Cavity wall insulation installers in Offaly
92 companies on the SEAI register are based in or serve Offaly for cavity wall insulation (register as of 8 September 2026).
Based in Offaly
5 of them. Sorted by what they are registered for, then by name — this is not an order of merit.
- Ardvark Insulation Ltd
Attic insulationCavity wall insulation
Based in Offaly · serves Dublin, Leinster, Munster and Connacht · SEAI no. 11528
Based in Offaly. - Ecotec Insulation Ltd
Attic insulationCavity wall insulation
Nationwide · SEAI no. 17454
Based in Offaly. - Finlay EcoFit Tullamore Ltd
Attic insulationCavity wall insulationExternal wall insulationHeat pumpHeating controlsInternal wall insulationSolar hot water
Based in Offaly · serves Dublin, Leinster, Munster and Connacht · SEAI no. 12532
Based in Offaly. - Premier Insulations
Attic insulationCavity wall insulationInternal wall insulationWindow and door
Nationwide · SEAI no. 10131
Based in Offaly. - Thermowise Insulations Limited
Attic insulationCavity wall insulation
Nationwide · SEAI no. 18082
Based in Offaly.
Also cover Offaly from elsewhere (87)
These told SEAI they cover the province Offaly 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) · CBM Munster Construction T/A Home Energy Retrofits (OSS) · Churchfield Home Services (OSS) · Cooper Insulation Ltd. (OSS) · Electric Ireland Superhomes (OSS) · Energlaze Home Energy Upgrades (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) · Leetherm Project Management 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) · WiEnergy (OSS) · AB Teague Enterprises Ltd · Absolute Insulation Ltd · All In Insulation · Alpha Insulation Ltd T/A Western Insulation · Anthony Coughlan Heating & Plumbing TA C&S Construction Services · C & W Insulations · Carlow Insulation Solutions · CK Energy Management Solutions (EMS) Ltd t/a ENCON · Clane Building Works · Clar ICH Ltd · Complete Insulations and Energy Upgrades Ltd · Damien Ryan Contracts Ltd · Derchil Limited t/a CosiHomes · Eamonn Finn · Eco Home Insulation · Ecospec Limited · Ecotech Contracts IRI Ltd · Ecowise Insulation Ltd · Eirgreen · Evertherm Ltd T/A Annalee Energy Ltd · F C Insulation · Fagan Crossmolina Limited · Five Counties Home Insulation Limited · G. Reilly Construction Ltd · Gallen Insulation Ltd · Gar Insulation Ltd · Harrington Insulations Limited · Home Works Insulation · Hometherm Insulation Ltd · Innovate Insulation Ltd · Instant Eco Homes Ltd · Jacob Insulation Limited · John Taylor Construction Ltd · Keating Insulation Ltd · Kelly Insulation Heating & Plumbing · Kingscourt Insulation Ltd · Leetherm Insulation Ltd. · Leitrim Warmer Homes CLG · McCormack Insulation · Meegan Insulations · Metro Insulation Ltd · Midland Warmer Homes Company Limited · Model County Insulation · Moran Retrofit Solutions · National Retrofit & Construction Services Ltd · NE Energy Efficient Homes Ltd · O Leary Insulation · OG Insulation Limited · Powell Insulations Ltd · QDL Insulation · Rob Lacey Insulations Ltd · Ryan Spray Foam · South East Insulations · Spreadwell Construction Ltd · Stone Arches LTD T/A Waterford Insulation · Superior Insulations Ltd · Sustainable Warmth Ltd · Tirconaill Contracts Ltd T/A Mc Taggart Insulation · Warm 'n Cosy Homes Limited
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 Offaly 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.
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 OffalyCommon 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 Offaly?
- 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 Offaly 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 Offaly
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.