Falls are the main danger
Falls from roofs and through fragile roofing are among the most serious hazards in residential construction. Steel becomes slippery with dew, rain or dust. Tiles crack and slide. Fibro and old translucent sheeting can break under a person's weight without warning. Professional roofers use edge protection, harnesses, anchor points and safe ladder setups because they are on roofs every day and know how quickly things go wrong. An owner on a ladder with a tool belt has none of that.
Queensland's work health and safety laws require controls for work at height on worksites. Those obligations exist because falls kill and disable people every year.
Asbestos
Many Sunshine Coast houses, garages and sheds built before about 1990 have fibro walls, eaves or roofing that may contain asbestos. Drilling, cutting, breaking or water-blasting these materials releases fibres. Workplace Health and Safety Queensland sets rules on who may remove asbestos and how. Even where an owner is allowed to remove a small quantity of bonded material, the handling, wrapping and disposal requirements are strict, and a roof is about the worst place to try. See asbestos roof replacement and removal.
Licensing and approvals
In Queensland, building work above a set value generally needs a contractor holding the right QBCC licence. Owners can sometimes do their own building work under an owner-builder permit, which comes with its own conditions and disclosure obligations when you sell. Separately, some roof work needs building approval through a certifier or council. Doing the work without the right permit or approval can create problems with insurance, finance and sale. Our page on roofing regulations in QLD explains the framework.
Technical traps
Tie-downs and wind
Roofs must be held down against wind uplift, and the requirements depend on the site's wind classification. Batten fixings, screw types and spacings, and the connection of the roof to the walls are all specified for this. A roof that looks fine on a calm day can lift in a summer storm cell if these details are wrong.
Flashings and water paths
Most leaks start at flashings, valleys and penetrations. Getting water to flow where it should, across laps, around chimneys and vents and into gutters, is a skill learned over many roofs. Silicone is not a substitute.
Sarking and condensation
In humid coastal conditions, getting the membrane and ventilation right is what stops condensation dripping into the ceiling. A roof without it, or with it laid wrongly, can rot battens and grow mould within a few seasons.
Metal compatibility
Mixing incompatible metals, such as copper or lead runoff onto coated steel, or the wrong fixings, causes corrosion. Leaving swarf on new steel causes rust stains.
Money that doesn't get saved
DIY seems cheaper, but the comparison usually leaves out tool and equipment hire, scaffold or edge protection, waste disposal, the time taken (often weeks instead of days), material wastage from cutting mistakes, and the cost of fixing errors. Add the risk that an insurer questions a claim or a buyer's inspector flags the work, and the savings shrink.
What owners can safely do
- Gather information: photos from the ground, notes about leaks, the age of the house.
- Keep gutters and downpipes clear from a stable ladder or with ground-based tools.
- Check the roof space with a torch for stains, daylight and damp.
- Get two or three quotes and compare them with our roof replacement checklist.
- Prepare the house for the job, as described in what to expect during a roof replacement.
A middle path
If cost is the driver, talk to a roofer about options: repairing rather than replacing, phasing work, choosing a standard profile and colour, or keeping sound gutters. Our cost guide and budgeting article can help you plan.
General information for Sunshine Coast property owners, not advice about your particular roof. Rules, products and programs change; confirm with the authority named, or with Sunshine Coast Council or Noosa Shire Council, before acting.