Is a small roof leak serious?
The short answer
The size of the stain says little. What matters is what the water is running across on the way in. A slow leak tracking over a rafter end or soaking insulation can do more damage over a winter than an obvious drip into a bucket, because nobody sees it and nothing dries out between spells of rain.
What evidence should you look for?
A small stain that reappears or slowly enlarges after each wet spell.
- What it can mean
- Water is entering repeatedly and the affected materials are staying wet.
- What else could explain it
- A historic stain that never changes may relate to a fault already repaired.
Repair soon · Inspection needed to confirm
What could this mean?
Mark the edge of the stain with a pencil line and date it. If the line is inside the stain after the next downpour, the leak is live.
How serious is it? — Repair soon
Persistent low-level wetting damages timber and insulation quietly, and repair scope grows with time rather than with the size of the stain.
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What should you do next?
Check the loft above the stain for wet timber or compressed, damp insulation — that tells you far more than the ceiling does.
Reviewed by Aaron, Owner, Elite Roofing Services Cumbria Ltd — last reviewed .
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