Ceiling Stains After Rain? Roof Plumbing 101 for Brisbane
A ceiling stain after a heavy Brisbane storm is a message from your roof plumbing, not a random one-off. Ninety percent of the time it's one of four causes.
1. Blocked Box Gutter
Box gutters silt up quickly in leafy suburbs. Once they overflow, water pours down internal walls, not the outside.
2. Failed Flashing
Sealant around vent pipes, aircon penetrations and skylights lasts 8–10 years max in Brisbane sun. Replace with proper lead flashing, not more silicone.
3. Rusted Valley Iron
Older tile roofs have zinc valleys that rust from underneath. Look at valley edges from the roof cavity with a torch.
4. Downpipe Overshoot
Undersized downpipes send water sheeting over the front of the gutter, often behind the fascia.
Frequently Asked Questions
Is this a plumber or a roofer?
Roof plumbing (gutters, flashings, downpipes) is licensed plumbing work in Queensland. Tile replacement is a roofer. Most of the time you want a plumber first.