovereign Finishes Limited · Superior Insulations Ltd · Sustainable Warmth Ltd · TLI Group Ltd T/A Transmission Links Ireland Ltd · Tomasz Rulak T/A Tombet Building · Verde Remediation Services Ltd

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

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The detail

How Donegal compares

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

Figure 1Published figure

196 internal wall insulation installers say they work in Donegal; the median county has 323

Donegal is 26th of 26. The most list Wicklow (462); the fewest, Donegal (196). 18 One Stop Shops list Donegal.

  • Donegal196
  • 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 Donegal 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.

  1. Wait for your grant approval email before any work starts. SEAI does not pay for work that began before it was approved.
  2. Get at least three quotes, and check each one covers the same job. The cheapest quote is often the one that leaves something out.
  3. 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.
  4. 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 Donegal?
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 Donegal 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