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 Longford?

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 Longford 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 Longford

171 companies on the SEAI register are based in or serve Longford 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 Longford

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

Kilsarn Warmer Homes
Attic insulationExternal wall insulationInternal wall insulation
Based in Longford · serves Dublin, Leinster, Connacht and Ulster · SEAI no. 17367
Based in Longford.

Also cover Longford from elsewhere (170)

These told SEAI they cover the province Longford 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.

Activ8 Energies (OSS) · Ashgrove Engineering Ltd T/A Ashgrove Renewables (OSS) · Aspen Eco Power (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) · Energyfix (OSS) · Envirobead Ltd. (OSS) · Greenwatt Ltd (OSS) · Home Comfort Retrofits Ltd (OSS) · House 2 Home Retrofit Ltd (OSS) · Integrate Home Energy Upgrades Limited (OSS) · Kingdom Installation Ltd (OSS) · Kingspan Insulation Ltd (OSS) · Kore Retrofit Ltd (OSS) · Lough Projects (OSS) · Moston Construction Ltd (OSS) · OHK Energy LTD (OSS) · Retrofit Design Ltd (OSS) · Retrofit Energy Ireland (OSS) · SSE Airtricity Energy Services Ltd (OSS) · A & D External Wrap Ltd · Absolute Acrylics Ltd · Ailesbury Warm Homes Ltd T/A Warmhomes.ie · Alan Murphy Construction Ltd T/A AM Construction · Algricris Construction Ltd · All Weather External Insulation Ltd · All Weather Insulation · Alpine Sunrooms Ltd · ANEIS Ltd T/A AN External Insulation Specialist · Anthony Coughlan Heating & Plumbing TA C&S Construction Services · Ap Eco Building & Renovation · AR Plastering Ltd · Ashmark Civil And Utilities · AVM Construction Ltd · Ballinderry Developments Ltd T/A Rebuild · Bernard McKeown Plastering · Better Me Ltd Ta North Shield Insulation · bightheplumber Ltd · Blacksea Construction And Supply Limited · Bluebuild Renewables Ltd · Brayton Homes · C & W Insulations · Carlow Insulation Solutions · Carrickmaquigley Construction Ltd · Castlestone Construction BV Ltd · Century Retrofit Ltd · Ciocan Construction Ltd · CJH Construction · CK Energy Management Solutions (EMS) Ltd t/a ENCON · CKF Interiors & Insulation · Claxton Plastering And Insulation Ltd · Complete Insulations and Energy Upgrades Ltd · Cool To Be Warm Insulation T/A Kevin Hoey Carpentr · CW Xterior Solutions Ltd · Damien Ryan Contracts Ltd · David Flaherty Construction LTD · DC Energy Solutions · Decarb Contracts Ltd · Declan Fahy Plastering LTD · Declan O Brien Construction Limited · Delta Build Development · Derchil Limited t/a CosiHomes · DJH INSULATION LTD · DMT Renewables Ltd · Ds Fallon · Dublin All Trades Building Services · Duey Brothers Ltd · Eco Pro Insulation · Eco Shield External Insulation Ltd · Eco Smart External Insulation Ltd · Eco Thermal Homes · Eco Warmer Homes · Ecoinsulationplus.Ie · Ecomax Construction Services Ltd · Ecowrap · Edwardyna Construction Ltd · Eirgreen · Elitetherm · Energy Retrofit Ireland · Energysmart Construction Ltd · Equinox Construction Ltd · Expert Residential PropertyLtd T/A Expert Property · External Insulation Plastering Ltd · Fabian Anton · Finlay EcoFit Tullamore Ltd · Floelen Construction Ltd · G & D Construction Projects Ltd · G.V.Services Limited · Grainger Energy Solutions Ltd · Green - Lux Construction Ltd · Green Air Technologies Ltd · Green Home Technology Ltd · Greentech Insulations Waterford ltd Greentech Facades · Hamkel Holdings Ltd / Soltherm · Harrington Insulations Limited · Harry Twomey Plastering · HDC Construction · Heco Construction Ltd · Hoar Rock Construction Ltd · Home Building Solutions T/A HBS Elegant build Ltd · Homeology Ltd · Hometherm Insulation Ltd · House Proud Unique (HPU) · Hughes and Co External Insulation · Insulate Ireland · Insulate your home Ltd · Jacob Insulation Limited · James Doran & Son Ltd · JMCK Building Solutions Ltd · John Skehan Services Ltd · Kieran Walsh Building & Plastering Ltd · Kilmallock Developments Ltd · Kokoon Insulation Ltd · Leetherm Insulation Ltd. · Leitrim Warmer Homes CLG · Leonard Price Developments Ltd · Luca Line Limited TA Luca Line Services · Madden Developments Ltd · McCaher Construction Ltd. · McMorrow Renewables Limited · Meegan Insulations · Metro Insulation Ltd · Michael O Reilly Plastering & Wall Insulation · Midland Ecowrap · MJS Eco Limited · Moran Retrofit Solutions · MS Plastering Contractor · Murphy Brothers · Narod Insulation Contractors Ltd · National Retrofit & Construction Services Ltd · North Dublin Heating · Notrom Ltd · Novin Consultants Ltd · O'Toole Plastering · Old Court Construction · Pa Home Renovations · Paddy Kilduff and Sons Builders Ltd TA Kilduff Con · Peter Brereton Plastering · Platinum Insulation · Pro Walls Ltd · Professional Solid Insulation · QDL Insulation · R & U Company Ltd. · Rend Master Ltd · Ryan And Kennedy · SBN Solid Home Ltd · Seamus O'Reilly · Sema Construction Limited · Sloane Plastering LTD · Solaregy T/A Sola · Solid Insulation Systems Ireland Ltd · Sovereign Finishes Limited · Spreadwell Construction Ltd · Stone Arches LTD T/A Waterford Insulation · Superior Insulations Ltd · Taylormade Plastering · Tekton Contruction Ltd · The Best Insulation · Thermotech Retrofit Ltd · Tirconaill Contracts Ltd T/A Mc Taggart Insulation · TLI Group Ltd T/A Transmission Links Ireland Ltd · Tomasz Rulak T/A Tombet Building · Tus Nua Building Services Ltd · Vos Premium Services Ltd · Warm Walls Insulation Ltd · William Maguire T/A Therma - Rend

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 Longford 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 Longford

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 Longford?: 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 Longford 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 Longford

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.