What SULKO does

SULKO s.r.o. is a privately held, family-owned Czech manufacturer of windows and doors, founded in 1993 by Libor Suchánek in Rovensko and now headquartered in Zábřeh, Czech Republic. The company produces PVC, composite (ARTEVO), aluminum and wooden window and door systems at manufacturing facilities in Zábřeh and Šumperk, with 251–500 employees. Its technology stack centres on REHAU-supplied polymer profiles (RAU-FIPRO X for ARTEVO), a newly installed Rotox BSA 240 automated machining centre, a semi-automated PVC production line, and proprietary invisible-joint manufacturing technology introduced in 2025; flagship performance claim is a Uf value of 0.988 W/m²-K on its insulated base profile and up to 76% heating-cost reduction with ARTEVO composites. The firm operates an integrated direct-to-consumer model combining physical showrooms (SULKO Galerie in Zábřeh, SULKO Exclusive in Prague), an online configurator and Shopify e-shop, field-sales representatives for in-home measurement, and participation in the Czech New Green Savings (NZÚ) subsidy programme to finance customer purchases; complementary revenue lines include installation/assembly services, after-sales maintenance and a 20-year warranty programme, plus sub-brands in garage doors, shading, facade systems, fire protection and photovoltaic installations (SULKO Fotovoltaika). Customers are predominantly residential (single-family, apartment, and panel building renovations) with secondary segments in commercial/administrative buildings and schools; the company sells primarily in the Czech Republic and exports to Belgium and Switzerland. Leadership transitioned in 2016 from founder Libor Suchánek to his son Petr Suchánek, and the firm is a member of the international Family Business Network with TÜV SÜD ISO 9001/14001/45001 certifications and a REHAU supplier certification valid through November 2027.

Name

SULKO

Legal name

Sulko, s.r.o.

Website

https://sulko.cz

Company type

Private

Founded year

1993

Operating status

Operating

Headcount range

251–500 employees

Short description

SULKO is a Czech family-owned manufacturer (founded 1993, headquartered in Zábřeh) producing PVC, composite, aluminum and wooden windows and doors for residential, commercial and educational customers in the Czech Republic, Belgium and Switzerland through showrooms, online configurator, field sales and NZÚ government-subsidy partnership.

Ownership category

akta.pro rank

Headquarters

HQ city

Zabreh

HQ country

Czechia

HQ region

Europe

Offices5 records

Markets served

GTM type

B2C

Offering type

Hardware or Manufacturing

Cost components

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

Revenue model

1. Window and Door Sales: One-time sale of windows and doors in PVC, composite, aluminium, and wood materials. Revenue generated from product sales with optional installation services.
2. Installation and Assembly Services: Professional installation by SULKO-certified teams, including delivery and post-installation adjustment within 6 months.
3. After-sales Services: Post-warranty paid services, maintenance, repair, and adjustment services; extended 20-year warranty programme.
4. Specialty Products: Garage doors, shading technology (interior and exterior), facade systems, fire protection systems, and photovoltaic solutions.

Pricing tiers

Go-to-market motion2 records

Distribution channels5 records

Marketing channels5 records

Core offering

SULKO is a Czech family-owned manufacturer of plastic (PVC), composite, aluminum, and wooden windows and doors, plus complementary products such as garage doors, shading technology, facade systems, and photovoltaic solutions. The company operates its own automated production facilities in Zábřeh and Šumperk and serves both residential and commercial customers with professional consultation, installation, and after-sales services.

Product overview

SULKO is a Czech family-owned manufacturer producing windows and doors since 1993. The product portfolio spans four main material types: plastic (PVC), composite, aluminum, and wood. Core products include windows (Okna) in all four materials, doors (Dveře) in plastic, aluminum, and wood, plus garage doors (Garážová vrata). Complementary offerings include interior and exterior shading technology (Stínící technika), facade systems, internal constructions, and fire protection systems. The premium ARTEVO composite line combines aluminum aesthetics with plastic functionality using RAU-FIPRO X material. SULKO also offers related brands: SULKO Fotovoltaika for solar systems, SULKO Exclusive for premium showrooms, and an e-commerce store. Production facilities are located in Zábřeh with ongoing automation investments including the new Rotox BSA 240 machining center.

