What's behind roof problems in Launceston
A long wet stretch
August averages 83.8 mm and July 78.6 mm, the peak of Launceston's 684.1 mm year. Weeks of steady rain give a cracked tile or a gap in the ridge time to soak battens, insulation and plaster before anything dries out.
Leak or condensation?
Overnight lows fall below 2 °C on about 61 days a year, and the airport is described as the most fog-bound commercial airport in Australia. Warm air from inside meets cold roofing and turns to water. Under a metal roof without good sarking or insulation, that drip looks exactly like a leak, except it shows on cold, still mornings rather than in rain.
Federation and Victorian details
Newstead is the usual example of Launceston's Federation housing, and the city has many Victorian and Georgian buildings. On roofs this old, leaks often start at tired ridge mortar, original flashings and the joins where extensions meet the old roof.
Rain that comes sideways
The 1929 floods arrived with north-easterly winds and heavy rain. Strong winds push water sideways into flashings and under tiles on the side of the roof facing the weather, so a leak that only appears in wind usually points to that side.
How a roofer sorts it out
A good roofer starts by working out what's really happening: where the water shows, when, and whether rain or cold brings it on. The fix for a leak is usually replacing tiles, rebedding a section of ridge, or resealing a flashing. Our national page on roof repairs covers each one.
If it's condensation, the cure isn't on the roof surface. Under metal roofing, Lysaght says foil laminate draped 50 to 75 mm between supports acts as a vapour barrier, and CSR Bradford says humidity-responsive powered roof vents can cut winter condensation. A roofer who suggests sarking, insulation or roof ventilation instead of a repair is worth listening to. The guide to condensation or a leak has more on the signs.
What you can check, and what needs a roofer
You can
- Note whether the wet patch appears in rain, in wind, or on cold dry mornings
- Photograph stains as they appear and date the photos
- Look along the roof from the ground with binoculars for slipped tiles or lifted caps
- Catch drips and move anything valuable
Leave to a roofer
- Anything on the roof, which in winter is often frosty or damp
- Tracing the water path inside the roof space
- Repairing ridges, tiles and flashings on older roofs
- Any roof that might be asbestos cement
Questions for a Launceston roofer
- Is this a leak or condensation, and what makes you sure?
- Can you repair the original ridge and flashings rather than replace them?
- If it's condensation, what would fix it: sarking, insulation or ventilation?
- Can you make it safe now and do the full repair in a drier spell?
- Will you send photos of what you found?
- What's your licence number, so I can look you up on the CBOS register?
If it were our house
Before paying for leak hunting, we'd keep a simple diary of when the wet patch shows. Rain points to a leak, cold clear mornings point to condensation, and wind points to the side of the roof facing the weather. We'd get any real repairs done before July if possible, and if it can't wait, a temporary fix now with the proper repair in spring is perfectly reasonable.
Want a roofer to take a look?
Tell us the job and your postcode. We match it with a Find My Roofer certified roofer who specialises in that kind of work, and they call you to quote. Your number goes to them alone.