Company lists · Data refreshed September 2026

Top 25 Weatherization contractors based in Belgium

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

Compiled by the RevenueBase Data Team Data refreshed Sep 19, 2026 86 companies tracked

RevenueBase identified 86 company matches for weatherization contractors associated with Belgium as of September 2026 and tracks 432 professional contacts across them, including 128 with verified work emails. Liege is the largest hub.

This list covers company matches for weatherization contractors associated with Belgium, found by RevenueBase SmartSearch using the meaning of business descriptions in its company graph at Exact. Ranked by professionals tracked, largest first. Rows show recorded descriptions where available, Exact search membership and the snapshot date. Data refreshed September 19, 2026.

Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase SmartSearch, 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 RevenueBase SmartSearch · Exact Recorded Sep 19, 2026 How this list was built

86Companies

432Contacts tracked

128Verified emails

Explore this list → Free signup · no credit card · 500 free credits

The 25 largest weatherization contractors based in Belgium

Ranked by team size

Top 25 of 86 company matches for weatherization contractors based in Belgium, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Sep 19, 2026. The RevenueBase SmartSearch column shows Exact match membership in this saved search. Click a contact count to view that company's people. Totals use company locations recorded by RevenueBase; the displayed preview is a smaller selection.
#	Company	RevenueBase SmartSearch	Headquarters	Employees	Contacts
1	Reno Energy	Exact match	Liège (angleur), BelgiumHQ recorded Sep 19, 2026	51-200	106 contacts →
	Exact match “Reno Energy est une entreprise spécialisée dans le secteur de la rénovation énergétique mais aussi dans la nouvelle construction.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
2	QUITO	Exact match	Noville-les-bois, BelgiumHQ recorded Sep 19, 2026	1-10	27 contacts →
	Exact match “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…” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
3	Ecopuur	Exact match	9850, BelgiumHQ recorded Sep 19, 2026	11-50	23 contacts →
	Exact match “Ecopuur bekijkt het verbruikspatroon van je huidige of nieuwe woning.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
4	Isolution	Exact match	Namur, BelgiumHQ recorded Sep 19, 2026	11-50	17 contacts →
	Exact match “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…” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
5	Alfasun	Exact match	Ninove, BelgiumHQ recorded Sep 19, 2026	11-50	17 contacts →
	Exact match “nergie zonder zorgen Ga je bouwen?” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
6	Isolteam	Exact match	Kortemark, BelgiumHQ recorded Sep 19, 2026	51-200	13 contacts →
	Exact match “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.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
7	VDB Engineering	Exact match	Mechelen, BelgiumHQ recorded Sep 19, 2026	11-50	11 contacts →
	Exact match “Bewust omgaan met energie is voor zowel bedrijven als particulieren een hot topic.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
8	Benotec	Exact match	Mechelen, BelgiumHQ recorded Sep 19, 2026	11-50	11 contacts →
	Exact match “Beter renoveren of BENOveren doe je samen met BENOTEC.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
9	Bouw & Energie Advies By Studibo	Exact match	Genk, BelgiumHQ recorded Sep 19, 2026	11-50	10 contacts →
	Exact match “Bij B-EA (Bouw & Energie Advies) ondersteunen we bouwheren, architecten en ontwikkelaars met praktisch energieadvies voor nieuwbouw- en renovatieprojecten.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
10	CLEYS	Exact match	Waasmunster, BelgiumHQ recorded Sep 19, 2026	11-50	9 contacts →
	Exact match “Cleys bv is jouw specialist in energetische renovaties.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
11	Bowers	Exact match	Gistel, BelgiumHQ recorded Sep 19, 2026	11-50	8 contacts →
	Exact match “BOWERS® creëert doordachte woon- en werkplekken door goed te isoleren, optimaal te ventileren, energiezuinig te verwarmen en alles ‘smart’ op elkaar af te stemmen.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
12	Klimaplan	Exact match	Kontich, BelgiumHQ recorded Sep 19, 2026	11-50	8 contacts →
	Exact match “KLIMAPLAN is a construction company based out of 83 Blauwesteenstraat, Kontich, Belgium.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
13	Neltane	Exact match	Charleroi, BelgiumHQ recorded Sep 19, 2026	1-10	6 contacts →
	Exact match “NELTANE is a construction company specialised in HVAC and Natural insulation based in Charleroi, Belgium.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
14	Isolblow	Exact match	Aalter, BelgiumHQ recorded Sep 19, 2026	1-10	5 contacts →
	Exact match “Isolblow is een moderne en familiale KMO, gespecialiseerd in ecologische isolatietechnieken.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
15	ONIS	Exact match	Etterbeek, BelgiumHQ recorded Sep 19, 2026	1-10	4 contacts →
	Exact match “Onis est une entreprise spécialisée dans la rénovation énergétique des bâtiments à Bruxelles.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
16	Casquo Bvba	Exact match	Waregem, BelgiumHQ recorded Sep 19, 2026	1-10	3 contacts →
	Exact match “energieverslaggeving veiligheidscoördinatie bouwbegeleiding bouwexpertise BlowerDoor keuring privé riolering” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
17	Isoprotect	Exact match	Brussels, BelgiumHQ recorded Sep 19, 2026	1-10	3 contacts →
	Exact match Recorded description not available. Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
18	A2 Conseils	Exact match	Habay, BelgiumHQ recorded Sep 19, 2026	1-10	3 contacts →
	Exact match Recorded description not available. Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
19	Eltherm NV	Exact match	Kampenhout, BelgiumHQ recorded Sep 19, 2026	11-50	2 contacts →
	Exact match “Eltherm is specialist in isolatie sinds 1974, van dak tot kelder, zowel bij renovatie als nieuwbouw.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
20	House UP SRL	Exact match	Schaerbeek, BelgiumHQ recorded Sep 19, 2026	1-10	2 contacts →
	Exact match “L’enveloppe extérieure de votre bâtiment va jouer un rôle clé dans l’isolation thermique et est votre meilleure alliée pour éviter les ponts thermiques et différentes déperditions…” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
21	Favor Cool	Exact match	Dilsen-stokkem, BelgiumHQ recorded Sep 19, 2026	1-10	2 contacts →
	Exact match Recorded description not available. Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
22	Nomatec Services	Exact match	Antwerp, BelgiumHQ recorded Sep 19, 2026	1-10	2 contacts →
	Exact match “Nomatec Services heeft jarenlange ervaring in huis op het gebied van energie en comfort.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
23	Vrintec	Exact match	Antwerp, BelgiumHQ recorded Sep 19, 2026	1-10	1 contacts →
	Exact match “Particulieren en bedrijven kunnen bij Vrintec terecht voor de installatie van zonnepanelen en alle aannemingswerken in elektriciteit en ventilatie.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
24	Applis Bvba	Exact match	Tongerlo, BelgiumHQ recorded Sep 19, 2026	1-10	1 contacts →
	Exact match “Applis – vloer- en dakisolatie Je vloer of (plat) dak (laten) isoleren?” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
25	Premium Energy	Exact match	Genk, BelgiumHQ recorded Sep 19, 2026	1-10	1 contacts →
	Exact match “Premium Energy is een Warmtepompen / Airconditioning installateur in Houthalen.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase

