COLA as a long-term investment
How long does a quality school COLA last?
A quality school COLA built on a steel frame has a design life of 50 years or more for the structural steelwork. PVC fabric membrane roofing lasts 30-plus years before replacement is needed, and Colorbond metal roofing lasts with the frame when maintained. Both roof types sit on the same long-life steel structure.
Frame and corrosion The frame is the permanent element. Hot-dip galvanised steel columns and beams resist corrosion for decades, and coastal locations require additional protective coatings because salt air accelerates corrosion. Connection points (bolts and welds) are the most attention-worthy elements for corrosion and should be inspected on a regular schedule as part of routine maintenance.
Membrane lifecycle For fabric membrane COLAs, the membrane itself is a planned lifecycle component. When it reaches end of life after 30-plus years, replacement costs approximately 20 to 30% of the original build because the steel structure underneath remains intact. On a $1 million project, that equates to roughly $250,000 to $300,000 (plus inflation) three decades later.
Cladding and maintenance-sensitive components For steel-roofed COLAs, the cladding, gutters, and skylights are the components requiring monitoring. Open-truss designs create more corrosion exposure than closed single-beam construction because moisture and bird activity can accumulate at exposed joints. A COLA specified correctly, built to Australian Standards, and maintained on schedule outlasts most other infrastructure investments a school makes.
What ROI do schools get from a COLA investment?
Schools measure COLA return on investment through increased facility utilisation, eliminated weather disruptions, reduced off-site venue costs, community hire revenue, extended surface lifespan for courts and turf, and improved student use. The most useful ROI metric is cost per usable hour: total facility cost divided by the hours the space is actually available for use.
Scheduling certainty A weatherproof COLA delivers a lower cost per usable hour where year-round scheduling is the goal. In Sydney, that captures approximately 122 days per year of programming that shade-only coverage would not secure, according to Bureau of Meteorology rainfall averages. PE, sport, assemblies, and outdoor lessons run every day regardless of weather, which eliminates the wet-weather timetable scrambles that consume teacher and administrative time.
Community hire revenue Schools that specify artificial lighting at design stage enable community hire after hours, creating a direct revenue stream from sporting clubs, community groups, and Outside School Hours Care providers. Independent access pathways prevent hirers from needing to enter school buildings, which simplifies security and liability.
Asset protection and enrolment Covering artificial turf or a court surface with a COLA extends the surface's lifespan by reducing UV degradation, deferring resurfacing costs. Well-designed facilities also support enrolment, because prospective families evaluate campus quality during school tours. Over a 20-year lifecycle, the initial capital cost is a one-time expense. Teaching time reliably delivered by the space is an annual recurring return.
What maintenance do school COLAs actually need?
School COLAs are low-maintenance structures, and routine care is needed to reach their full design life. Steel COLAs need annual structural inspection, gutter and skylight cleaning, and regular checks of connection points (bolts and welds) for corrosion. Fabric membrane COLAs need at least one professional surface clean per year to maintain warranty validity and prevent biological growth.
Steel COLA maintenance Annual inspection should assess rust, structural integrity, and coating condition. Gutter guards are recommended where trees are nearby. Skylights lose light transmission as dirt accumulates, so periodic cleaning keeps the space bright. Connection points are the most corrosion-prone part of any steel structure, because moisture collects at joints and bolt holes.
Fabric membrane maintenance Annual cleaning removes algae, mould, and biological matter that would otherwise degrade the membrane surface over time. Skipping this routine can void the warranty. A correctly installed PVC membrane has a 30-plus year lifespan without structural intervention.
Site-specific considerations Coastal structures require more frequent corrosion checks because of salt air exposure. Bird-proofing maintenance is ongoing where the structure uses reactive solutions like netting or spikes; a COLA designed from the start with no roosting locations avoids this recurring cost entirely, which is why PVC includes bird-proofing as standard. Schools should keep a maintenance log of all work performed, both for warranty claims and for future audits or handover documentation.
