SKK Kozijnwacht

What SKK Kozijnwacht does

SKK Kozijnwacht B.V. is a Dutch specialist service organization founded in 1991 and headquartered in Assen, Netherlands, that performs repair, preventive maintenance, planned maintenance, and energy-efficient upgrading of existing plastic (PVC/Kunststof), aluminum, and wooden window and door frames including their integrated hardware and multi-point locking systems. The company operates merkonafhankelijk (brand-independently) and is positioned as onderdeel van Schücco Global Services, drawing on the Schücco group's window technology expertise. Its service portfolio is organized into three core offerings — Dagelijks onderhoud (daily repairs with same-day emergency response), Preventief onderhoud (3-year preventive inspection cycles), and Planmatig onderhoud (planned maintenance and revitalization projects) — supplemented by sub-products including kozijnrevitalisering, Circulair glas, HR++ glass upgrades, kierdichting, and hardware service.

SKK generates revenue through three streams: transaction-based one-time repairs (priced at €126.88 start tariff plus €26.88 per quarter hour per technician, with material pass-through), recurring subscription contracts structured as four graduated tiers (Type A through D, billed annually or multi-year on 3-year maintenance cycles), and professional-services planned-maintenance projects for housing corporations and contractors. The company sells primarily through direct enterprise field sales to Dutch woningcorporaties, contractors, VvEs, and building owners, with an additional self-serve online channel for individual consumers. Pricing for business contracts is publicly disclosed and indexed annually via BDB-indexering.

The company maintains a national service network with a central service office in Assen and regional offices in Hoogeveen, Nijkerk, Lijnden, Oosterhout, and Rotterdam, deploying over 100 self-employed technicians and approximately 160 own technicians to deliver 112,500 annual home visits. Key technology assets include iPad-based digital planning and work administration for technicians and automated nightly restocking of service van inventory. SKK operates an internal Vakschool using a master-journeyman training principle, holds VCA** safety certification and KWH quality certification, and carries Siegenia and ROTO hardware certifications. It serves customers across social housing (Rochdale, Groninger Huis, Acantus, Welbions, Lefier, and others), construction (Jorritsma Bouw, Van Wijnen, Hegeman, Hemubo, Dijkstra Draisma, Caspar de Haan, Coen Hagedoorn, Rutges Vernieuwt), property management, healthcare, education, hospitality, and individual homeowners.

Name

SKK Kozijnwacht

Legal name

SKK Kozijnwacht BV

Website

https://skk.nl

Company type

Private

Founded year

1991

Operating status

Operating

Headcount range

51–100 employees

Short description

SKK Kozijnwacht is a Dutch national service organization specializing in repair, preventive maintenance, and energy-efficient upgrading of existing plastic, aluminum, and wooden window and door frames for housing corporations, contractors, VvEs, building owners, and individuals across the Netherlands.

Ownership category

akta.pro rank

Product category

Window Frame Maintenance Services

SIC

Construction - Special Trade Contractors (1700), Services-Miscellaneous Repair Services (7600)

akta.pro primary industry

Window Sash, Frame & Wood Rot Repair (HSAGABAD)

akta.pro secondary industries

Renovation, Remodeling & Tenant Improvements (General Contracting) (IMAFAAAE), Small Exterior Repairs (Trim, Fascia, Soffit, Siding Patches) (HSAGAAAJ)

Keywords

• Window frame maintenance
• Door repair services
• Preventive maintenance
• Glazing services
• Hardware repair

Headquarters

HQ city

Assen

HQ country

Netherlands

HQ region

Europe

Offices6 records

Markets served

GTM type

B2B and B2C

Offering type

Services

Cost components

Personnel, Operations, Technology or R&D, Marketing or Sales

Revenue model

1. Kozijnreparatie (One-time Repairs): Individual repair requests for homeowners, housing corporations, and property managers. Charged per service visit with hourly labor rates per quarter hour. One-time service option available for customers not on maintenance contracts.
2. Onderhoudsovereenkomst (Maintenance Contracts): Recurring maintenance subscriptions with cycles of 3 years. Types A through D available, ranging from service-only agreements to comprehensive coverage including all labor and materials. Monthly or annual billing options. Includes periodic inspections, maintenance visits, and preferential repair rates for contract holders.
3. Planmatig Onderhoud (Planned Maintenance Projects): Large-scale maintenance and improvement projects for housing corporations and contractors, often involving energy efficiency upgrades, window revitalization, and multi-property programs.

