DELHEZ Systèmes

What DELHEZ Systèmes does

DELHEZ Systèmes S.A. is a privately held Belgian construction services company headquartered in Thimister (Province of Liège) that has operated since 1996 under a multi-trade residential renovation model. The business is organized into three integrated service divisions: roofing and carpentry (traditional, prefabricated, and custom timber frame roof structures, plus coverings in tiles, slate, zinc, and EPDM); high-performance insulation (cellulose, spray foam, EPS HR++ beads, PIR panels, mineral wool, and polyester) for roofs, walls, floors, cavities, and ventilated voids; and timber frame construction for houses, extensions, house raisings, carports, and pool houses built to the Belgian Q-ZEN nearly-zero-energy standard using PEFC-certified wood. An in-house workshop with a bridge crane and assembly table enables prefabrication of wall panels.

The company generates project-based, individually quoted revenue from residential homeowners, architects, and small property developers across the Province of Liège and the Verviers region. It operates a direct-to-consumer field-sales model: prospective customers contact the company by phone, email, or website, after which a technician conducts a free on-site assessment and delivers a tailored quote; the same firm then executes all three trades with its own personnel, supplemented by ~10 subcontractor partner teams. Revenue is anchored by approved-installer relationships with Velux and Elevate, and by material supplier ties to Neopixels (BASF), Isocell, Knauf Insulation, Rockwool, Unilin, PEG/Ecopeg, and Wienerberger. The company is run by a three-administrator board — Maxime Niselli (Insulation), Jeremy Wiertz (Timber Frame), and Nicolas Delhez (Roofing) — that completed succession from founders Chantal and Luc Delhez in 2024, and employs approximately 20 staff across roofing, insulation, carpentry, technical sales, and administration.

Name

DELHEZ Systèmes

Legal name

Delhez Systemes S.A.

Website

https://delhezsystemes.be

Company type

Private

Founded year

1996

Operating status

Operating

Headcount range

1–10 employees

Short description

DELHEZ Systèmes is a Belgian family-owned construction services firm in Thimister (Province of Liège) that delivers integrated roofing, high-performance insulation, and timber frame construction to residential homeowners and architects using its own crews and approved-installer material partnerships.

Ownership category

akta.pro rank

Product category

Residential Construction Services

NAICS

Roofing Contractors (23816), Residential Remodelers (236118), Roofing Contractors (238160)

SIC

General Bldg Contractors - Residential Bldgs (1520), Asphalt Paving & Roofing Materials (2950)

akta.pro primary industry

Roofing Systems & Waterproofing (Membranes, Shingles, TPO/EPDM, Liquid-Applied) (IMAFAMAA)

akta.pro secondary industries

Residential Design-Build & Renovation-Integrated Builders (IMAFABAE), Soffit, Fascia & Eaves Repair/Replacement (HSAPAKAH), Flat Roof Repair & Membrane Restoration (TPO/EPDM/PVC/Built-Up) (HSAGAKAE)

Keywords

• Roofing services
• Thermal insulation
• Timber frame construction
• Building renovation
• Energy efficient construction

Headquarters

HQ city

Thimister

HQ country

Belgium

HQ region

Europe

Offices1 record

Markets served

GTM type

B2C

Offering type

Services

Cost components

Personnel, Operations, Supply Chain, Marketing or Sales, Technology or R&D, Infrastructure

Revenue model

1. Roofing and timber frame construction services: One-time project-based revenue from roofing renovation, timber frame construction, and related finishing services. Services are provided by the company's own personnel, with quotes generated following on-site technician visits. Revenue is primarily driven by the volume and complexity of construction projects.
2. High-performance building insulation services: Project-based revenue from insulation installation services covering roofs, walls, floors, cavities, and ventilation gaps. Includes insulation of attics, flat roofs, wall cavities, basements, and ventilated gaps using multiple materials (cellulose, spray foam, PIR panels, EPS beads, mineral wool). Services include assistance with government energy subsidy applications.
3. Insulation material supply (ancillary): Incidental supply of insulation materials as part of installation projects. Materials include Isocell cellulose, Neopixels EPS beads, PIR panels, Ecopeg polyester, Supafil mineral wool, and Rockwool stone wool, sourced from partner manufacturers and applied by Delhez teams.

