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 Kerry?

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 Kerry 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.

Cavity wall insulation installers in Kerry

83 companies on the SEAI register are based in or serve Kerry for cavity 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 Kerry

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

Kingdom Installation LtdOne Stop Shop
Attic insulationCavity wall insulationExternal wall insulationHeat pumpHeating controlsInternal wall insulationSolar hot waterWindow and door
Nationwide · SEAI no. 10029 · Website
Based in Kerry.
Retrofit Design LtdOne Stop Shop
Attic insulationCavity wall insulationExternal wall insulationHeat pumpHeating controlsInternal wall insulationSolar hot waterWindow and door
Nationwide · SEAI no. 16033 · Website
Based in Kerry.
AB Teague Enterprises Ltd
Attic insulationCavity wall insulationInternal wall insulation
Based in Kerry · serves Leinster, Munster, Connacht and Ulster · SEAI no. 12399
Based in Kerry.
Harrington Insulations Limited
Attic insulationCavity wall insulationExternal wall insulationInternal wall insulation
Based in Kerry · serves Dublin, Leinster, Munster and Connacht · SEAI no. 11981
Based in Kerry.
Quilter Insulation
Attic insulationCavity wall insulationExternal wall insulationHeat pumpHeating controlsInternal wall insulation
Based in Kerry · serves Munster · SEAI no. 15663
Based in Kerry.
Sheehy Insulation Ltd
Attic insulationCavity wall insulationExternal wall insulation
Based in Kerry · serves Munster · SEAI no. 10018
Based in Kerry.
Sustainable Warmth Ltd
Attic insulationCavity wall insulationInternal wall insulationWindow and door
Nationwide · SEAI no. 18033
Based in Kerry.

Also cover Kerry from elsewhere (76)

These told SEAI they cover the province Kerry 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) · Churchfield Home Services (OSS) · Electric Ireland Superhomes (OSS) · Energywise Ireland (OSS) · Envirobead Ltd. (OSS) · Greenwatt Ltd (OSS) · House 2 Home Retrofit Ltd (OSS) · Kilgobbin Castle Holdings Ltd t/a Insulex (OSS) · Kingspan Insulation Ltd (OSS) · Kore Retrofit Ltd (OSS) · Moston Construction Ltd (OSS) · Munster External Wall Insulation T/A SE Systems (OSS) · OHK Energy LTD (OSS) · Retrofit Energy Ireland (OSS) · SSE Airtricity Energy Services Ltd (OSS) · All In Insulation · Alpha Insulation Ltd T/A Western Insulation · Anthony Coughlan Heating & Plumbing TA C&S Construction Services · Ardvark Insulation Ltd · C & W Insulations · Carlow Insulation Solutions · CK Energy Management Solutions (EMS) Ltd t/a ENCON · Clar ICH Ltd · Connolly Insulation · Corkery Alu-Cast Enterprises Ltd · Corrib View Construction Ltd · Cosyfill Insulation · Damien Ryan Contracts Ltd · Derchil Limited t/a CosiHomes · Dungarvan External Insulation Ltd · Dungarvan Insulation Ltd · Eco Home Insulation · Ecosy Better Homes Ltd · Ecotec Insulation Ltd · Ecotech Contracts IRI Ltd · Ecowise Insulation Ltd · Eirgreen · Evertherm Ltd T/A Annalee Energy Ltd · Fagan Crossmolina Limited · Finlay EcoFit Tullamore Ltd · Five Counties Home Insulation Limited · Home Works Insulation · Innovate Insulation Ltd · Instant Eco Homes Ltd · IRD Duhallow · J.D. Buckley Construction Ltd · Jacob Insulation Limited · John Taylor Construction Ltd · Kelly Insulation Heating & Plumbing · Kingscourt Insulation Ltd · Leetherm Insulation Ltd. · Leitrim Warmer Homes CLG · MAK Building Services Ltd · McCormack Insulation · McInerney and Keane Insulation · Metro Insulation Ltd · Michael Ormond Ltd · Midland Warmer Homes Company Limited · Moran Retrofit Solutions · National Retrofit & Construction Services Ltd · O Leary Insulation · OG Insulation Limited · OS Insulate Ltd · PNA insulation Ltd T/A O'Loghlen Insulation Ltd · Premier Insulations · Ryan Spray Foam · Solastech Insulation Ltd · South East Insulations · Spreadwell Construction Ltd · Stone Arches LTD T/A Waterford Insulation · Superior Insulations Ltd · Thermowise Insulations Limited · Tirconaill Contracts Ltd T/A Mc Taggart Insulation

What it costs, and what the grant pays

The grant for a semi-detached house is €1,300. SEAI recorded a middle price of €1,550 for this work last year, which leaves about €250 for you to pay. These are national figures, not Kerry 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 cavity wall insulation quotes in Kerry

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 Kerry?: 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 Kerry 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 Kerry

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.