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We develop innovative and sustainable aluminium solutions for curtain walls, doors and windows. Each project we complete we look to increase the architectural value and improve peoples working and home surroundings. We complete each project with the most sustainable components which are lightweight, strong & infinitely recyclable.


The environment is naturally a topic of immense discussion with climate change driving legislation that will improve insulation in both domestic and commercial properties. At Harefield Improvements we take our environmental responsibilities very seriously and this extends right through our processes from manufacturing through to on site installation.

Energy Ratings

We also organise training events and workshops to provide trade customers with the tools and skills to actively sell Energy Efficient products. Harefield Improvements has not restricted Energy Efficiency to just windows and doors. We have embraced new energy efficient products such as a solar thermal system which supply all the hot at our head office. As a company Harefield Improvements has embraced energy efficiency as a philosophy as part of our environmental commitment (demonstrated by the companys ISO 14001 Environmental Accreditation), from installing energy efficient sensor-driven lighting throughout the factory and offices (saving approximately 9.7 tonnes of Co2 per year) to upgrading machines and equipment to more energy efficient versions.