Company lists · Data refreshed September 2026

Top 25 Weatherization companies based in Belgium

Name: Weatherization companies based in Belgium
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 22, 2026 240 companies tracked

RevenueBase identified 240 weatherization companies headquartered in Belgium as of September 2026 and tracks 793 professional contacts across them, including 247 with verified work emails. Wommelgem is the largest hub.

This list covers weatherization companies headquartered in Belgium, 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

240Companies

793Contacts tracked

247Verified emails

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The 25 largest weatherization companies based in Belgium

Ranked by team size

Top 25 of 240 weatherization companies based in Belgium, ranked by team size, largest first. Data refreshed Sep 22, 2026. RevenueBase Smart Search rates how each company's information relates to weatherization 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	Goessens	Indirect evidence	Hannut, BelgiumHQ checked Sep 22, 2026	51-200	31 contacts →
	Indirect evidence “Goessens est une société spécialisée dans l'installation de systèmes de chauffage, de ventilation et de climatisation.” Source: RevenueBase Database · checked Sep 22, 2026
2	QUITO	Indirect evidence	Noville-les-bois, BelgiumHQ checked Sep 22, 2026	1-10	27 contacts →
	Indirect evidence “Quito existe pour offrir une solution coordonnée aux propriétaires cherchant à améliorer la performance énergétique de leur bien le plus simplement et esthétiquement possible afin…” Source: RevenueBase Database · checked Sep 22, 2026
3	Ecopuur	Indirect evidence	9850, BelgiumHQ checked Sep 22, 2026	11-50	23 contacts →
	Indirect evidence “Ecopuur bekijkt het verbruikspatroon van je huidige of nieuwe woning.” Source: RevenueBase Database · checked Sep 22, 2026
4	Telcom	Indirect evidence	Hulshout, BelgiumHQ checked Sep 22, 2026	51-200	23 contacts →
	Indirect evidence “Telcom is een bedrijf dat zich op vlak van de energie- en nutsvoorziening een specialist kan noemen.” Source: RevenueBase Database · checked Sep 22, 2026
5	Soltis	Indirect evidence	Evere, BelgiumHQ checked Sep 22, 2026	11-50	23 contacts →
	Indirect evidence “Soltis est une entreprise créée en 2008 qui accompagne professionnels et particuliers dans la mise en place de solutions vertes et rentables avec un seul but: améliorer…” Source: RevenueBase Database · checked Sep 22, 2026
6	Techem Belgium - Caloribel	Indirect evidence	Sint-jans-molenbeek, BelgiumHQ checked Sep 22, 2026	51-200	18 contacts →
	Indirect evidence “Europees leider in energiebeheer Techem, opgericht in 1962, is een Duitse groep die wereldwijd bekend is bij mede-eigenaren en sociale verhuurders op het gebied van energiebeheer.” Source: RevenueBase Database · checked Sep 22, 2026
7	Isolution	Indirect evidence	Namur, BelgiumHQ checked Sep 22, 2026	11-50	17 contacts →
	Indirect evidence “ISOLUTION est une société spécialisée dans l'isolation et la ventilation de bâtiment pour particuliers et professionnels, et ce depuis plus de 12 ans Aujourd'hui, Isolution compte…” Source: RevenueBase Database · checked Sep 22, 2026
8	Metubel	Indirect evidence	Strépy-bracquegnies, BelgiumHQ checked Sep 22, 2026	51-200	17 contacts →
	Indirect evidence “Metubel est une société spécialisée dans la pose et le raccordement des différentes énergies pour les particuliers et les entreprises.” Source: RevenueBase Database · checked Sep 22, 2026
9	Alfasun	Indirect evidence	Ninove, BelgiumHQ checked Sep 22, 2026	11-50	17 contacts →
	Indirect evidence “nergie zonder zorgen Ga je bouwen?” Source: RevenueBase Database · checked Sep 22, 2026
10	Bondec BV	Indirect evidence	Wommelgem, BelgiumHQ checked Sep 22, 2026	11-50	16 contacts →
	Indirect evidence “Bondec bvba is een gerenommeerd installatiebedrijf sinds 1969.” Source: RevenueBase Database · checked Sep 22, 2026
11	Isolteam	Indirect evidence	Kortemark, BelgiumHQ checked Sep 22, 2026	51-200	13 contacts →
	Indirect evidence “Isolteam, met vestigingen in Kortemark, Hoboken en Denderleeuw, beschikt over een dynamische ploeg van meer dan 75 bedreven experten, zowel op vlak van studie als van uitvoering.” Source: RevenueBase Database · checked Sep 22, 2026
12	VDB Engineering	Indirect evidence	Mechelen, BelgiumHQ checked Sep 22, 2026	11-50	11 contacts →
	Indirect evidence “Bewust omgaan met energie is voor zowel bedrijven als particulieren een hot topic.” Source: RevenueBase Database · checked Sep 22, 2026
13	Benotec	Indirect evidence	Mechelen, BelgiumHQ checked Sep 22, 2026	11-50	11 contacts →
	Indirect evidence “Beter renoveren of BENOveren doe je samen met BENOTEC.” Source: RevenueBase Database · checked Sep 22, 2026
14	CLEYS	Indirect evidence	Waasmunster, BelgiumHQ checked Sep 22, 2026	11-50	9 contacts →
	Indirect evidence “Cleys bv is jouw specialist in energetische renovaties.” Source: RevenueBase Database · checked Sep 22, 2026
15	Dauvister	Indirect evidence	Stavelot, BelgiumHQ checked Sep 22, 2026	51-200	9 contacts →
