Thermilux
Thermilux sprl is a Belgian construction services company based in Bastogne, providing polyurethane foam insulation, humidity treatment, flat roof waterproofing, and facade services to residential and commercial property owners across Wallonia.
- Company typePrivate
- Founded-
- HeadquartersBastogne, Belgium
- Headcount1–10
- GTM typeB2C
- OfferingServices
What Thermilux does
Thermilux sprl is a privately held Belgian construction services firm headquartered in Noville, Bastogne, operating for over 40 years in the Wallonia region. The company delivers three interconnected service lines: insulation (using spray-applied polyurethane foam projection, granule insufflation, and cavity wall injection for thermal, acoustic, and radon-mitigation applications); humidity treatment (addressing infiltration, condensation, rising damp via injected hydrophobic barriers, dry rot/merule fungus remediation, and flat roof waterproofing using Alwitra EVALON/EVALASTIC membranes); and facade services (external insulation via the STO StoTherm Classic system plus hydrophobic facade treatments). The technical backbone rests on specialized application techniques for polyurethane foam — projection, insufflation, and injection — applied across walls, floors, ventilated crawl spaces, roof spaces, wood construction, and interior partitions.
The business operates on a direct-to-customer, sales-led model. Customers request free, customized quotes (devis gratuit) through the company website or by phone, with services priced per project based on surface area (m²) and scope. There is no public pricing, no SaaS or subscription component, and no intermediary or retail channel — the field teams deliver all work directly. Two primary customer segments are served: residential property owners seeking energy efficiency, moisture remediation, and facade upgrades, and commercial building owners requiring building-envelope and waterproofing work. Thermilux's distribution is domestic, single-country, limited to Wallonia.
Material inputs are sourced through exclusive partnerships with three European brand manufacturers: STO (German facade systems, StoTherm Classic), Alwitra (German waterproofing membranes, EVALON/EVALASTIC), and Technichem (damp proofing, Technisil MS Hybrid). These three relationships are described as exclusive ("exclusivement") and represent the company's principal technical supply dependencies. Headcount is stated at 1–10 employees, ownership is private with no parent, subsidiaries, or external investment identified, and revenue is not publicly disclosed.
Thermilux firmographics
Firmographics- Name
- Thermilux
- Legal name
- Thermilux sprl
- Website
- https://thermilux.be
- Company type
- Private
- Operating status
- Operating
- Headcount range
- 1–10 employees
- Short description
- Thermilux sprl is a Belgian construction services company based in Bastogne, providing polyurethane foam insulation, humidity treatment, flat roof waterproofing, and facade services to residential and commercial property owners across Wallonia.
- Ownership category
- akta.pro rank
Thermilux industry classification
Industry- Product category
- Building Insulation Services
- akta.pro primary industry
- Exterior Insulation & Weatherproofing (House Wrap, Air/Water Barriers) (HSAPAKAK)
Keywords
Where Thermilux is headquartered
LocationHeadquarters
- HQ city
- Bastogne
- HQ country
- Belgium
- HQ region
- Europe
Offices1 record
Markets served
Thermilux business model
Business model- GTM type
- B2C
- Offering type
- Services
- Cost components
- Personnel, Supply Chain, Operations, Marketing or Sales
Revenue model
- Insulation Services: Polyurethane foam insulation services including spray application, granule insufflation, and cavity wall injection for residential and commercial buildings. Provides thermal and acoustic insulation solutions.
- Humidity Treatment Services: Treatment services for rising damp, infiltration, condensation, waterproofing, and merule (dry rot) remediation. Includes diagnostic and curative treatments.
- Facade Services: Insulating facade systems and facade hydrophobing treatments for building envelope improvement and energy efficiency.