Pricing tiers

Go-to-market motion2 records

Distribution channels3 records

Marketing channels5 records

Core offering

DELHEZ Systèmes provides integrated residential construction services in the Province of Liège across three divisions: roofing (new construction, renovation, tile/slate/zinc/EPDM covering, Velux windows, cladding, cornice woodwork, moss removal), high-performance thermal and acoustic insulation (sprayed foam, blown cellulose, EPS bead injection, PIR panels, mineral wool, polyester), and timber frame construction (Q-ZEN houses, extensions, house raising, carports, pool houses). The company operates a single-interlocutor model where its own trained personnel execute all work and assist customers with Walloon, Flemish, and Brussels government energy subsidy applications.

Product overview

DELHEZ Systèmes operates as a multi-service construction company offering three integrated divisions: roofing (toitures), insulation (isolation), and timber frame construction (ossatures bois). The roofing division covers traditional and prefabricated carpentry, various roof coverings (tiles, slate, zinc, EPDM), Velux window installation, exterior cladding, custom woodwork, and roof maintenance. The insulation division provides comprehensive thermal and acoustic insulation for roofs, walls, floors, ceilings, cavities, and ventilated voids using multiple techniques including sprayed foam, blown-in cellulose, injected EPS beads, and rigid panels. The timber frame division constructs low-energy and passive houses, extensions, building elevations, carports, and pool houses using PEFC-certified wood and bio-sourced cellulose insulation. The company serves the Liège province including Verviers and surrounding areas, operating as an authorized installer for Velux and Elevate (EPDM membranes), and sources insulation materials from Neopixels (BASF), Isocell, and Knauf Insulation.

Differentiator

Problem solved

Functional benefit

Products and services

• Roofing Services (Toitures) Roofing and timber frame services including new roof construction, renovation, repairs, maintenance, carpentry, tile/slate/zinc/EPDM covering, Velux windows, cladding, cornice woodwork, and moss removal for residential buildings in the Province of Liège.
• Thermal & Acoustic Insulation Services (Isolation) High-performance thermal and acoustic insulation services covering roofs, walls, floors, ceilings, cavities, and ventilated voids using multiple techniques including sprayed foam, blown cellulose, injected EPS beads, PIR panels, mineral wool, and polyester. Includes assistance with government energy subsidy applications.
• Timber Frame Construction (Ossatures bois) Timber frame construction services for low-energy and passive houses, extensions, house raising, carports, and pool houses using PEFC-certified wood and cellulose insulation, with new builds designed to Q-ZEN (near-zero energy) standards.
• Attic Conversion Services (Aménagement de combles) Complete attic conversion services including thermal and acoustic insulation, Velux window installation, floor creation, partitions, and finishing work to transform attics into habitable spaces.
• Velux Roof Window Installation Authorized Velux installer providing professional roof window and skylight installation with waterproofing and insulation, using flush-fit installation technique with insulated frame for airtightness and optimized PEB rating.
• Cavity Wall Insulation (Isolation des murs creux) Cavity wall insulation via injection of expanded graphite polystyrene (EPS HR++) beads with aqueous binder, using endoscopic camera diagnosis and minimally invasive 18mm hole technique. Lambda value 0.033 W/mK.

Named customers7 records

Segments3 records

Ideal customer profiles2 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature8 records

Partnerships

Six partnerships are on record, tiered core.

