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 Roscommon?

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 Roscommon 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.

Internal wall insulation installers in Roscommon

301 companies on the SEAI register are based in or serve Roscommon for internal 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 Roscommon

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

Doonshore Waterside Ltd
Internal wall insulation
Based in Roscommon · serves Connacht · SEAI no. 20139
Based in Roscommon.
Downes Construction
Attic insulationInternal wall insulation
Based in Roscommon · serves Connacht · SEAI no. 17763
Based in Roscommon.
Eco Smart External Insulation Ltd
Attic insulationExternal wall insulationInternal wall insulation
Nationwide · SEAI no. 14432
Based in Roscommon.
External Insulation Plastering Ltd
External wall insulationInternal wall insulation
Based in Roscommon · serves Dublin, Leinster and Connacht · SEAI no. 16540
Based in Roscommon.
John Carty & Sons Ltd
Attic insulationInternal wall insulation
Based in Roscommon · serves Leinster and Connacht · SEAI no. 12508
Based in Roscommon.
John Crean Construction Limited
Internal wall insulation
Based in Roscommon · serves Connacht · SEAI no. 19783
Based in Roscommon.
Kh Energy Services Limited
Attic insulationInternal wall insulation
Based in Roscommon · serves Leinster, Munster and Connacht · SEAI no. 20177
Based in Roscommon.
Lynwood Construction Ltd
Attic insulationInternal wall insulation
Based in Roscommon · serves Leinster and Connacht · SEAI no. 19951
Based in Roscommon.
Midland Suspended Ceilings Ltd
Attic insulationInternal wall insulation
Based in Roscommon · serves Dublin, Leinster and Connacht · SEAI no. 19943
Based in Roscommon.
Midland Warmer Homes Company Limited
Attic insulationCavity wall insulationInternal wall insulation
Based in Roscommon · serves Leinster, Munster, Connacht and Ulster · SEAI no. 16255
Based in Roscommon.
Mountain View Construction Ltd
Attic insulationInternal wall insulation
Based in Roscommon · serves Connacht · SEAI no. 17800
Based in Roscommon.
O'Loughlin Construction
Attic insulationInternal wall insulation
Nationwide · SEAI no. 19454
Based in Roscommon.
Paddy Kilduff and Sons Builders Ltd TA Kilduff Con
Attic insulationExternal wall insulationInternal wall insulation
Based in Roscommon · serves Leinster, Munster and Connacht · SEAI no. 12408
Based in Roscommon.
Paul O'Connor
Attic insulationInternal wall insulation
Based in Roscommon · serves Connacht · SEAI no. 18054
Based in Roscommon.
PC Civils Limited
Attic insulationInternal wall insulation
Based in Roscommon · serves Dublin and Connacht · SEAI no. 19439
Based in Roscommon.

Also cover Roscommon from elsewhere (286)

