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 Sligo?

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 Sligo 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.

Attic insulation installers in Sligo

315 companies on the SEAI register are based in or serve Sligo for attic insulation (register as of 8 September 2026).

Gloved hands pressing mineral-wool insulation between the timbers of a roof. — Unrecognizable worker insulating with stone wool · Erik Mclean · Pexels License · Photo credits

Based in Sligo

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

Adrian Maguire T/A Abbey Insulation
Attic insulationCavity wall insulation
Based in Sligo · serves Connacht · SEAI no. 10017
Based in Sligo.
Belville Carpentry and Construction Ltd
Attic insulationInternal wall insulation
Based in Sligo · serves Connacht · SEAI no. 17450
Based in Sligo.
Bnm Construction Services Ltd
Attic insulationInternal wall insulationWindow and door
Based in Sligo · serves Dublin, Leinster and Connacht · SEAI no. 19458
Based in Sligo.
Brendan Flynn
Attic insulationInternal wall insulation
Based in Sligo · serves Connacht · SEAI no. 19389
Based in Sligo.
Brusna Energy Solutions Ltd
Attic insulationCavity wall insulationExternal wall insulationHeat pumpHeating controlsInternal wall insulationSolar hot waterWindow and door
Based in Sligo · serves Connacht · SEAI no. 10066
Based in Sligo.
Carrowmore Construction Ltd
Attic insulationInternal wall insulation
Based in Sligo · serves Connacht · SEAI no. 19370
Based in Sligo.
Castleconnor Construction Ltd
Attic insulationInternal wall insulation
Based in Sligo · serves Connacht · SEAI no. 15854
Based in Sligo.
Clioma House Ltd
Attic insulationInternal wall insulation
Nationwide · SEAI no. 10781
Based in Sligo.
Dask Construction Limited T/A Taylor Con & C W
Attic insulationInternal wall insulation
Based in Sligo · serves Connacht · SEAI no. 16933
Based in Sligo.
Declan Taylor Carpentry & Building
Attic insulationInternal wall insulation
Based in Sligo · serves Connacht · SEAI no. 18018
Based in Sligo.
Denis Fahey Construction Ltd
Attic insulationInternal wall insulationWindow and door
Based in Sligo · serves Connacht · SEAI no. 17900
Based in Sligo.
Goldcross Developments Ltd
Attic insulationInternal wall insulation
Based in Sligo · serves Connacht · SEAI no. 19406
Based in Sligo.
HUGH MCGOWAN BUILDING SERVICES LIMITED
Attic insulationInternal wall insulation
Based in Sligo · serves Connacht · SEAI no. 15838
Based in Sligo.
Jason Kennedy Construction Ltd
Attic insulationInternal wall insulation
Based in Sligo · serves Connacht · SEAI no. 19950
Based in Sligo.
John Doohan and Company Ltd
Attic insulationCavity wall insulationExternal wall insulationInternal wall insulation
Based in Sligo · serves Connacht · SEAI no. 15884
Based in Sligo.
K&D Developments (Sligo) Ltd.
Attic insulationInternal wall insulationWindow and door
Based in Sligo · serves Dublin, Leinster, Munster and Connacht · SEAI no. 16119
Based in Sligo.
Kilrehill Bros
Attic insulationInternal wall insulation
Based in Sligo · and 6 other counties · SEAI no. 17105
Based in Sligo.
Leslie Hamilton Construction
Attic insulationInternal wall insulation
Based in Sligo · serves Connacht · SEAI no. 19961
Based in Sligo.
Peter Oneill Construction Ltd
Attic insulationInternal wall insulation
Based in Sligo · serves Connacht · SEAI no. 20147
Based in Sligo.
Swallow Building And Construction Ltd
Attic insulationInternal wall insulation
Based in Sligo · serves Connacht · SEAI no. 18157
Based in Sligo.
TS Gormley Construction Ltd
Attic insulationInternal wall insulation
Based in Sligo · serves Connacht · SEAI no. 13283
Based in Sligo.

Also cover Sligo from elsewhere (294)

