Every use / routine visual
- unusual list or low freeboard
- loose boards/grating
- damaged fenders
- missing fasteners
- electrical damage
Quarterly to six-monthly
- cleats and backing
- pile-guide wear
- gangway hinges/rollers
- float access ports
- anchor chains/cables where accessible
- ladder and rails
Annual
- structural corrosion
- weld cracking
- pile condition
- underwater connections
- float leakage/water ingress
- electrical inspection
- shore abutment
- marine growth
- fastener torque/condition where specified
Public, industrial and commercial assets should have a formal risk-based inspection plan and defect register.
Build the schedule around the failure modes
Maintenance on a floating structure is not general tidiness. It targets a small number of things that actually fail: sacrificial anodes that are consumed, connections that work loose under cyclic load, surfaces that wear where people walk, and hardware that corrodes where two metals meet.
A schedule that names these items, with intervals and a record, is also what keeps a warranty alive. Most warranty disputes turn on whether the assumed maintenance was performed and can be evidenced.
What a workable regime covers
- Anodes: inspected on a stated interval, replaced at a stated level of consumption, and recorded when replaced.
- Fasteners and connections: checked for tightness, movement, elongation of holes and signs of fretting.
- Restraint hardware: pile guides, rollers, chains, shackles and hinges inspected through the full range of movement.
- Deck surface: wear, fixing security, slip resistance in wet conditions, and edge condition.
- Floats and hull: damage, water ingress, deformation, and anything that suggests lost buoyancy.
- Services: electrical testing to the applicable requirements, and water systems checked for leaks and isolation.
- Growth and debris: cleared before it loads the structure or hides a defect.
Records that protect you
- Date, inspector, conditions and water level for each inspection.
- Photographs of any defect, dated, with the location noted.
- What was replaced, with the part and supplier.
- Defects deferred, with the reason and the review date.
Where maintenance regimes fail
- Nobody owns the schedule, so it happens when something looks wrong rather than on an interval.
- Anodes are inspected but never replaced until they are gone.
- Inspections are visual only, so connections are never actually checked for movement.
- No record is kept, so the warranty claim has no evidence behind it.
Questions buyers ask
How often should a pontoon be inspected?
The interval should come from the builder's maintenance schedule and the exposure of the site, and it should be stated in the handover documents. A structure in exposed saltwater with heavy use will need attention more often than one in a sheltered freshwater location.
Does maintenance affect the warranty?
Usually yes. Warranties commonly assume a maintenance regime, and failing to perform or evidence it is a common reason claims are refused. Get the assumed regime in writing at handover.