Why repair almost always wins on commercial doors
Commercial doors are built to be maintained. Pivots, closers, locks, hinges, latches and seals are all designed as replaceable wear items. The door blade itself — aluminium frame and glazing, or steel skin and core — typically outlasts every piece of hardware bolted to it. Replacing the door because the closer failed is like replacing a car because the tyres are worn.
The rare cases where replacement is genuinely the right call follow a clear pattern. Understanding them — and ruling them in or out quickly — is the diagnostic skill that saves the most money.
Replacement scenario 1: frame structural failure
The frame is the door’s reference structure. Pivots are bolted to the frame. Strike plates are mounted on the frame. Top centres engage with the frame head. When the frame itself is compromised — corroded through at the threshold, structurally cracked, bent by vehicle impact — none of the hardware can be set true.
Replacement: full frame replacement (sometimes plus the door blade if it was bent in the same incident). 1–3 days work depending on access, glazing requirements, and finish. Typical cost £2,500–£8,000.
Decision indicator: can the hardware be installed to correct alignment? If yes (frame is sound enough to hold fixings true), repair. If no (frame moves under fixing torque, fixings will not hold), replace.
Replacement scenario 2: irreparable glazing damage
Cracked or shattered toughened glass cannot be repaired. The glass is replaced — not the door. On framed aluminium doors, glass replacement is straightforward (£600–£1,500). On frameless APG doors, the glass essentially IS the door, so glass replacement is door replacement.
Decision indicator: is the glass cracked, chipped beyond surface depth, or shattered? Replace the glass. Is the rest of the door structurally sound? Keep it.
Replacement scenario 3: certification loss on fire or security doors
Fire doors (FD30, FD60) and security doors (LPS 1175 graded) carry certification that depends on the door, frame, hardware and seals all matching the original specification. Modifications, non-spec replacement parts, or structural damage can invalidate the certificate.
For fire doors: where modifications cannot be reversed (extra holes drilled, incompatible hardware fitted, intumescent strips removed and not replaced like-for-like), the door is no longer a certified fire door. Replacement with a new certified set is required.
For security doors: similar logic. Where damage from forced entry has compromised the structural elements that gave the door its security rating, a graded replacement is required to restore the certification.
Replacement scenario 4: end-of-life on doors with no parts available
Older doors from defunct manufacturers, or specialist installations using proprietary hardware that is no longer made, can reach a point where like-for-like replacement parts are unavailable.
In our experience this is rarer than expected — the major brands (Dorma, Geze, Briton, Adams Rite, ASSA Abloy) have long-running parts catalogues with backward compatibility, and even obsolete hardware often has direct equivalents or adapter solutions.
Where parts genuinely cannot be sourced, an engineer can usually retrofit a current-generation alternative — but if the door’s frame and hardware were custom-designed as a set and no current parts will fit, full doorset replacement becomes the only path.
Replacement scenario 5: total cost of ownership tipping point
For older doors with multiple components nearing end-of-life, the maths sometimes favours full replacement. Example: a 25-year-old aluminium shopfront door with worn pivot, leaking closer, sticky lock, deteriorated seals, and chipped glass. Repairing each over 12 months: £2,000+. New like-for-like doorset including hardware: £3,000–£4,000. The replacement may be the cheaper option over a 5-year horizon.
A coordinated quote from a contractor experienced in both repair and replacement clarifies the maths. We provide both costs side by side when relevant so the customer can choose on evidence.
When in doubt: ask for both quotes
Repair vs replacement is not always obvious. A well-respected contractor will quote both options where the choice is genuinely open, and explain which they’d recommend and why. Decisions made on numbers rather than assumption hold up under scrutiny.
Where a contractor is pushing replacement without offering a repair quote first, ask why. On most commercial doors, repair is a viable option that should at least be considered.