These told SEAI they cover the province Sligo 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) · 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 · Absolute Acrylics Ltd · Absolute Insulation Ltd · AC Insulation · AGI Construction Ltd · Airpacks T/A Kore Insulation · Airtight Eco Build Ltd · Alex Building Services · All In Insulation · Alpha Insulation Ltd T/A Western Insulation · Annex Building Renovation Ltd · Anthony Brady Plumbing Limited · Anthony Coughlan Heating & Plumbing TA C&S Construction Services · Anthony Quinn Construction Ltd · AO Electrical And Solar Ltd · AP Building Contractors Ltd · Apex Engineering · Ardvark Insulation Ltd · Asyl Insulation Limited T/A Foam Pro · Attic Floors and Ladders · Auro Naes Ltd T/A Roesavin Construction · Baker & Co Ltd Insulations · Ballinderry Developments Ltd T/A Rebuild · Ballyhogan Plumbing Services Ltd · Barry Kiernan Construction Ltd · Bartley Heanue Construction · Bd Partitions + Ceilings Ltd · Beechgrove Developments Ltd · Bio Insulate Ltd · Blackstrand Retrofit Ltd. · Bluerock Property Services Limited · Brendan Roche · Brendan Sammon Aughnasheelin Ltd · Brendave Developments · Brian Forkan Carpentry & Construction · Brian Smith Heating & Plumbing Ltd · Bromur Energy Ltd · C S Moran Bros Builders Ltd · C.D.M. Contracts Ltd · Caherdun Ltd · Carrowgarve Construction · Castlelough Corporation Ltd · Cellulose Insulation Ltd · Century Retrofit Ltd · Ciocan Construction Ltd · Clai Ard Construction Ltd. · Clar ICH Ltd · Cleare Home Improvements & Insulation · Clydesdale Construction Co. Ltd. · Connole Construction Ltd · Cornacloy Construction Ltd · Corrib View Construction Ltd · Costello Insulation LTD · CW Xterior Solutions Ltd · Dalmoy Limited · Damien Ryan Contracts Ltd · David Flaherty Construction LTD · David Kelly Ta East Mayo Energy Solutions · DC Energy Solutions · Dcb Duffy Carpentry & Building Ltd · Decarb Contracts Ltd · Denrich Developments · Derchil Limited t/a CosiHomes · Dermot Gately Carpentry and Construction · Dermot Moyles Construction Ltd · Diarmuid O'Connell Carpentry Limited · Dkc Carpentry & Construction Ltd · DMC mechanical construction ltd · DMT Renewables Ltd · Dncf · Doorus Construction Ltd · Downes Construction · Dromahair Tully Construction Ltd · Ds Fallon · Dt Gorman Developments Ltd · Duane Construction Limited · Dublin All Trades Building Services · Duey Brothers Ltd · Dunne Drylining Ltd · E Ansbro Construction LTD · E.C.S.C Insulation Services Ltd · Eamonn Finn · Eco Home Insulation · Eco Pro Insulation · Eco Smart External Insulation Ltd · Eco Thermal Homes · Ecotec Insulation Ltd · Ecotech Contracts IRI Ltd · Ecowise Insulation Ltd · Ecowrap · Edward Eccleston · Egan Mulready Developments Ltd · Eitas · Elem Construction Ltd T/A Inish Contracts · Ely Houseworks Ltd · Energy Retrofit Ireland · Energywise Savings Ireland Ltd · Evertherm Ltd T/A Annalee Energy Ltd · EZ Build · Fagan Crossmolina Limited · Fahy Insulations Ltd · Ferm Eng Ltd · Finbarr McMahon Carpentry/Construction · Finlay EcoFit Tullamore Ltd · Firetech Experts Ltd · Fitzpatrick Plumbing & Heating Contractors Ltd · Floelen Construction Ltd · Forma Design & Build Ltd · G & S Construction & Plant Hire Limited · G.V.Services Limited · Gallen Insulation Ltd · Gary Smyth Construction And Services Limited · Gerry Mchale Plumbing & Construction Contractors · Gleoite Homes Ltd · GM Barrett Construction Ltd · Gmg Contracts Ltd · Goode Energy · Goodmar Construction Ltd · Gr Carpentry Ltd · Grainger Energy Solutions Ltd · Green - Lux Construction Ltd · Green Air Technologies Ltd · Hamkel Holdings Ltd / Soltherm · Harrington Hbrs Ltd · Harrington Insulations Limited · Holmes Insulation LTD · Home Building Solutions T/A HBS Elegant build Ltd · Homergy Ltd T/AComfort Solutions Retrofit · Horan Plumbing Ltd · Ian O Donoghue Builders Limited · Inline Construction and Custom Carpentry Ltd · Innovate Build Greener Ltd · Innovate Insulation Ltd · Instant Eco Homes Ltd · Insulate Ireland · J Shaw Carpentry Ltd · James Heneghan Electrical Plumbing And Heating · James Keenan Eco Limited T/A Keenan Eco · Jf Fordham Construction Ltd · JJS Plumbing & Heating Limited · Joe Dunican Plumbing And Heating Ltd · Joe Gavin Ltd · John Carty & Sons Ltd · John Healy Construction Ltd · John Joe Faherty · John O'Loughlin & Son Ltd · Jonathan O'Connor · Judge Brothers Ltd · K K Home & Building Services Ltd · Kelly Construction Gort Ltd · Kelly Insulation Heating & Plumbing · Kenmore Builders · Kesel Construction Ltd · Kevin Conneely Construction · Kg Future Homes Limited · Kh Energy Services Limited · Kilcastle Construction Ltd · Kilmallock Developments Ltd · Kilsarn Warmer Homes · Kingscourt Insulation Ltd · Leitrim Warmer Homes CLG · Lovinsulation Ltd. · Lynwood Construction Ltd · M&W Fire Solutions Ltd · Mac West Construction Ltd · MacKessy Construction Ltd · Madden Developments Ltd · Magical Reconstruction Ltd · Mal Property Maintenance · Maloney Quarries Ltd · Mannion Passive House Builders Ltd · Markaye Contracts Ltd · Matthew Rice T/A Mattie Rice Carpentry · Mc Elligott Heating & Plumbing Limited · McCaher Construction Ltd. · McCormack Insulation · McInerney and Keane Insulation · McMorrow Renewables Limited · McNabola Brothers.Ltd · Melmc Construction Ltd · Metro Insulation Ltd · Metro Utilities Ltd T/A Metro Developments · MG Insulation · Michael Cawe (Suspended Ceilings) Ltd · Michael Kelly Glebe Builders Ltd · Michael Plausin · Midland Suspended Ceilings Ltd · Midland Warmer Homes Company Limited · Mjkhomes Galway Ltd · MMED Construction Services Ltd · Moran Retrofit Solutions · Mountain View Construction Ltd · MS Plastering Contractor · Muggivan Brothers Construction Ltd · Multi Corp Construction Services Ltd · Mulway Construction Limited · Namloc Const Ltd T/A Coleman Bros Construction · National Retrofit & Construction Services Ltd · Nc Carpentry & Construction Ltd · Niatara Construction Ta Apollo Insulation · Noel Holmes Construction Ltd. · North West Retrofit · Nrr Renovations Limited · O'Loughlin Construction · Oak Barn Construction Ltd · OCI Insulation · OG Insulation Limited · Ora Timber Frame · Oriel Insulations · Orm Contractors Ltd · Ozone Insulation Ltd · P Mcgovern & Son Construction Ltd · Paddy Kilduff and Sons Builders Ltd TA Kilduff Con · Padraig Brady Carpentry Limited · Paraic O'Brien Construction · Parker Construction Ltd · Pat Loftus Construction Ltd · Paul O'Connor · PC Civils Limited · PDJ Construction · Peter Fallon & Sons Ltd · Peter McKiernan Construction & Engineering · Phelan Construction · PNA insulation Ltd T/A O'Loghlen Insulation Ltd · Poly Coating and Sealing Ltd · PPGIH Business Ltd t/a Premier Irish Homes · Premier Insulations · Proconstruct Limited · Raphael Considine Construction · Reality Renovations Ltd · Redfern Construction Ltd · Rend Master Ltd · Renova · Restore Building Company Ltd · Retrofit Energy Ireland One Stop Shop Ltd · Rio Ents Ltd ta A-Rate · RMC Ecobuild Ltd · Rmn Developments Ltd · Ronan Devers Plastering · Ruane Insulation Ltd T/A Better Energy Solutions · Ryan Spray Foam · SBN Solid Home Ltd · Seamus O'Brien & Sons Builders (Castlebar) Ltd · Seamus Ryan Roofing Ltd · Sean Paul Construction Ltd · Shane Langan Construction Ltd · SKD Construction · SLP Westport · Smyth Project Management Ltd. T/A Teknabuild · Solaregy T/A Sola · Solaris Green Energy · Solid Insulation Systems Ireland Ltd · Sovereign Finishes Limited · SprayFoam Direct Distribution Ltd. · Ss Drylining & Plastering Ltd · Stephen Doherty · Steve Moylan Limited · Superior Insulations Ltd · Sustainable Warmth Ltd · T Insulations · Ta Patrick Mcknight Roofing · Tamburah Limited · Thermowise Insulations Limited · Timahoe Construction T/A Leinster Property Service · Tirconaill Contracts Ltd T/A Mc Taggart Insulation · TLI Group Ltd T/A Transmission Links Ireland Ltd · Tomasz Rulak T/A Tombet Building · Treacon Carpentry & Building Services Ltd · Unyte Solutions · Verde Remediation Services Ltd · Walter Moran Insulation · Warm 'n Cosy Homes Limited · Warmcore Homes Ltd · West Coast Insulations Ltd · Winters Construction

What it costs, and what the grant pays

The grant for a semi-detached house is €1,500. SEAI recorded a middle price of €2,000 for this work last year, which leaves about €500 for you to pay. These are national figures, not Sligo 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 attic insulation quotes in Sligo

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 Sligo?: 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 Sligo 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 Sligo

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.