Pricing tiers
| Model | Billing | Price |
|---|---|---|
| Other | Multi-year contract | Custom project-based pricing |
Go-to-market motion1 record
Distribution channels1 record
Marketing channels2 records
Thermilux product offering
Product offeringCore offering
Thermilux is a Belgian building-services contractor that specializes in thermal insulation of buildings using polyurethane foam (spray, insufflation, and injection) and in diagnosing and treating humidity problems such as rising damp, infiltrations, condensation, and dry rot (mérule). The company also provides facade insulation systems (StoTherm Classic) and flat roof waterproofing for residential homes, commercial buildings, and public-sector properties across Wallonia, Belgium.
Product overview
Thermilux is a construction services company operating for over 40 years in Belgium, specializing in three interconnected service areas: (1) Insulation — covering spray-applied polyurethane foam projection, granule insufflation, and cavity wall injection for walls, floors, lofts, ventilated crawl spaces, wood construction, and radon protection; (2) Humidity treatment — addressing infiltration, condensation, rising damp (via injected hydrophobic barriers using Technichem products), dry rot/merule fungus remediation, and flat roof waterproofing using Alwitra EVALON/EVALASTIC membranes; and (3) Facade services — including insulating facades using the STO StoTherm Classic external wall insulation system (EIFS) and facade waterproofing/hydrophobic treatments. The company also offers free quotes for all services.
Differentiator
Problem solved
Functional benefit
Products and services
- Polyurethane spray insulation Spray-application of polyurethane foam to insulate building surfaces and reduce heat loss; offered to homeowners and commercial building owners in Wallonia.
- Polyurethane insufflation insulation Insufflation of polyurethane foam into wall or roof cavities to improve thermal performance of existing buildings; aimed at residential and small commercial clients in Wallonia.
- Polyurethane injection insulation Injection of polyurethane foam into building elements to provide insulation in cases where spray or insufflation are not suitable; for residential and commercial properties.
- Humidity diagnosis and treatment Inspection and treatment of moisture-related problems in buildings, including rising damp, water infiltration, condensation, and dry rot (mérule); serves homeowners, commercial, and public-sector clients in Wallonia.
- Facade insulation (StoTherm Classic) External facade insulation and finishing using the StoTherm Classic system from STO to improve thermal performance and weatherproofing of facades; for residential, commercial, and public buildings in Wallonia.
- Facade hydrophobing Application of hydrophobic treatments to facades to repel water and protect the building envelope; for residential and commercial properties in Wallonia.
- Flat roof waterproofing Waterproofing of flat roofs using Alwitra membrane products to prevent infiltration and protect the building; serves residential, commercial, and public-sector clients.
Companies that use Thermilux
Customer profileSegments2 records
Ideal customer profiles2 records
Thermilux technology and API
TechnologyTechnology focussed No
API detail
- Has API
- No
- API docs
- API detail
Core technology
AI maturity
App detail
Feature6 records
Thermilux partnerships and signals
Strategic signalPartnerships
Three partnerships are on record, tiered core.
- STOcoreSto SE & Co. KGaA - German manufacturer of facade systems. Thermilux exclusively uses STO products for insulating facade installations, specifically the StoTherm Classic system known for its durability and thermal performance.
- AlwitracoreAlwitra GmbH - German manufacturer of waterproofing membranes. Thermilux exclusively uses EVALON and EVALASTIC membrane systems for flat roof waterproofing applications.
- TechnichemcoreTechnichem - Manufacturer of damp proofing products. Thermilux uses Technichem products, specifically Technisil, for treating rising damp and capillary moisture in building walls.
Scale indicators1 record
Recent moves1 record
Expansion highlights4 records
Thermilux competitors and assessment
Company assessmentBroad incumbents
- Sto SE & Co. KGaA: German manufacturer of the StoTherm Classic facade insulation system that Thermilux exclusively installs. Comparable as the upstream supplier whose EIFS products Thermilux resells and applies to Belgian residential facades.
- Recticel: Belgian-headquartered manufacturer of rigid polyurethane foam insulation boards and building envelope solutions. Serves overlapping end-customers in Belgian insulation and overlaps with Thermilux's polyurethane-based service offering, though at the materials level rather than installation.