	Indirect evidence “Dauvister (170+ employees, 30M€ turnover) studies, installs and maintains energy efficency systems for homeowners as well as for large companies.” Source: RevenueBase Database · checked Sep 22, 2026
16	OXIRA	Indirect evidence	Louvain-la-neuve, BelgiumHQ checked Sep 22, 2026	11-50	9 contacts →
	Indirect evidence “Expert en solutions énergétiques, nous offrons une solution complète et sur mesure pour les projets de rénovation durable de nos clients.” Source: RevenueBase Database · checked Sep 22, 2026
17	Bowers	Indirect evidence	Gistel, BelgiumHQ checked Sep 22, 2026	11-50	8 contacts →
	Indirect evidence “BOWERS® creëert doordachte woon- en werkplekken door goed te isoleren, optimaal te ventileren, energiezuinig te verwarmen en alles ‘smart’ op elkaar af te stemmen.” Source: RevenueBase Database · checked Sep 22, 2026
18	SUN ECO	Indirect evidence	Herentals, BelgiumHQ checked Sep 22, 2026	51-200	8 contacts →
	Indirect evidence “Sun Eco is de specialist in uw woning energie efficiënter te maken.” Source: RevenueBase Database · checked Sep 22, 2026
19	Klimaplan	Indirect evidence	Kontich, BelgiumHQ checked Sep 22, 2026	11-50	8 contacts →
	Indirect evidence “KLIMAPLAN is a construction company based out of 83 Blauwesteenstraat, Kontich, Belgium.” Source: RevenueBase Database · checked Sep 22, 2026
20	Optiwatt Scrl	Indirect evidence	Wauthier-braine, BelgiumHQ checked Sep 22, 2026	1-10	7 contacts →
	Indirect evidence “Intéressé par- L'optimisation de vos ressources énergétiques- L'amélioration du confort de vos bâtiments- La valorisation de votre patrimoine immobilier- La maîtrise de vos coûts…” Source: RevenueBase Database · checked Sep 22, 2026
21	Neltane	Indirect evidence	Charleroi, BelgiumHQ checked Sep 22, 2026	1-10	6 contacts →
	Indirect evidence “NELTANE is a construction company specialised in HVAC and Natural insulation based in Charleroi, Belgium.” Source: RevenueBase Database · checked Sep 22, 2026
22	Isoleaz	Indirect evidence	Kraainem, BelgiumHQ checked Sep 22, 2026	1-10	6 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 22, 2026
23	Group Globe	Indirect evidence	Diepenbeek, BelgiumHQ checked Sep 22, 2026	11-50	5 contacts →
	Indirect evidence “Group Globe bevat drie deelbedrijven, die elk focussen op oplossingen omtrent renovatie en/of energiebesparing.” Source: RevenueBase Database · checked Sep 22, 2026
24	Isolblow	Indirect evidence	Aalter, BelgiumHQ checked Sep 22, 2026	1-10	5 contacts →
	Indirect evidence “Isolblow is een moderne en familiale KMO, gespecialiseerd in ecologische isolatietechnieken.” Source: RevenueBase Database · checked Sep 22, 2026
25	Prolectro	Indirect evidence	Beernem, BelgiumHQ checked Sep 22, 2026	11-50	5 contacts →
	Indirect evidence “PROlectro is a construction company, specialized in electrical and HVAC installations, lighting, renewable energy.” 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: weatherization 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 weatherization companies.
Partial evidence: Its own public description names part of weatherization companies, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name weatherization 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 240 weatherization companies based in Belgium

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Weatherization companies based in Belgium at a glance

As of Sep 22, 2026

31.1%Verified-email coverage

3.3Average contacts per company

1-10Median size (employees)

1.7%Largest-city concentration · Wommelgem

Sep 22, 2026Page data refreshed

Companies by employee count

1-10

178

11-50

51-200

Email recency for this list is measured worldwide rather than for Belgium, so it is reported there. Company counts and contact totals on this page are exact for Belgium, over 240 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 weatherization 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 Belgium whose own description of what they do matches “weatherization 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 weatherization 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 weatherization companies, and records with no verified work email. Companies headquartered outside Belgium 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, 247 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 weatherization 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 weatherization companies are there based in Belgium?

RevenueBase identified 240 weatherization companies headquartered in Belgium 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?

Goessens, headquartered in Hannut, tops this list with the largest team on record.

Which city has the most weatherization companies?

Wommelgem leads with 4 headquartered companies, followed by Aalter (3) and Arendonk (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 247 verified decision-maker contacts tracked across these 240 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.