Doldersum achieves certification for ISO 14001, the CO2 Performance Ladder and WEEELABEX

3 November 2026

Following a successful audit by Kiwa, Sloop- en Handelsbedrijf Doldersum B.V., specialized in demolition, metal trading and recycling, has achieved certification for ISO 14001, the CO2 Performance Ladder and WEEELABEX. This marks an important step for the family owned company in Westerhaar-Vriezenveensewijk, Netherlands, as it continues to develop its business and expand its activities.

What are ISO 14001, the CO2 Performance Ladder and WEEELABEX?

The ISO 14001 standard provides an internationally recognized framework for establishing and improving an environmental management system. The CO2 Performance Ladder helps organizations systematically measure and reduce their CO2 emissions and report on their efforts transparently. WEEELABEX sets requirements for the collection, processing and recycling of waste electrical and electronic equipment, helping ensure high quality and responsible treatment of e-waste.

Doldersum has been active for many years in the collection, processing and trading of ferrous and nonferrous metals, cables, batteries, end of life vehicles and other recyclable materials. The company also supplies new metals, such as steel, aluminum and stainless steel, to businesses and individuals. The company works every day to recover valuable raw materials and keep materials available for reuse and recycling.

Certification is a means, not an end

The family owned company is known for its practical approach and direct lines of communication. Brothers Jan and Jan Doldersum have a clear ambition: to develop the business step by step, prepare for future regulatory requirements and remain a reliable, professional partner for customers and supply chain partners. The certifications are not an end in themselves but a means of supporting this ongoing development.

An intensive process

For a relatively small organization, achieving three certifications at the same time was an intensive process. Considerable work was therefore done ahead of the audits to document processes, increase environmental awareness throughout the organization, establish management systems and demonstrate compliance with the requirements of the various standards. Employee commitment played an important role. Throughout the process, Doldersum received support from consulting firm AdbLOM.

ISO 14001 and the CO2 Performance Ladder

With ISO 14001 certification, Doldersum has further embedded its environmental management system and documented how it works to control and improve its environmental performance. Certification for the CO2 Performance Ladder provides insight into energy consumption and CO2 emissions and establishes a basis for further reducing the environmental impact of its operations.

WEEELABEX

WEEELABEX certification also marks an important expansion of the company's activities. This certification enables Doldersum to dismantle and process waste electrical and electronic equipment in a certified manner. This further expands the company's services and allows it to respond to growing demand for high quality processing of electronic equipment and the recovery of valuable raw materials.

A solid foundation

The certifications align with broader developments in the sector, where sustainability, circularity and demonstrable quality are playing an increasingly important role. For Doldersum, they provide a solid foundation for building the future of the family business while staying true to the approach that has made the company successful: practical, reliable and focused on the long term.

More information

Would you like to learn more about Kiwa's sustainability services? Visit our website to discover the value of certification for your organization according to ISO 14001, the CO2 Performance Ladder and WEEELABEX.

Related services:

ISO 14001 Certification: Environmental Management Certification

ISO 14001 provides an internationally recognized framework for establishing an Environmental Management System (EMS). It helps organizations identify and manage environmental impacts, improve resource efficiency, reduce waste and demonstrate a clear commitment to continual environmental improvement.

CO2 Performance Ladder certification – Versions 3.1 and 4.0

The CO2 Performance Ladder helps organizations reduce their CO2 emissions and operate sustainably. With CO2 Performance Ladder certification through Kiwa, you demonstrate that your company actively contributes to the climate transition and you benefit from competitive advantage in public tenders. Both version 3.1 and the renewed version 4.0 are available through Kiwa.

WEEELABEX (Waste of Electric and Electronic Equipment Label of Excellence)

The WEEELABEX quality standard describes the working method for the treatment and processing of discarded electrical and electronic equipment. The acronym WEEELABEX stands for Waste of Electric and Electronic Equipment Label of Excellence.

EED certification and audits for sustainable energy performance

The European Energy Efficiency Directive (EED) requires larger companies in Europe to carry out an energy audit in order to structurally reduce energy consumption and operate more sustainably. An EED audit helps organizations gain insight into their energy consumption and identify cost-effective energy-saving measures, ensuring both legal compliance and financial savings.