Company lists · Data refreshed September 2026

Top 25 Insulation contractors based in Ireland

Name: Insulation contractors based in Ireland
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 17, 2026 122 companies tracked

RevenueBase identified 122 insulation contractors headquartered in Ireland as of September 2026 and tracks 1,843 professional contacts across them, including 802 with verified work emails. Dublin is the largest hub.

This list covers insulation contractors headquartered in Ireland, matched on what each company actually does as described in its own words. Ranked by team size, largest first. Every row shows the company's own description, its RevenueBase Smart Search rating, and when it was last checked. Data refreshed September 17, 2026.

Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase Smart Search, the natural-language company search RevenueBase customers use to build their own targeted lists and unlock verified emails and direct dials at the companies on them. How these lists are built and judged.

How to read this list HQ checked on every row RevenueBase Smart Search rating on every row Refreshed Sep 17, 2026 86% judged on-target in blind review

122Companies

1,843Contacts tracked

802Verified emails

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The 25 largest insulation contractors based in Ireland

Ranked by team size

Top 25 of 122 insulation contractors based in Ireland, ranked by team size, largest first. Data refreshed Sep 17, 2026. RevenueBase Smart Search rates how each company's information relates to insulation contractors: strong evidence (its own description names it), partial (names part of it), indirect (matched on the rest of its profile rather than the description shown). Click a contact count to view that company's people.
#	Company	RevenueBase Smart Search	Headquarters	Employees	Contacts
1	Kingspan Group	Indirect evidence	Kingscourt, IrelandHQ checked Sep 17, 2026	10001+	931 contacts →
	Indirect evidence “At Kingspan, we're on a mission to transform the built environment through inspiration, innovation and insight.” Source: RevenueBase Database · checked Sep 17, 2026
2	Energystore	Partial evidence	Holywood, IrelandHQ checked Sep 17, 2026	51-200	44 contacts →
	Partial evidence “Energystore is rethinking construction with free-flowing insulation.” Source: RevenueBase Database · checked Sep 17, 2026
3	Ecological Building Systems	Indirect evidence	Athboy, IrelandHQ checked Sep 17, 2026	51-200	36 contacts →
	Indirect evidence “Ecological Building Systems was set up in Athboy, County Meath in the UK division was established in 2007 and is based near Carlisle in Cumbria.” Source: RevenueBase Database · checked Sep 17, 2026
4	Fireseal	Partial evidence	Dublin 12, IrelandHQ checked Sep 17, 2026	51-200	29 contacts →
	Partial evidence “Established in 1988, Fireseal is one of Ireland’s leading contractors and suppliers of passive fire protection solutions.” Source: RevenueBase Database · checked Sep 17, 2026
5	Tennants Building Products	Indirect evidence	IrelandHQ checked Sep 17, 2026	11-50	21 contacts →
	Indirect evidence “Tennants Building Products is part of the Tennants Group of Companies, which was originally founded in 1797.” Source: RevenueBase Database · checked Sep 17, 2026
6	House 2 Home Retrofit LTD	Indirect evidence	Dublin 12, IrelandHQ checked Sep 17, 2026	11-50	20 contacts →
	Indirect evidence “House 2 Home has been Ireland's leading 'one stop shop' for energy upgrades since 2013.” Source: RevenueBase Database · checked Sep 17, 2026
7	A&l Electrical LTD	Partial evidence	Dublin 9, IrelandHQ checked Sep 17, 2026	51-200	18 contacts →
	Partial evidence “A&L ELECTRICAL LTD is an Electrical Contractors company based out of MCE House, Unit C8 Santry Business Park, Santry, Dublin 9.” Source: RevenueBase Database · checked Sep 17, 2026
8	Ashgrove Ireland	Indirect evidence	Dublin City, IrelandHQ checked Sep 17, 2026	11-50	16 contacts →
	Indirect evidence “Ashgrove Ireland has 3 companies Ashgrove Mechanical Services ltd Ashgrove Fire Proofing ltd Ashgrove Facilities ltd” Source: RevenueBase Database · checked Sep 17, 2026
9	AF Construction LTD	Partial evidence	Rathcoole, IrelandHQ checked Sep 17, 2026	51-200	15 contacts →
	Partial evidence “AF Construction Ltd provides Main Contractor & expert carpentry services to Ireland's leading developers.” Source: RevenueBase Database · checked Sep 17, 2026
10	Breffni Insulation	Partial evidence	Kilnaleck, IrelandHQ checked Sep 17, 2026	11-50	14 contacts →
	Partial evidence “Breffni Insulation was founded in 2006 and the company is registered and compliant with standards as per the National Standards Authority of Ireland (NSAI), Sustainable Energy…” Source: RevenueBase Database · checked Sep 17, 2026
