Company lists · Data refreshed September 2026

Top 25 Thermal insulation companies based in Ireland

Name: Thermal insulation companies based in Ireland
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 22, 2026 71 companies tracked

RevenueBase identified 71 thermal insulation companies headquartered in Ireland as of September 2026 and tracks 1,508 professional contacts across them, including 733 with verified work emails. Dublin is the largest hub.

This list covers thermal insulation companies 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 22, 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 22, 2026 86% judged on-target in blind review

71Companies

1,508Contacts tracked

733Verified emails

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The 25 largest thermal insulation companies based in Ireland

Ranked by team size

Top 25 of 71 thermal insulation companies based in Ireland, ranked by team size, largest first. Data refreshed Sep 22, 2026. RevenueBase Smart Search rates how each company's information relates to thermal insulation companies: 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 22, 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 22, 2026
2	Energystore	Partial evidence	Holywood, IrelandHQ checked Sep 22, 2026	51-200	44 contacts →
	Partial evidence “Energystore is rethinking construction with free-flowing insulation.” Source: RevenueBase Database · checked Sep 22, 2026
3	Ecological Building Systems	Indirect evidence	Athboy, IrelandHQ checked Sep 22, 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 22, 2026
4	Breffni Insulation	Partial evidence	Kilnaleck, IrelandHQ checked Sep 22, 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 22, 2026
5	Isopartner Technical Insulation Solutions LTD	Indirect evidence	Ballycoolin, IrelandHQ checked Sep 22, 2026	51-200	13 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 22, 2026
6	Cooper Insulation LTD	Indirect evidence	Kells, IrelandHQ checked Sep 22, 2026	11-50	12 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 22, 2026
7	Eurospec Insulation, Drywall & Facades	Strong evidence	Drogheda, IrelandHQ checked Sep 22, 2026	11-50	7 contacts →
	Strong 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 22, 2026
8	Altherm ICF	Indirect evidence	Santry, IrelandHQ checked Sep 22, 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 22, 2026
9	Emco Projects	Indirect evidence	Clane, IrelandHQ checked Sep 22, 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 22, 2026
10	Castleforms LTD	Indirect evidence	Co. Laois, IrelandHQ checked Sep 22, 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 22, 2026
11	IPS COR Services Limited	Partial evidence	Dublin, IrelandHQ checked Sep 22, 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 22, 2026
12	Southern Building Products LTD	Indirect evidence	Dublin, IrelandHQ checked Sep 22, 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 22, 2026
13	Energy Saver Insulations	Partial evidence	Dublin, IrelandHQ checked Sep 22, 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 22, 2026
14	HI Therm Homes	Indirect evidence	Co Laois, IrelandHQ checked Sep 22, 2026	11-50	5 contacts →
	Indirect evidence “Precast concrete manufacturer & installer of highly insulated structures for residential homes” Source: RevenueBase Database · checked Sep 22, 2026
15	Kingdom Installation LTD	Indirect evidence	Abbeydorney, IrelandHQ checked Sep 22, 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 22, 2026
16	Brusna	Partial evidence	Enniscrone, IrelandHQ checked Sep 22, 2026	11-50	4 contacts →
	Partial evidence “Brusna is an SEAI-registered home insulation and retrofitting specialist operating across the North West of Ireland.” Source: RevenueBase Database · checked Sep 22, 2026
17	Passive Sills	Partial evidence	Cork, IrelandHQ checked Sep 22, 2026	11-50	4 contacts →
	Partial evidence “Poly Passive Mouldings is the leading specialist provider of Super Lightweight, Thermally Efficient, & Cost effective Window Sills, Oversills, and Insulated Thresholds Compliant…” Source: RevenueBase Database · checked Sep 22, 2026
18	Innovate Insulation	Partial evidence	Dublin 15, IrelandHQ checked Sep 22, 2026	1-10	4 contacts →
	Partial evidence “Ireland’s top insulation company to insulate commercial, residential, and industrial buildings.” Source: RevenueBase Database · checked Sep 22, 2026
19	Greenland ECO Construction LTD	Partial evidence	Boycetown, IrelandHQ checked Sep 22, 2026	11-50	3 contacts →
	Partial evidence “External Insulation Experts Over 20yrs experience in the building trade We specialise in external insulation and retrofits - Dublin, Kildare and the wider Leinster region.” Source: RevenueBase Database · checked Sep 22, 2026
20	Comfort Solutions Retrofit	Indirect evidence	Newport, IrelandHQ checked Sep 22, 2026	11-50	3 contacts →
	Indirect evidence “We bring warmth, comfort and fresh air to your home or business with a keen emphasis on performance and quality.” Source: RevenueBase Database · checked Sep 22, 2026
21	Complete Insulations	Partial evidence	Lusk, IrelandHQ checked Sep 22, 2026	1-10	3 contacts →
	Partial evidence “Complete Insulations is an Irish owned company with over 15 years in the building industry in Ireland.” Source: RevenueBase Database · checked Sep 22, 2026
22	Modular Panel Systems LTD	Indirect evidence	Mohill, IrelandHQ checked Sep 22, 2026	51-200	2 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 22, 2026
23	Acara Concepts LTD	Partial evidence	Killossery, IrelandHQ checked Sep 22, 2026	1-10	2 contacts →
	Partial evidence “We are suppliers of wood fibre insulation, and natural and sustainable acoustic products.” Source: RevenueBase Database · checked Sep 22, 2026
24	Greinplast Ireland LTD	Indirect evidence	Dublin, IrelandHQ checked Sep 22, 2026	11-50	2 contacts →
	Indirect evidence “We keep your hause warm all the year round!” Source: RevenueBase Database · checked Sep 22, 2026
25	Hastie Insulation	Indirect evidence	Jullianstown, IrelandHQ checked Sep 22, 2026	11-50	2 contacts →
	Indirect evidence “The company was first established in the Republic of Ireland during the 1930's operating from offices in Dublin.” Source: RevenueBase Database · checked Sep 22, 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: thermal insulation companies. 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 thermal insulation companies.
Partial evidence: Its own public description names part of thermal insulation companies, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name thermal insulation companies. 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 71 thermal insulation companies based in Ireland

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Thermal insulation companies based in Ireland at a glance

As of Sep 22, 2026

48.6%Verified-email coverage

21.2Average contacts per company

11-50Median size (employees)

9.9%Largest-city concentration · Dublin

Sep 22, 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 71 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 thermal insulation companies, 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 “thermal insulation companies”. 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 thermal insulation companies), 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 thermal insulation companies, 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, 733 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 22, 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 thermal insulation companies, 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 thermal insulation companies are there based in Ireland?

RevenueBase identified 71 thermal insulation companies 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 thermal insulation companies?

Dublin leads with 7 headquartered companies, followed by Cork (3) and Waterford (2).

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 733 verified decision-maker contacts tracked across these 71 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 22, 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.