Isotosi Ag

What Isotosi Ag does

Isotosi SA is a Swiss specialty distributor of roofing, waterproofing, insulation, and building envelope materials, headquartered in Sierre, Canton Valais, and operating under sole ownership of Christophe Tosi since its founding in 1982. The company offers an 18-category product catalog covering waterproofing membranes, mineral wool and rigid foam insulation, metal and tile roofing systems, facade cladding, solar roofing and PV components, roof safety and fall protection, drainage and ventilation, acoustic solutions, translucent elements, terrace supports, green roof systems, vapor barriers, fasteners and adhesives, protective layers, tools, and clearance stock — sourced from a dense network of European brand partners including Prefa, Swisspor, INNOTECH, Bauder AG, Knauf Insulation, Sika, Foamglas, Velux, Zinco, 3S Solar, and Soltop.

The business runs a sales-led go-to-market anchored by professional contractor relationships, supplemented by direct customer pickup at the Sierre site and a proprietary eGate e-commerce platform that supports self-serve ordering for both trade and private customers. Pricing is transaction-based: established trade accounts receive invoiced terms, new customers prepay, and private customers receive proforma invoices; in-store pickup supports cash, card, PostFinance, and Twint payments. The company also provides technical advisory and consultation services supporting product selection and installation guidance.

Isotosi employs 11–50 people and markets itself as the Valais specialist for energy-efficient building projects, while distributing nationally and sourcing some articles directly from EU-based suppliers. There are no disclosed funding events, no parent company, and no institutional ownership; revenue is not publicly disclosed.

Name

Isotosi Ag

Legal name

isotosi sa

Website

https://isotosi.ch

Company type

Private

Founded year

1982

Operating status

Operating

Headcount range

11–50 employees

Short description

Isotosi SA is a Swiss specialty distributor in Sierre, Valais, supplying roofing, waterproofing, insulation, facade, solar, and safety products from major European brands to professional contractors and private customers via direct sales and its eGate e-commerce platform.

Ownership category

akta.pro rank

Headquarters

HQ city

Sierre

HQ country

Switzerland

HQ region

Europe

Offices1 record

Markets served

GTM type

B2B

Offering type

Hardware or Manufacturing

Cost components

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

Revenue model

1. Building Materials Distribution: Isotosi SA generates revenue through the wholesale and retail distribution of roofing materials, waterproofing systems, insulation products, solar coverage solutions, facade materials, and related building envelope components. They sell to both professional contractors and private customers via their e-commerce platform and direct sales.
2. Professional Services & Consultation: The company provides advisory services for product selection and technical support for their product range, serving as a consultant for roofing and building envelope solutions.

Pricing tiers

Go-to-market motion2 records

Distribution channels3 records

Marketing channels6 records

Core offering

Isotosi Ag distributes roofing, waterproofing, insulation, facade, solar roofing, drainage, acoustic, and roof safety products from major European brands to professional contractors and private customers in Switzerland. The company operates an eGate e-commerce platform alongside a physical Sierre showroom and provides technical advisory services for energy-efficient building envelope projects.

Product overview

Isotosi SA is a Swiss roofing and building materials specialist based in Sierre, Valais, operating an e-commerce platform (eGate eShop) alongside a comprehensive product catalog. The offering is organized as a broad portfolio of product categories spanning waterproofing (Étanchéité), insulation (Isolation/Dämmung), roofing (Couverture/Bedachung), facade cladding (Revêtement Façade/Fassade), solar roofing (Couverture Solaire/Solarabdeckung), roof safety systems (Système de Sécurité/Sicherheits-System), drainage and gutters, acoustic solutions, translucent elements, terrace support systems, green roof vegetation systems, vapor barriers and adhesives, fasteners and coatings, and protective separation layers. The product range also includes clearance items and tools. Products are distributed across numerous branded partners including Prefa, Swisspor, Innotech, Bauder, Sika, Knauf Insulation, Foamglas, Velux, Soltop, 3S Solar, Zinco, and many others. The portfolio is structured as a catalog of material categories and sub-categories sold primarily to professional trade customers, with an e-commerce platform enabling direct ordering.