Pricing tiers

Go-to-market motion1 record

Distribution channels3 records

Marketing channels4 records

Core offering

SKK Kozijnwacht specializes in the repair, maintenance, and upgrading of plastic (kunststof), aluminium, and wooden window and door frames. The company provides daily repairs, preventive maintenance, and planned maintenance services to housing corporations, contractors, building owners, VvE's, and private individuals across the Netherlands. Services include frame revitalization, hardware repair, glazing upgrades (HR++ and circular glass), ventilation grille cleaning, and seal improvement.

Product overview

SKK Kozijnwacht operates as a national service organization offering a unified service platform for window frame maintenance and repair, encompassing three core service offerings: Dagelijks onderhoud (daily maintenance for quick repairs), Preventief onderhoud (preventive maintenance with 3-year inspection cycles), and Planmatig onderhoud (planned maintenance for long-term quality). These services cover all window frame materials (plastic/UPVC, aluminum, and wood) and are delivered through brand-independent expertise. The offering portfolio includes specialized sub-products such as Kozijnrevitalisering (window revitalization), Circulair glas (circular glass up to 95% CO2 reduction), HR++ glass upgrades, Kierdichting (draft sealing), and Hang- en sluitwerk service (hardware). For business clients, four levels of Onderhoudsabonnement (maintenance subscription) contracts (Types A through D) provide graduated coverage from basic service rates to complete cost-free repairs. The company also operates an internal Vakschool (vocational school) for training technicians.

Differentiator

Problem solved

Functional benefit

Products and services

• Dagelijks onderhoud Day-to-day repair service for window and door frames, available to all customer segments to address ad-hoc issues and damage.
• Preventief onderhoud Scheduled preventive maintenance service designed to extend window and door frame lifespan and prevent costly future repairs.
• Planmatig onderhoud Planned multi-year maintenance programs for large property portfolios, including advisory and execution of scheduled upkeep.
• Kozijnrevitalisering Frame revitalization service that restores and renews the appearance and functionality of existing window and door frames.
• HR++ glas Insulating glass upgrade service replacing existing glazing with energy-efficient HR++ glass to improve thermal performance.
• Circulair glas Circular glass replacement service focused on sustainable, reusable glass solutions for window frames.
• Hang- en sluitwerk service Repair and replacement service for hinges, locks, and closing mechanisms on window and door frames.
• Ventilatierooster reiniging Cleaning service for ventilation grilles integrated in window frames to maintain proper airflow and indoor air quality.
• Kierdichting Sealing and draught-proofing service for window and door frames to improve energy efficiency and prevent air leakage.

Quantifiable outcome

• 8 out of 10 complaints resolved in first visit (80% first-time fix rate)
• +5 more outcomes

Named customers24 records

Segments8 records

Ideal customer profiles5 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature3 records

Partnerships

16 partnerships are on record, tiered core, major, notable and minor.