RevenueBase SmartSearch

Describe a niche business in your own words. RevenueBase SmartSearch compares the meaning of your description with company business descriptions compiled in the RevenueBase company graph. Exact, Similar, Related and Broad control how closely companies must fit.

This list uses Exact for “weatherization contractors”. Each Exact match badge shows membership in that saved search; it is not an individual similarity score or a service-quality rating. Recorded descriptions are shown where available.

Showing 25 of 86 weatherization contractors based in Belgium

See the full list, filter by size, metro and specialty, and access 128 tracked professional contacts with verified work emails. Direct dials are available where recorded.

Free signup · no credit card

View the full list →

Weatherization contractors based in Belgium at a glance

As of Sep 19, 2026

29.6%Verified-email coverage

5.0Average contacts per company

1-10Median size (employees)

3.5%Largest-city concentration · Liege

Sep 19, 2026Page data refreshed

Companies by employee count

1-10

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 86 companies.

How this list was built

The recorded descriptions help you assess these company matches. Check a company’s website for its current services and locations.

Source: The RevenueBase company graph: 60 million companies and 398.9 million professional contacts resolved from primary sources, queried with RevenueBase SmartSearch, the natural-language company search available to every RevenueBase user.
What qualifies: Company records associated with Belgium whose business descriptions match “weatherization contractors” by meaning at the Exact setting. Descriptions are compiled in the RevenueBase company graph from public websites, profiles and company information where available; they are not guaranteed quotations from the company's website.
RevenueBase SmartSearch: Describe a niche company in your own words to find businesses by meaning. Exact, Similar, Related and Broad control the breadth of RevenueBase SmartSearch. This saved list uses Exact. Each row's Exact match badge shows inclusion in that search, not an individual score or a service-quality judgment.
Public preview: The public preview omits records without a verified work email. Where headquarters information is recorded, preview rows are also filtered to this page’s location. Dataset totals and geographic summaries describe the full matched records before these preview filters.
Match quality: RevenueBase's August 25, 2026 study assessed 4,198 description/company pairs across matching settings. The publisher reports 86% good or better at Exact. This evaluates the method across queries; it does not audit this individual list. Recorded company descriptions, where available, help you judge each match yourself. Read the full methodology: how the lists are built and what the study measures.
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 displayed company carries at least one verified work email. RevenueBase tracks 128 professional contacts with verified work emails across the full matched dataset. 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 19, 2026. Lists refresh periodically as the graph is re-checked.
Record context: Company records and descriptions can change. Check the company's website for its current services and locations.

Frequently asked

What is RevenueBase SmartSearch?

RevenueBase SmartSearch finds niche companies by the meaning of their business descriptions in the RevenueBase company graph. Exact, Similar, Related and Broad control how closely companies must fit your description. This list uses Exact for “weatherization contractors”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many weatherization contractors are there based in Belgium?

RevenueBase identified 86 company matches for weatherization contractors associated with Belgium as of September 2026, using the meaning of business descriptions at Exact. This is the recorded matched set in the RevenueBase company graph.

What is the largest company on this list?

Reno Energy tops the displayed preview by professional contacts tracked in RevenueBase. Recorded headquarters appear in the company rows.

Which city has the most weatherization contractors?

Liege leads with 3 company records, followed by Mechelen (3) and Brussels (3).

How do I get contact information for these companies?

A free RevenueBase account lets you run this exact search and work limited free results with 500 credits to start. Upgrading provides access to the 128 professional contacts with verified work emails tracked across these 86 companies; direct dials are available where recorded.

How current is this list?

The list refreshes periodically as the company graph is re-checked. This page's figures were pulled on September 19, 2026.

Ready to reach these companies? Verified emails and direct dials for all 86 weatherization contractors based in Belgium. Start with a free account, no credit card.

Download this list →

Related lists

Weatherization contractors by geography

Browse the directory

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 SmartSearch, 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.