• Neopixels (BASF subsidiary)coreTechnology or Integration · 1 January 2011Delhez Systèmes has chosen to work with Neopixels products (supplied by BASF) for expanded graphite polystyrene (EPS HR++) insulating beads injected into wall cavities. The technique has been proven for over 30 years. Lambda value of 0.033 W/mK.
• IsocellcoreTechnology or Integration · 1 January 2006First Belgian company to import and commercialize the Austrian Isocell brand for cellulose insulation in 2006. Delhez Systèmes has been working with Isocell products since 2004 and uses Isocell cellulose for blown and insufflated insulation in attics, walls, and timber frame structures. The partnership represents a long-term, foundational supplier relationship for the insulation division.
• Knauf Insulation (Supafil range)coreTechnology or Integration · 1 January 2004Delhez Systèmes added Knauf Insulation's Supafil Loft (blown glass wool for attics) and Supafil Timber Frame (blown glass wool for timber frames) to its insulation portfolio in 2017. Belgian-manufactured products used for insulating inaccessible lofts and timber frame structures.
• RockwoolcoreTechnology or IntegrationDelhez Systèmes uses Rockwool stone wool insulation for applications requiring non-combustible thermal insulation: chimney duct casing, communal attic floor insulation (hospitals, schools), wall insulation, and flat roof insulation. Stone wool is 100% recyclable, has excellent acoustic properties, and lasts up to 75 years.
• Unilin InsulationcoreTechnology or IntegrationDelhez Systèmes uses Unilin PIR (polyisocyanurate) rigid panels for post-insulation of wall surfaces, flat roofs, floors, and basement ceilings. PIR panels offer excellent thermal performance with lambda values of 0.022 W/mK and are available in tongue-and-groove profiles.
• VeluxcoreTechnology or IntegrationDelhez Systèmes is an approved Velux installer for roof windows in the Verviers region. The company installs Velux windows using a flush-fit technique with insulated frames, ensuring airtightness, thermal performance, and aesthetic integration.

Scale indicators5 records

Recent moves7 records

Expansion highlights4 records

Broad incumbents

• Knauf Insulation: Major global insulation materials manufacturer (mineral wool, Supafil blown glass wool) that supplies Delhez. Comparable as the upstream incumbent whose products Delhez installs; both serve the same Belgian residential thermal-renovation market.
• ROCKWOOL Belgium: Global stone wool insulation manufacturer with a Belgian presence. Comparable as a supplier of non-combustible insulation (chimney ducts, communal attics, flat roofs) that Delhez specifies; both target the same Q-ZEN / energy-renovation demand pool.
• BMI Group (Monier / Icopal): European roofing and waterproofing systems group (formerly Braas Monier) covering pitched and flat roofs. Comparable as a broad incumbent serving Belgian residential and commercial roofing with competing product lines to Delhez's coverings and EPDM offerings.
• Wienerberger SA/NV: Belgian-headquartered building materials group (clay roof tiles, bricks). Comparable as a long-standing supplier of Delhez roofing materials and as a Belgian incumbent in residential building envelope solutions.
• Isocell GmbH: Austrian manufacturer of cellulose insulation and airtightness systems, and Delhez's foundational supplier since 2004. Comparable as the technology originator whose product line Delhez is the first Belgian importer of; both target timber frame and attic insulation retrofits.
• Unilin Insulation: Belgian PIR rigid insulation panel manufacturer supplying Delhez. Comparable as a domestic incumbent in the same insulation product category and renovation-driven market.
• IKO Belgium: Belgian manufacturer and supplier of roofing membranes, shingles, and insulation products. Comparable as a broad incumbent in the same Belgian pitched and flat-roofing supply chain.
• VELUX Belgium: Global roof window manufacturer with a Belgian subsidiary. Comparable as the brand that Delhez is an approved installer for; both serve the same Belgian residential attic-conversion and roof-renovation market.
• Soprema NV: Belgian subsidiary of Soprema, a major European manufacturer of waterproofing membranes, roof systems, and insulation. Comparable as a broad incumbent in flat-roof waterproofing and building envelope systems, operating in the same Belgian market.

Emerging players

• Roto Frank Belgium: European roof window and loft ladder manufacturer. Comparable as a competing approved-brand alternative to Velux that competes for the same Belgian roof-window installation jobs Delhez performs.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat4 records

Key risks6 records

Key highlights7 records

Customer concentration

• Facebookfacebook.com/delhezsystemes
• LinkedInlinkedin.com/company/delhez-syst%C3%A8mes

Revenue estimate

Valuation estimate

Number of profiles

Profiles8 records

Funding overview

Funding rounds

Investors

Funding detail is available on the Subscription and Enterprise plan.Contact sales →

M&A

Investments

M&A and investment is available on the Subscription and Enterprise plan.Contact sales →

Frequently asked questions about DELHEZ Systèmes