- Knauf Insulation: Global manufacturer of mineral wool and other insulation products widely used in Belgian residential insulation projects. Serves the same residential/renovation customer base that Thermilux targets with its polyurethane foam services.
- Rockwool: International manufacturer of stone wool insulation products for buildings. Comparable end-customer overlap with Thermilux's insulation services, particularly in residential renovation and facade applications in Belgium.
- Soprema: Major European manufacturer of waterproofing membranes, insulation, and roofing systems with strong presence in Belgium and France. Directly comparable to Thermilux's Alwitra-based flat roof waterproofing line at a much larger scale.
- IKO: European manufacturer of waterproofing membranes and insulation products with a strong Belgian distribution footprint. Overlaps with Thermilux's flat roof waterproofing and insulation services via its product portfolio for professional installers.
- Kingspan Group: Irish-headquartered global leader in insulated panels, rigid insulation boards, and building envelope solutions. Targets the same Belgian energy-renovation customer with high-performance insulation, though at manufacturing scale rather than local installation.
- Saint-Gobain Weber: European leader in external wall insulation systems (ETICS/EIFS), facade renders, and waterproofing mortars serving the Belgian renovation market. Directly competes with the STO-based facade insulation offering Thermilux installs, but at manufacturer scale.
Direct peers
- Isolat: Belgian specialist in humidity treatment and insulation with a comparable service menu including rising-damp and condensation remediation. Directly overlaps with Thermilux's humidity-treatment and insulation service lines in the Belgian residential market.
Regional players
- Derbigum: Belgian manufacturer and installer of bituminous and synthetic flat roof waterproofing systems. Comparable to Thermilux's flat roof waterproofing service with overlapping customer base across Benelux.
Market position
Strengths4 records
Weaknesses4 records
Competitive moat4 records
Key risks6 records
Key highlights6 records
Customer concentration
Thermilux social profiles
Digital presenceThermilux financial estimates
Financial estimateRevenue estimate
Valuation estimate
Thermilux leadership team
Management profileNumber of profiles
Thermilux funding detail
Funding detailFunding overview
Funding rounds
Investors
Funding detail is available on the Subscription and Enterprise plan.Contact sales →
Thermilux M&A and investment
M&A and investmentM&A
Investments
M&A and investment is available on the Subscription and Enterprise plan.Contact sales →
Frequently asked questions about Thermilux
What does Thermilux do?
Thermilux is a Belgian building-services contractor that specializes in thermal insulation of buildings using polyurethane foam (spray, insufflation, and injection) and in diagnosing and treating humidity problems such as rising damp, infiltrations, condensation, and dry rot (mérule). The company also provides facade insulation systems (StoTherm Classic) and flat roof waterproofing for residential homes, commercial buildings, and public-sector properties across Wallonia, Belgium.
Is Thermilux a public or private company?
Thermilux is a private company. It is classified as founder individual operated bootstrapped and is currently operating.
When was Thermilux founded?
Thermilux was founded in -1. It employs 1 to 10 people.
Where is Thermilux based?
Thermilux is headquartered in Bastogne, Belgium, in the Europe region.
How does Thermilux make money?
Three revenue lines are on record. Insulation Services are the primary driver. The others are humidity Treatment Services and facade Services.
Who are Thermilux's main competitors?
Broad incumbents on record are Sto SE & Co. KGaA, Recticel, Knauf Insulation, Rockwool, Soprema, IKO, Kingspan Group and Saint-Gobain Weber. Isolat is listed as a direct peer. Derbigum is listed as a regional player.
Does Thermilux have an API?
No public API is recorded for Thermilux.
What industry is Thermilux in?
Thermilux's product category is Building Insulation Services. Its primary akta.pro industry code is HSAPAKAK, Exterior Insulation & Weatherproofing (House Wrap, Air/Water Barriers).