Commercial roof and gutter maintenance before the leak reaches the sales floor.
Roof inspections, leak repairs, gutter and downpipe cleaning and roof safety access across store fleets, by height safety trained crews.
- 1:200
- Minimum box gutter fall, AS/NZS 3500.3
- 30 mm
- Freeboard above design water level
- 100 year
- Design storm for a box gutter
Commercial roofing and gutter work keeps water out of a store: roof inspections, leak repairs, sheet and flashing replacement, gutter, box gutter and downpipe cleaning, and safe roof access. Nextage runs it across Australian retail fleets through licensed and height safety trained trades, on a set inspection schedule, with photos of every roof before and after. Delivered in every state and territory.
At a glance
- Standard
- AS/NZS 3500.3, stormwater drainage
- Box gutter fall
- 1:200 minimum to the outlets
- Freeboard
- 30 mm above the design water level
- Design storm
- 100 year ARI for box gutters, 20 year for eaves gutters
- Overflow
- At least the design flow of its outlets, discharging outside the building
- Cleaning interval
- Practice, not a standard. Commonly twice a year
Sources and detail: How often do commercial gutters and box gutters need cleaning?
The problem
- Leaks are found by customers, on stock, during a storm.
- Box gutters and downpipes block with leaves and rubbish because nobody owns the cleaning schedule.
- Roof access is unsafe or undocumented, so contractors either refuse to go up or go up anyway.
What's included
- Roof and gutter inspections with photos and condition notes
- Leak finding and repair, flashing and sheet replacement
- Gutter, box gutter and downpipe cleaning on a schedule
- Roof safety access checks, and anchor and walkway works where needed
- Height safety trained crews, and licensed trades where the state requires them
- Before and after photos per roof
Public liability insurance: $20 million.
Program shape
How the work runs
Same order every time. The order is what makes site 40 match site 1.
Each site closes with a completion report: photos before and after, the work performed, and the handover detail. How a national program runs
Inspect
Every roof photographed and its condition recorded the same way.
Make it safe
Access, anchors and walkways checked before regular work starts.
Fix the leaks
Repairs ranked by risk to stock and customers.
Schedule the cleaning
Gutters and downpipes cleaned before the wet months, not after.
Plan the big work
Roof replacement priced per site and staged to capital.
A good fit
- Freestanding and large format stores that control their own roof
- Fleets with repeat leaks or blocked box gutters
- Owners who need roof access made safe for every other trade
Not a fit
- Shopping centre roofs maintained by the landlord
- New roof design and structural engineering
- Domestic roofing
Run for: Liquor · Large format retail · Convenience and fuel · Shopping centres
FAQ
About commercial roofing & gutters
How often should commercial gutters be cleaned?
Twice a year is the usual practice, timed ahead of the wettest months, and quarterly where trees overhang or there is heavy dust. No Australian standard sets the interval. AS/NZS 3500.3 sets how a box gutter is built: a 1:200 minimum fall, 30 mm freeboard and a 100 year design storm.
How much fall does a box gutter need?
At least 1:200 under AS/NZS 3500.3, with 30 mm of freeboard above the design water level. A box gutter that still holds water after rain has lost that fall or sagged, and that is recorded at the visit.
Can you find a roof leak that keeps coming back?
Yes. Repeat leaks usually come from flashings, penetrations or blocked box gutters. We inspect, photograph and fix the cause, not only the ceiling stain.
What changes the price of roof and gutter work?
Height and how the roof is reached, whether anchor points are in place and tested, box gutters against eaves gutters, how much debris has built up, sheeting that cannot be walked on, trading hours, and the number of penetrations.
Is roof access made safe before work starts?
Yes. Access, anchor points and walkways are checked first, because every trade that goes on that roof afterwards relies on them.
Related
Often runs alongside
Reactive & preventative maintenance
Reactive call outs, make safe, planned preventative maintenance and general repairs across the store fleet, through one accountable team.
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Site safety & condition audits
Fixed price condition and safety assessment across a store fleet, producing a costed remediation scope.
Read more
Commercial pest control
Scheduled pest management, callouts, bird and rodent control across store fleets, by licensed pest technicians with a service record per site.
Read moreRoofing & gutters
How often do commercial gutters and box gutters need cleaning?
How often commercial gutters need clearing, what AS/NZS 3500.3 requires of a box gutter, and why a blocked box gutter floods the shop rather than the wall.
Read the guideA leak reaching the sales floor?
Tell us the stores. We'll inspect the roofs and make them safe.