WHY CHOOSE AN ENDURANCE INSTALLER. TRUSTED INSTALLER NETWORK MPN WALES. We ARE assessed and monitored as your Installer Network to ensure you get the perfect composite door installation, every time. This means you’ll benefit from the highest standards of professionalism throughout. With Secured by Design and CE certifications, the Endurance design has been refined over the years to deliver what is needed and surpass what is expected from the modern Wales homeowner. The signature Endurance solid timber core is made from 48mm thick, cross-bonded veneered laminate timber. This allows it to be 10% thicker than most composite doors on the market. Investing in premium products does not need to come with extortionate prices, especially when you deal with Endurance. We offer market-leading quality for exceptional value for money.