These told SEAI they cover the province Roscommon 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 · Ap Eco Building & Renovation · Apex Engineering · Athlone Windows · Auro Naes Ltd T/A Roesavin Construction · Ballinderry Developments Ltd T/A Rebuild · Ballyhogan Plumbing Services Ltd · Barry Kiernan Construction Ltd · Bd Partitions + Ceilings Ltd · Beechgrove Developments Ltd · Belville Carpentry and Construction Ltd · Blackstrand Retrofit Ltd. · Bluerock Property Services Limited · Bnm Construction Services Ltd · Brendan Flynn · Brendan Roche · Brendan Sammon Aughnasheelin Ltd · Brendave Developments · Brian Forkan Carpentry & Construction · Brian Smith Heating & Plumbing Ltd · Bromur Energy Ltd · Brusna Energy Solutions Ltd · C S Moran Bros Builders Ltd · C.D.M. Contracts Ltd · Caherass Plastering Ltd · Caherdun Ltd · Carrowgarve Construction · Carrowmore Construction Ltd · Castleconnor Construction Ltd · Castlelough Corporation Ltd · Cellulose Insulation Ltd · Century Retrofit Ltd · Ciocan Construction Ltd · CJH Construction · Clai Ard Construction Ltd. · Clar ICH Ltd · Clioma House Ltd · Clydesdale Construction Co. Ltd. · Conneally Painting & Sons Trading As Conneally Group · Connole Construction Ltd · Cornacloy Construction Ltd · Corrib View Construction Ltd · Costello Insulation LTD · CW Xterior Solutions Ltd · Dalmoy Limited · Damien Ryan Contracts Ltd · Dask Construction Limited T/A Taylor Con & C W · David Flaherty Construction LTD · DC Energy Solutions · Dcb Duffy Carpentry & Building Ltd · Decarb Contracts Ltd · Declan Fahy Plastering LTD · Declan Taylor Carpentry & Building · Denis Fahey Construction Ltd · Denrich Developments · Derchil Limited t/a CosiHomes · Dermot Moyles Construction Ltd · Diarmuid O'Connell Carpentry Limited · Dkc Carpentry & Construction Ltd · DMC mechanical construction ltd · DMT Renewables Ltd · Dncf · Doorus Construction Ltd · 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 Thermal Homes · 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 · 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 · Gary Smyth Construction And Services Limited · Gerry Mchale Plumbing & Construction Contractors · Gleoite Homes Ltd · GM Barrett Construction Ltd · Gmg Contracts Ltd · Goldcross Developments 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 · Harbour Crest Developments Ltd · Harrington Hbrs Ltd · Harrington Insulations Limited · Holmes Insulation LTD · Home Building Solutions T/A HBS Elegant build Ltd · Homergy Ltd T/AComfort Solutions Retrofit · Howard Healy And Sons Contractors Ltd · HUGH MCGOWAN BUILDING SERVICES LIMITED · Ian O Donoghue Builders Limited · Inline Construction and Custom Carpentry Ltd · Innovate Insulation Ltd · Insulate Ireland · J Shaw Carpentry Ltd · Jacob Insulation Limited · James Heneghan Electrical Plumbing And Heating · James Keenan Eco Limited T/A Keenan Eco · Jason Kennedy Construction Ltd · Jb Windows & Doors · Jf Fordham Construction Ltd · Joe Dunican Plumbing And Heating Ltd · Joe Gavin Ltd · John Doohan and Company Ltd · John Healy Construction Ltd · John Joe Faherty · John O'Loughlin & Son Ltd · John Paul Lardner Carpentry · John Ryan Construction Ltd. · Johnathan Timoney T/A Rendpro Ltd · Judge Brothers Ltd · K K Home & Building Services Ltd · K&D Developments (Sligo) Ltd. · Kelly Construction Gort Ltd · Kelly Insulation Heating & Plumbing · Kenmore Builders · Kesel Construction Ltd · Kevin Conneely Construction · Kg Future Homes Limited · Kilcastle Construction Ltd · Kilmallock Developments Ltd · Kilsarn Warmer Homes · Kingscourt Insulation Ltd · Kirrane Engineering Limited · Leitrim Warmer Homes CLG · Leslie Hamilton Construction · M&W Fire Solutions Ltd · Mac West Construction Ltd · Madden Developments Ltd · Magical Reconstruction Ltd · Maloney Quarries Ltd · Markaye Contracts Ltd · Matthew Rice T/A Mattie Rice Carpentry · McCaher Construction Ltd. · McInerney and Keane Insulation · McMorrow Renewables Limited · McNabola Brothers.Ltd · McNena Construction Ltd · Melmc Construction Ltd · Metro Utilities Ltd T/A Metro Developments · Michael Cawe (Suspended Ceilings) Ltd · Michael Kelly Glebe Builders Ltd · Michael Plausin · Micheal Golden Construction Ltd · Mjkhomes Galway Ltd · MMED Construction Services Ltd · MS Plastering Contractor · Muggivan Brothers Construction Ltd · Multi Corp Construction Services Ltd · Mulway Construction Limited · Namloc Const Ltd T/A Coleman Bros Construction · Nc Carpentry & Construction Ltd · Niatara Construction Ta Apollo Insulation · North West Retrofit · Nrr Renovations Limited · Oak Barn Construction Ltd · OCI Insulation · Ora Timber Frame · Oriel Insulations · Orm Contractors Ltd · P Mcgovern & Son Construction Ltd · P.J. McHale · Padraig Brady Carpentry Limited · Paraic O'Brien Construction · Parker Construction Ltd · Pat Loftus Construction Ltd · Pbrogan Plastering Ltd · PDJ Construction · Peter Brereton Plastering · Peter Fallon & Sons Ltd · Peter McKiernan Construction & Engineering · Peter Oneill Construction Ltd · Phelan Construction · Poly Coating and Sealing Ltd · PPGIH Business Ltd t/a Premier Irish Homes · Premier Insulations · Proconstruct Limited · Professional Solid Insulation · Raphael Considine Construction · Raphael Murray Plastering & EWI · 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 Lydon · 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 · Spreadwell Construction Ltd · Ss Drylining & Plastering Ltd · Stephen Doherty · Steve Moylan Limited · Superior Insulations Ltd · Sustainable Warmth Ltd · Swallow Building And Construction Ltd · T Insulations · Tamburah 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 · TS Gormley Construction Ltd · Unyte Solutions · Verde Remediation Services Ltd · Walter Moran Insulation · Winters Construction

What it costs, and what the grant pays

The grant for a semi-detached house is €3,500. SEAI recorded a middle price of €10,420 for this work last year, which leaves about €6,920 for you to pay. These are national figures, not Roscommon 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 internal wall insulation quotes in Roscommon

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 Roscommon?: 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 Roscommon 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 Roscommon

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.