11	Isopartner Technical Insulation Solutions LTD	Indirect evidence	Ballycoolin, IrelandHQ checked Sep 17, 2026	51-200	13 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 17, 2026
12	Cooper Insulation LTD	Indirect evidence	Kells, IrelandHQ checked Sep 17, 2026	11-50	12 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 17, 2026
13	Envirobead LTD	Indirect evidence	Cork, IrelandHQ checked Sep 17, 2026	11-50	9 contacts →
	Indirect evidence “Your #OneStopShop SEAI approved specialists with complete home energy upgrade solutions.” Source: RevenueBase Database · checked Sep 17, 2026
14	EMF Controls LTD	Partial evidence	Clonmel, IrelandHQ checked Sep 17, 2026	11-50	8 contacts →
	Partial evidence “An electrical contractor founded in 2018, specialising in all aspects of commercial, industrial and domestic electrical works.” Source: RevenueBase Database · checked Sep 17, 2026
15	Eurospec Insulation, Drywall & Facades	Partial evidence	Drogheda, IrelandHQ checked Sep 17, 2026	11-50	7 contacts →
	Partial evidence “Eurospec Insulation, Drywall & Facades is a leading independent distributor of thermal and acoustic insulation, fire protection and Drywall materials, and Facades, from well-known…” Source: RevenueBase Database · checked Sep 17, 2026
16	Altherm ICF	Indirect evidence	Santry, IrelandHQ checked Sep 17, 2026	1-10	7 contacts →
	Indirect evidence “The Altherm ICF System is a modern method of construction that helps you to build better, more comfortable and energy-efficient homes, faster.” Source: RevenueBase Database · checked Sep 17, 2026
17	Ecofix Limited	Strong evidence	Dublin 14, IrelandHQ checked Sep 17, 2026	51-200	6 contacts →
	Strong evidence “Ireland's leading specialist Contractor- External Wall Insulation & Facades - SFS - Airtightness - Internal Plastering - External Plastering - Deep Retrofit - Shallow Retrofit” Source: RevenueBase Database · checked Sep 17, 2026
18	Emco Projects	Indirect evidence	Clane, IrelandHQ checked Sep 17, 2026	11-50	6 contacts →
	Indirect evidence “EMCO has been supplying and installing Insulated panels and doors to the Irish Market since 1998.” Source: RevenueBase Database · checked Sep 17, 2026
19	Castleforms LTD	Indirect evidence	Co. Laois, IrelandHQ checked Sep 17, 2026	11-50	6 contacts →
	Indirect evidence “Castleforms Ltd is a manufacturer of high-quality Expanded Polystyrene (EPS) insulated products and systems that are used in the new build sector based in Portlaoise, Co.” Source: RevenueBase Database · checked Sep 17, 2026
20	IPS COR Services Limited	Partial evidence	Dublin, IrelandHQ checked Sep 17, 2026	51-200	6 contacts →
	Partial evidence “Experienced and trusted supplier of industrial insulation, ventilation and scaffolding solutions along with manpower services.” Source: RevenueBase Database · checked Sep 17, 2026
21	Southern Building Products LTD	Indirect evidence	Dublin, IrelandHQ checked Sep 17, 2026	11-50	6 contacts →
	Indirect evidence “Southern Building products offer Ireland's most comprehensive range of ventilation products, providing quality solutions for eaves, slate, tile and ridge, as well as full range of…” Source: RevenueBase Database · checked Sep 17, 2026
22	Energy Saver Insulations	Partial evidence	Dublin, IrelandHQ checked Sep 17, 2026	1-10	6 contacts →
	Partial evidence “At Energy Saver Insulation (ESI), we are committed to helping you save money through our technical expertise and Industry Knowledge.” Source: RevenueBase Database · checked Sep 17, 2026
23	HI Therm Homes	Indirect evidence	Co Laois, IrelandHQ checked Sep 17, 2026	11-50	5 contacts →
	Indirect evidence “Precast concrete manufacturer & installer of highly insulated structures for residential homes” Source: RevenueBase Database · checked Sep 17, 2026
24	GMD Engineering Services LTD	Partial evidence	Clontarf, IrelandHQ checked Sep 17, 2026	11-50	5 contacts →
	Partial evidence “GMD Engineering Services Ltd are an Electrical Contractor involved in Industrial, Commercial and Residential Developments, The Directors at GMD have a combined construction…” Source: RevenueBase Database · checked Sep 17, 2026
25	Kingdom Installation LTD	Indirect evidence	Abbeydorney, IrelandHQ checked Sep 17, 2026	11-50	4 contacts →
	Indirect evidence “AWARD winning Kingdom Installation Ltd is a privately owned company with over 20 years’ experience in the supply and installation of energy efficiency solutions to the Domestic…” Source: RevenueBase Database · checked Sep 17, 2026

RevenueBase Smart Search

RevenueBase Smart Search assesses information from a company’s LinkedIn profile, information supplied directly by the company, its website, and other publicly available sources. It uses that information to rate how closely the company relates to this list’s category: insulation contractors. Every row carries its rating and the description the rating was read from, so each one can be checked rather than taken on trust.