Differentiator

Problem solved

Functional benefit

Products and services

• Waterproofing Systems (Étanchéité / Abdichtung) Waterproofing solutions including bitumen membrane systems, synthetic flat roof membranes, liquid plastic coatings (PU and PMMA resins), and underlayment/underlayer membranes for roofs, sold to professional contractors and private builders.
• Insulation Products (Isolation / Dämmung) Comprehensive insulation product range covering mineral wool, polystyrene (XPS, EPS, graphitized EPS), polyurethane/PIR boards, foam glass, multi-layer panels, wood fiber insulation, blow-in insulation products, and vacuum aerogel panels for thermal building envelope applications.
• Roofing Materials (Couverture / Bedachung) Roofing materials including Prefa metal roofing and facade systems, fiber cement coverings, roof tile coverings (clay tiles, concrete tiles), natural/vegetative roof coverings, and related accessories for construction professionals.
• Facade Cladding (Revêtement Façade / Fassade) Facade cladding and exterior wall covering systems for buildings, supplied to construction professionals and private renovators.
• Solar Roofing Solutions (Couverture Solaire / Solarabdeckung) Solar roofing solutions including photovoltaic modules and accessories, electrical components, inverters and batteries, electric vehicle chargers, and Prefa Solar integrated systems for building-integrated photovoltaics.
• Roof Safety Systems (Système de Sécurité / Sicherheits-System) Roof safety and fall protection systems including posts, hooks, anchor points, cable lifeline systems, barrier systems, ladder safety, personal protective equipment, and installation/mounting services.
• Drainage and Gutter Systems (Drainage - Caniveaux / Drainage - Rinnen) Drainage and gutter systems including rainwater channels, grates and joint profiles, and related drainage solutions for roofs and terraces.
• Roof Drains, Overflows and Ventilation Components Roof drains, overflow outlets, swan neck vents, and ventilation components for roof drainage and airflow systems.
• Acoustic Building Solutions (Acoustique / Akustik) Building acoustic solutions including resonance/reverberation treatment, impact sound insulation, airborne sound insulation, and loose-fill acoustic granulates for building envelope and interior applications.
• Translucent Elements (Élément Translucide / Lichtdurchlässige Elemente) Daylighting and translucent building elements for natural light transmission through roofs and facades.
• Terrace Support Systems and Accessories Elevated terrace support systems (Stelzlager) and accessories for outdoor floor installations on rooftops and terraces.
• Green Roof and Vegetation Systems (Végétalisation / Begrünung) Green roof systems and vegetation solutions for planted and living roof installations, supplied in partnership with Zinco.
• Vapor Barriers, Adhesive Tapes and Primers Vapor barriers, adhesive tapes, and primer products for building envelope sealing applications.
• Fasteners, Adhesives and Coatings (Fixations - Colles - Enduits) Mechanical fasteners, structural adhesives, and finishing compounds/coatings for construction applications, including products from Sika.
• Tools and Miscellaneous Equipment (Outillage + Divers) Construction tools and equipment including bitumen cookers, torches/burners, accessories, and general workshop items, including products from Leister.
• eGate eShop Online Ordering Platform Proprietary online e-commerce platform enabling professional contractors and private customers to browse, order, and purchase Isotosi's roofing and construction material portfolio with account management, order tracking, and payment processing.

Segments2 records

Ideal customer profiles2 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Partnerships

17 partnerships are on record, tiered core and minor.

