Canberra has a climate that tests every part of your roof. We sit at around 580 metres above sea level - higher than any other Australian capital - which means colder winters, more intense UV, and more dramatic temperature swings than coastal cities like Sydney or Melbourne.
In a single year, your roof endures:
No roofing material is immune to this punishment. But with regular seasonal maintenance, you can dramatically extend your roof's lifespan and avoid expensive emergency repairs.
Autumn is the ideal time for roof maintenance in Canberra. The weather is mild, making it safe and comfortable to work on roofs, and you are preparing for the two toughest seasons - winter and spring.
This is the most important single thing you can do for your roof's health. Canberra's deciduous trees - particularly the European species planted throughout inner Canberra suburbs like Ainslie, Braddon, Turner, and Forrest - drop enormous volumes of leaves in autumn. Blocked gutters cause water to back up under roof tiles and sheeting, leading to fascia rot, ceiling leaks, and foundation damage.
We recommend a thorough gutter clean in late April or early May once the majority of leaves have fallen. If you have large trees overhanging your roof, you may need a second clean in June.
Before winter's freeze-thaw cycles begin, check the condition of your ridge cap pointing. If the mortar is already cracked or loose, winter frost will make it dramatically worse. Re-pointing ridge caps in autumn is far cheaper than repairing the water damage caused by failed pointing over winter.
Flashings are the metal strips that seal the junctions between your roof and walls, chimneys, skylights, and where different roof planes meet. Over time, the sealant around flashings dries out and cracks. A quick inspection in autumn can identify any flashings that need resealing before the winter rains.
Branches that overhang your roof can cause several problems: leaves block gutters, branches scrape and damage roof surfaces in wind, and they provide a bridge for possums (a common issue in suburbs like Weston, Duffy, and Rivett where mature eucalyptus trees are prevalent). Trim back any branches within 2 metres of your roof.
Winter is Canberra's most damaging season for roofs. The primary threats are frost, ice, and the cumulative effect of freeze-thaw cycles on mortar, tiles, and sealants.
Ice dams occur when heat escaping from your home melts snow or frost on the roof, and the meltwater refreezes at the colder eaves. The ice builds up and creates a dam that prevents water draining into the gutter. Water then backs up under tiles or sheeting and leaks into the roof cavity. This is relatively rare in Canberra compared to alpine areas, but we do see it in higher-altitude suburbs and on poorly insulated homes after heavy frost events.
As we discussed in our roof ventilation article, winter condensation in the roof cavity is extremely common in Canberra. If you have access to your roof space (via a manhole), do a visual check on a cold morning. Look for water droplets on the underside of the roof sheeting, damp insulation batts, or any signs of mould. If you see these, your roof cavity needs better ventilation.
This is critical. Tile roofs become extremely slippery when frosted, and concrete tiles can crack under foot when frozen. Never attempt to walk on your roof on a frosty morning. If you need emergency work done on your roof in winter, call a professional who has the right safety equipment.
Spring in Canberra brings warmer days, but also the strongest winds of the year and the beginning of storm and hail season.
After the freeze-thaw punishment of winter, spring is the time to inspect your roof for any new damage. Look for:
Canberra's storm season typically runs from October through March. The most damaging events are supercell thunderstorms that produce large hail, destructive winds, and intense rainfall. The January 2020 hailstorm remains one of Australia's most expensive natural disasters, with hailstones the size of golf balls smashing tiles, denting metal roofs, and causing widespread water damage across the city.
You cannot prevent hail damage, but you can minimise its impact by ensuring your roof is in the best possible condition before storm season. Replace any cracked tiles, reseal any failed flashings, clear gutters so water can drain freely, and make sure your home insurance is up to date with adequate coverage.
Speaking of insurance - review your home and contents policy before storm season. Ensure you have adequate coverage for storm damage, including temporary accommodation if your home becomes uninhabitable. Document the current condition of your roof with photos so you have a baseline for any future insurance claims. Our roof inspection reports serve as excellent pre-storm documentation.
Summer's main threats to your roof are heat, UV radiation, and the continuation of storm season.
Canberra's intense summer UV breaks down roof coatings, sealants, and rubber components faster than in most Australian cities. If your roof coating is starting to fade, chalk, or peel, it is losing its protective properties and your roofing material is being exposed to direct UV and moisture. This is particularly noticeable on north and west-facing roof planes that get the most direct sun.
On a 40-degree day, your roof surface can reach 70 to 80 degrees. On a winter night, it might drop to minus 5. That 80-plus degree swing causes significant thermal expansion and contraction. Over years, this movement loosens fixings, cracks mortar, opens gaps in flashings, and fatigues metal sheeting. There is nothing you can do to prevent thermal movement, but regular maintenance catches the damage it causes before leaks develop.
After any significant storm event - particularly one involving hail - do a ground-level visual check of your roof. Look for cracked tiles, dented metal sheeting, displaced ridge caps, or debris on the roof. If you see damage, document it with photos and contact your insurance company and a roofing professional promptly. We offer post-storm inspection services and can provide reports suitable for insurance claims.
Regardless of the season, these habits will help protect your Canberra roof:
If it has been more than 12 months since your last roof inspection, now is a good time to book one. Our comprehensive $99 inspections cover every component of your roof and provide a detailed report with prioritised recommendations. We cover all ACT suburbs, 7 days a week. Book online or call (02) 5133 5608.
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