Strong evidence: The company's own public description of its business names insulation contractors.
Partial evidence: Its own public description names part of insulation contractors, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name insulation contractors. The match rests on the rest of the company's public profile rather than the one sentence quoted here, so this is the rating to check first.

RevenueBase Smart Search is how these lists are built: RevenueBase's data engine and AI assemble the companies that match a category defined in a user's own words, so a list can be about what companies actually do rather than about whichever industry code they were filed under.

Showing 25 of 122 insulation contractors based in Ireland

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Insulation contractors based in Ireland at a glance

As of Sep 17, 2026

43.5%Verified-email coverage

15.1Average contacts per company

11-50Median size (employees)

10.7%Largest-city concentration · Dublin

Sep 17, 2026Page data refreshed

Companies by employee count

1-10

11-50

51-200

201-500

10001+

Email recency for this list is measured worldwide rather than for Ireland, so it is reported there. Company counts and contact totals on this page are exact for Ireland, over 122 companies.

How this list was built

Company categories are rarely black and white. RevenueBase reads each company's own description of its business to decide whether it belongs among insulation contractors, so some rows will be adjacent to the category rather than pure plays. The description and RevenueBase Smart Search rating on every row are there so you can check each match yourself.

Source: The RevenueBase company graph: 60 million companies and 398.9 million professional contacts resolved from primary sources, queried with RevenueBase Smart Search, the natural-language company search available to every RevenueBase user.
What qualifies: Companies headquartered in Ireland whose own description of what they do matches “insulation contractors”. Matching reads each company's description, not its industry code or its name.
RevenueBase Smart Search: RevenueBase Smart Search is how this list is assembled and how each row is rated. RevenueBase's data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to a category defined in a user's own words. Each row is rated strong evidence (its own description names insulation contractors), partial evidence (it names part of the category) or indirect evidence (the description shown names none of it and the match rests on the rest of the company's profile). The description supporting each rating is quoted on the row.
What we exclude: Companies whose own description does not clearly place them among insulation contractors, and records with no verified work email. Companies headquartered outside Ireland are excluded even when they keep an office there.
Match quality: In blind human judging of this matching method, 86% of matched companies were on target. Expect roughly 1 in 7 rows to be adjacent to the category rather than a pure play. Every row shows the company's own description and its RevenueBase Smart Search rating so you can judge each match yourself. Read the full methodology: how the lists are built, how the judging worked, and what the figure means.
Ranking: Team size, largest first: companies are ordered by the number of professionals RevenueBase tracks at each one. Employee ranges shown are reported bands, for context.
Verification: Every listed company carries at least one verified work email, 802 across the full list. Contacts re-verify on a rolling cadence, and each contact's own verification date is shown inside RevenueBase.
Refresh: This page's figures were pulled from the company graph on September 17, 2026. Lists refresh periodically as the graph is re-checked.
Corrections: Wrong category, wrong headquarters, or a company that has closed? Use “Report an issue” on any row. Reports go to the RevenueBase Data Team and feed back into the company graph.

Frequently asked

What is RevenueBase Smart Search?

RevenueBase Smart Search is how RevenueBase decides which companies belong on this list and how strongly each one fits. Its data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to the category the list is about. Each row is rated strong evidence when the company's own description names insulation contractors, partial evidence when it names part of the category, and indirect evidence when the description shown names none of it and the match rests on the rest of the company's profile.

How many insulation contractors are there based in Ireland?

RevenueBase identified 122 insulation contractors headquartered in Ireland as of September 2026, matched on each company's own description of what it does rather than its industry code.

What is the largest company on this list?

Kingspan Group, headquartered in Kingscourt, tops this list with the largest team on record.

Which city has the most insulation contractors?

Dublin leads with 13 headquartered companies, followed by Cork (4) and Limerick (3).

How do I get contact information for these companies?

A free RevenueBase account lets you run this exact search and work the top results, verified emails and direct dials included. Upgrading unlocks all 802 verified decision-maker contacts tracked across these 122 companies.

How current is this list?

The list refreshes periodically as the company graph is re-checked. This page's figures were pulled on September 17, 2026.

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About this data

RevenueBase is a B2B data infrastructure company. Its company graph covers 60 million companies and 398.9 million professional contacts, with emails verified on a rolling cadence rather than scraped once and left to decay. These company lists are generated directly from that graph with RevenueBase Smart Search, the same natural-language company search every RevenueBase user has: describe a market in plain words, get the companies that match, and add verified emails and direct dials for the people at them. It is the same data that powers RevenueBase's B2B data products, and a free account includes 500 credits to start. How these lists are built and judged.