• PrefacoreOthersMajor brand partner supplying aluminum roofing and facade products. Products include Prefa Solar integrated solar solutions for roofing applications.
• SwissporcoreOthersKey insulation products supplier offering comprehensive thermal insulation solutions.
• INNOTECH (Innotech)coreOthersSafety systems specialist for roofing, offering fall protection barriers and security systems. Featured supplier with dedicated product focus.
• SagerminorOthersBuilding materials supplier for specialized construction products.
• Bauder AGcoreOthersLeading waterproofing and roof insulation specialist offering bituminous membranes and synthetic solutions.
• SoltopcoreOthersSolar energy solutions partner specializing in solar mounting systems and components.
• IsocellminorOthersInsulation products supplier focusing on natural and sustainable insulation materials.
• Knauf InsulationcoreOthersMajor international insulation manufacturer supplying mineral wool and related insulation products.
• SikacoreOthersGlobal specialty chemicals company supplying sealants, adhesives, and waterproofing solutions.
• FoamglasminorOthersPremium insulation manufacturer supplying foam glass insulation products.
• VeluxminorOthersDaylight and fresh air solutions supplier for roof windows and skylights.
• NelskampcoreOthersRoof tile manufacturer offering concrete and clay tiles. Stock availability maintained at Sierre and Rothrist locations.
• ZZ Zürcher ZiegeleienminorOthersSwiss brick manufacturer supplying clay roof tiles and related products.
• ZincocoreOthersGreen roof and roof garden systems specialist for roof greening and vegetation solutions.
• ReversewebminorOthersWebsite development and digital services partner credited for website creation.
• 3S SolarcoreOthersSwiss solar solutions provider offering photovoltaic modules and integrated solar products.
• LeisterminorOthersProfessional welding and roofing equipment manufacturer for tool applications.

Scale indicators1 record

Recent moves6 records

Expansion highlights5 records

Emerging players

• Hornbach Baumarkt AG: European DIY and home improvement retailer with a strong Swiss store network, stocking roofing, insulation, and building materials for both trade and self-build customers — overlaps with Isotosi's B2C private customer segment at the broader retail layer.
• Bauhaus AG: Pan-European home improvement and DIY specialist with extensive building materials assortment including roofing and insulation — broader retail-oriented model that overlaps with Isotosi's B2C private customer channel at a national scale.

Broad incumbents

• Holcim Ltd: Swiss-headquartered global building materials giant offering solutions and products across roofing systems, insulation, and building envelope — far larger and broader than Isotosi, but directly overlaps in roofing and construction materials supply to the Swiss market.
• Sika AG: Swiss-listed global specialty chemicals company that manufactures sealants, adhesives, waterproofing, and roofing systems — a core supplier brand to Isotosi but also a much larger incumbent competing for direct contractor relationships in waterproofing.

Regional players

• Hagebau Handelsgesellschaft für Baustoffe mbH & Co. KG: German building materials cooperative and one of Europe's largest specialist trade distributors of construction materials including roofing, insulation, and facade systems — comparable operating model but primarily German geography.

Others

• Velux Group: Danish manufacturer of roof windows and skylights, currently a strategic supplier partner to Isotosi — comparable in addressing the roofing and daylighting category but operating as a manufacturer rather than distributor.
• Hilti AG: Liechtenstein-headquartered manufacturer of professional construction tools, fasteners, and installation systems — adjacent to Isotosi's roofing distribution scope through tools and fasteners (Leister being a similar supplier brand), but sells direct to trades.

Direct peers

• Bauking AG: German specialty building materials distributor operating a multi-branch network focused on roofing, insulation, drywall, and building envelope products for trade customers — same core distribution model as Isotosi but at larger German scale.
• Berner Group: European B2B wholesale distributor specializing in construction, installation, and maintenance supplies sold through direct sales and digital channels to trade professionals — closely analogous multi-channel, advisor-led distribution model.
• Saint-Gobain Distribution Suisse (LARIB Distribution): Saint-Gobain's Swiss wholesale distribution arm (LARIB) distributes building materials, insulation, roofing, and interior products to contractors and tradespeople across Switzerland — a directly comparable specialty distributor with substantially larger scale and broader national footprint.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat4 records

Key risks4 records

Key highlights6 records

Customer concentration

• YouTubeyoutube.com/channel/UC_X21Mld8ZxpVqlGUHOKOKA
• LinkedInlinkedin.com/company/isotosi-sa

Revenue estimate

Valuation estimate

Number of profiles

Profiles1 record

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 Isotosi Ag