Differentiator

Problem solved

Functional benefit

Brands

• SULKO Fotovoltaika: Photovoltaic systems and solar panel installations
• SULKO Exclusive
• SULKO E-shop

Products and services

• Plastic Windows (Plastová okna) PVC window systems manufactured in-house with emphasis on high thermal insulation, long lifespan, and modern design for new builds and renovations. Includes SULKO Classic and SYnego product lines.
• Composite Windows - ARTEVO (Kompozitní okna) Premium ARTEVO composite window system combining aluminum aesthetics with plastic functionality. Uses RAU-FIPRO X material for high rigidity, top-tier thermal insulation, modern design, and can reduce heating costs by up to 76%. Made with recycled components.
• Aluminum Windows (Hliníková okna) Aluminum window systems including OptimAL, MB-104, MB-79N, and MB-86N series. Offers sleek profiles, modern design, and high durability for residential and commercial projects.
• Wooden Windows (Dřevěná okna)

Quantifiable outcome

• Up to 76% reduction in heating costs with ARTEVO composite windows
• +1 more outcomes

Named customers1 record

Segments3 records

Ideal customer profiles2 records

Technology focussed Yes

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature5 records

Partnerships

Three partnerships are on record, tiered core and minor.

• REHAUcoreTechnology or IntegrationREHAU is a key materials supplier for SULKO, providing polymer-based profile systems for windows and doors. SULKO holds a supplier certification from REHAU, valid until November 2027, confirming quality standards in their supply chain.
• SUNWINminorOthersSUNWIN shares the internal whistleblower reporting system with SULKO, as both companies are part of the same corporate group or closely related business entities.
• Government Subsidy Programme (NZÚ)coreStrategic or Co-development PartnerSULKO participates in the New Green Savings (Nová zelená úsporám) and New Green Savings LIGHT government subsidy programmes, helping customers obtain financial support for window replacements and energy-efficient renovations up to CZK 1,000,000.

Scale indicators6 records

Recent moves15 records

Expansion highlights6 records

Emerging players

• Aluprof: Polish aluminum systems manufacturer with growing footprint in Central Europe. Comparable to SULKO's aluminum windows and facade systems, with strong regional presence in adjacent markets.
• ALUKÖNIGSTAHL: Austrian aluminum systems partner (Schüco distributor) producing premium architectural windows and facades. Comparable to SULKO's aluminum division serving commercial and high-end residential projects.

Broad incumbents

• Schüco: German global leader in aluminum and steel window, door, and facade systems. Overlaps with SULKO's aluminum and facade offerings; broader portfolio and international scale position it as a broad incumbent competitor.
• VEKA: German PVC profile manufacturer supplying window fabricators globally. Comparable to SULKO through partnership dynamics and as a potential upstream competitor in PVC window systems.
• REHAU Windows: German polymer-based profile supplier and increasingly a window system provider. Both a critical supplier and a competitor to SULKO, with broader global reach and R&D scale.

Direct peers

• Finstral: South Tyrolean family-owned window and door manufacturer producing PVC, aluminum, and wood systems across Europe. Comparable to SULKO in family-owned heritage, multi-material offering, and European mid-market positioning.
• Reynaers Aluminium: Belgian aluminum window, door, and facade system manufacturer with strong presence across Europe. Comparable to SULKO's aluminum division (OptimAL, MB-86N series) and target segments including residential and commercial construction.
• Window Holding: Czech window and door manufacturer with multi-brand portfolio (Vekra, Windowstar, Others). Directly comparable as a domestic Czech competitor in PVC and aluminum windows serving the same end market.
• Internorm: Austria's largest window manufacturer producing PVC, aluminum, and wood-aluminum window and door systems for European markets. Directly comparable to SULKO in product range, customer base (residential renovators and new-build), and family-owned heritage.

Regional players

• OKNA Macek: Czech regional window manufacturer specializing in PVC and aluminum products. Comparable to SULKO in product line and domestic Czech market, though smaller in scale.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat5 records

Key risks6 records

Key highlights7 records

Customer concentration

• Facebookfacebook.com/sulkocz
• LinkedInlinkedin.com/company/sulko
• Instagraminstagram.com/sulko

Compliance8 records

Revenue estimate

Valuation estimate

Number of profiles

Profiles2 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 SULKO