Here, to help, you can learn why is my smoke detector leaking water and how to fix it. Water leaking through a smoke alarm hole usually indicates a roof leak or plumbing pipe issue above the ceiling Discover why your smoke detector is leaking water and how to fix it
ESA - Smoke
This article covers common causes like roof leaks, condensation, and plumbing issues with solutions.
Discover why your smoke detector is leaking water and find helpful articles to resolve the issue.
The roof (and indeed the house) is 1 year old, so i would hope that it hasn't sprung a leak, but i can't think of how else water would have gotten into the smoke detector. There is most definitely either a plumbing leak somewhere in between the floors or a clogged gutter causing water to overflow into the siding of the house Water never just appears by itself and there is no water in smoke alarms Water leaks are also common around chimneys
If the flashing around your chimney is loose or defective, water can begin to leak inside your home and seep down your walls Ice dams during the winter can cause structural damage to your roof and cause water to run down the wall behind your smoke detector.