• Schüco Global ServicescoreStrategic or Co-development PartnerAs onderdeel van (as part of) Schüco Global Services, SKK can draw on broad expertise in window technology and innovation. Schüco is a major manufacturer of window and facade systems, and this relationship provides SKK with deep technical knowledge and support.
• Jorritsma BouwmajorStrategic or Co-development PartnerLong-term construction partner on multiple major renovation and sustainability projects including Elkien (338 homes Sneek), Lefier Stadskanaal (120 homes), and Lefier Hoogkerk (103 homes). SKK functions as specialist window frame partner within Jorritsma's construction teams.
• HemubomajorStrategic or Co-development PartnerContractor partner working with SKK on Rochdale projects in Amsterdam. Successfully collaborated on 55-home upgrade project at Gerenstein-Gallery, Bijlmerdreef.
• Dijkstra DraismamajorStrategic or Co-development PartnerBouwgroep (construction group) described as one of the best-performing construction companies nationally. Partner on Lefier renovation of 144 apartments in Groningen Indische buurt.
• Hegeman BouwgroepmajorStrategic or Co-development PartnerConstruction partner on Welbions circular glass project in Hengelo (156 homes, 102 with circular glass). SKK provided expertise that helped Hegeman win the contract through innovative circular glass proposal.
• Caspar de HaanmajorStrategic or Co-development PartnerBouwgroep (construction group) partner on Het Woonbedrijf renovation project in Eindhoven (204 homes). SKK provided preventive maintenance on Kunststof frames as part of nature-inclusive renovation including bird and bat nesting solutions.
• Rutges VernieuwtnotableStrategic or Co-development PartnerConstruction company providing testimonial citing SKK as reliable partner for quality work: 'SKK biedt kwaliteit en heeft laten zien dat ze een betrouwbare partner zijn. Bij hen wordt het in principe in één keer goed gedaan.'
• QbuildnotableStrategic or Co-development PartnerConstruction partner providing testimonial: 'De samenwerking met SKK is echt voortreffelijk. De communicatie loopt altijd soepel. Alles wordt snel en goed geregeld.' Worked with on Eigen Haard projects.
• Coen Hagedoorn BouwgroepnotableStrategic or Co-development PartnerConstruction partner on Eigen Haard sustainability projects. Quote: 'Wat mij altijd opvalt aan de monteurs van SKK is dat ze echt mensgericht zijn.'
• Smits VastgoedzorgnotableStrategic or Co-development PartnerProperty management company collaborating on Trivire care home renovation in Dordrecht. Quote: 'De monteurs van SKK werken zelfstandig en klantgericht. Ze zorgen dat alles in één keer goed wordt afgehandeld.'
• KranendonknotableStrategic or Co-development PartnerPartner on Accolade project in Heerenveen (110 homes) for frame upgrading.
• VvE MeteanotableStrategic or Co-development PartnerLong-term partnership (15+ years) with VvE Metea through framework agreement (raamovereenkomst) for periodic inspections and maintenance of Kunststof, wooden, and aluminium frames on 3-year cycle.
• VvE Diensten NederlandminorChannel Partner/ Reseller/ DistributorVvE services company that coordinates and represents VvE Dassenlaan in Hilversum for SKK's revitalization project.
• PropertyNextminorChannel Partner/ Reseller/ DistributorProperty management company that engaged SKK for leakage repair and energy savings work at UWV Venlo.
• Willems VastgoedonderhoudnotableStrategic or Co-development PartnerProperty maintenance company partnering on Woonstad Rotterdam project (Jalontorens) and De Leeuw van Putten renovation (152 homes).
• Talen VastgoedonderhoudnotableStrategic or Co-development PartnerProperty maintenance company collaborating on Accolade project (70 homes) with SKK.

Scale indicators8 records

Recent moves7 records

Expansion highlights4 records

Broad incumbents

• Facilicom Group: Dutch facility services group (with brands like Trigion and Incluzio) providing multi-disciplinary building maintenance to corporate, public, and housing-sector clients, including window and facade repair scopes.
• Van Wijnen: Large Dutch construction group with a renovation and maintenance division that delivers window, facade, and envelope upgrades. Competes for the same housing-corporation maintenance contracts that anchor SKK's revenue, but at broader portfolio scale.
• Dura Vermeer: Established Dutch contractor offering renovation, maintenance, and asset management for residential and commercial portfolios. Overlaps with SKK on planned maintenance of building envelopes for institutional clients.
• ISS A/S: Global facility services provider with significant Dutch presence delivering building maintenance including envelope-level repairs. Competes for multi-trade facility maintenance contracts where SKK currently provides specialist window services.

Direct peers

• Hegeman Bouwgroep: Dutch construction group active in renovation, maintenance, and energy retrofits for housing corporations (e.g., Welbions circular glass). Competes with SKK as a specialty trade partner on planmatig onderhoud frameworks.
• Hemubo: Dutch specialized renovation and maintenance contractor active in social-housing frame and facade work. They both partner with SKK on Rochdale projects and would compete head-to-head for similar planmatig onderhoud tenders with housing corporations.
• Caspar de Haan Bouwgroep: Mid-sized Dutch contractor delivering complex renovation projects for housing corporations (e.g., Het Woonbedrijf Eindhoven). Competes for similar window-frame maintenance and sustainability upgrade scopes often in partnership-or-competition with SKK.
• Jorritsma Bouw: Northern-Netherlands general contractor that subcontracts frame work to SKK but also self-performs renovation scopes for housing corporations (Elkien, Lefier, Welbions). Competes with SKK on integrated multi-trade renovation bids, sometimes as partner, sometimes as competitor.

Emerging players

• Reynaers Aluminium: European aluminium window systems manufacturer with a service and renovation arm. SKK is brand-independent, which directly positions it against manufacturer-affiliated service offerings like Reynaers' in-house maintenance network.

Others

• Geze Benelux: Manufacturer of door and window hardware (closers, drives, lock systems) with associated service offerings. Adjacent enabler rather than direct competitor, but its service capability competes for some of the same hang-en-sluitwerk maintenance budgets SKK addresses.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat5 records

Key risks6 records

Key highlights7 records

Customer concentration

• Facebookfacebook.com/SKK-Kozijnwacht-100038803466176
• LinkedInlinkedin.com/company/skk-b-v-

Compliance3 records

Revenue estimate

Valuation estimate

Number of profiles

Profiles10 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 SKK Kozijnwacht