What we install and repair from the ASSA range
High-security mortice locks: the ASSA 700-series is the standard for premium-security commercial entrances. Paired with an ASSA Twin cylinder, it provides top-tier mechanical security with restricted-key control.
Twin cylinders: ASSA Twin is the leading restricted-key cylinder system in the UK premium-security market. Keys are cut only by authorised dealers against a controlled keycard, which prevents unauthorised duplication.
Electronic access: Aperio (wireless mortice locks that communicate with an access-control panel) and ASSA Cliq (electromechanical key systems where each key carries credentials) are the two electronic options. See commercial door lock and access control repairs.
Cross-brand work: as the parent of Yale, Union, Vachette, Adams Rite and Briton, the Assa Abloy distribution network supplies most spares for those brands through the same channel. See those individual brand pages for product-specific scope.
When ASSA is the right specification
Three patterns. High-value retail and hospitality — jewellery, pharmacy, premium menswear, hotels — where physical security and key control matter more than cost. Secure infrastructure — data centres, telecoms cabinets, utility substations — where regulatory compliance requires top-tier physical security. And restricted-key estates — multi-site retail or facilities operations where unauthorised key duplication is the threat being defended against.
For general commercial use (offices, schools, healthcare) ASSA is over-specified — Yale or Union covers the requirement at lower cost. ASSA enters the picture where the threat model justifies the cost.
Common ASSA faults
Twin cylinder wear — ASSA cylinders are heavier-built than competitors and last longer, but eventually reach end-of-life on the keyway. Replacement is the route; restricted-key control is maintained by replacing through the same authorised dealer with the same keycard.
700-series mortice case wear — rare given the build quality. Where it happens, case replacement preserves the existing cylinder and keying.
Aperio battery and connectivity faults — Aperio wireless mortice locks run on battery; standard maintenance is annual battery replacement on each lock.
ASSA Cliq electronic key failure — the electronic credential in the key can fail; we re-issue against the authorisation panel.
Restricted key control and dealer authorisation
ASSA Twin and ASSA Cliq operate on restricted-key control — keys are not cut to the cylinder profile by general key cutters. Instead, the customer holds an ASSA-issued keycard and orders new keys through an authorised ASSA dealer who matches the keycard before cutting. This is the security benefit of the system; it is also the procedural overhead.
For multi-site customers we manage the keycard register on the customer's behalf and order new keys against the relevant card when staff turn over. The procedural overhead is part of the value, not a cost to minimise.
Sourcing and stock
ASSA spares come through Assa Abloy UK distribution. Common Twin cylinder bodies and 700-series mortice cases are stocked or available next-day. Restricted-key cut work runs through the authorised dealer network — typically 2–3 days from order against keycard. For Aperio and ASSA Cliq electronic components, lead times are similar; the electronic credential matters more than the physical part.