ASSA ABLOY Security Doors Security Doors ASSA ABLOY Security Doors is the UK’s leading manufacturer of high-performance steel and timber doors. Our project managers and technical team work closely with clients to develop a range of doorset solutions that are tailor made to individual project requirements. We offer the UK’s leading ranges of proven security doors – Powershield and Prima steel doors, Safeguard high security timber doors and SMARTec high-performance timber doors, fully backed by relevant certification. Our precision-made doors are supplied with factory-fitted hardware and installed by skilled teams of directly-employed site personnel. For architects, specifiers and contractors, ASSA ABLOY Security Doors offers one-stop security door solutions from a single, experienced and trusted source that will provide a full project management service from door specification to installation and maintenance.