How to Spot a Roof Leak Early

1. Stains on Ceilings or Walls

One of the most obvious signs of a roof leak is a brown or yellowish stain on your ceiling or upper walls. These marks are caused by water seeping through the roof structure and into your plaster or paint. Even if the stain seems small or dry, it’s worth investigating — the leak could be worse than it looks.

2. Missing, Cracked, or Loose Slates/Tiles

Take a look at your roof from the ground or use binoculars for a closer view. Slipped, cracked, or missing tiles create gaps where water can get in. After storms or high winds, it’s especially important to check, as even one damaged tile can lead to a leak over time.

3. Damp or Musty Smells in the Loft

Your loft or attic often reveals problems before the rest of the house does. If you notice damp smells, water marks, or wet insulation, these are strong clues that water is entering from above. Regular loft checks — particularly after heavy rain — can help you catch leaks early.

4. Blocked or Damaged Gutters

Sometimes what appears to be a roof leak is actually a gutter problem. If gutters are blocked, cracked, or pulling away from the roofline, rainwater can overflow and seep into the roof structure. Make sure your gutters are clear and securely fixed, especially before winter.

5. Moss and Algae Growth

While moss may look harmless, it retains moisture and can force tiles apart as it grows. Over time, this can create spaces for water to enter. If you see patches of moss or algae, it’s a good idea to have them removed and the roof inspected for hidden damage.

What to Do if You Spot a Leak

• Act quickly – Don’t wait for the problem to get worse.

• Document the issue – Take photos of stains, damage, or the affected area.

• Call a professional roofer – A trained expert can trace the exact source and carry out the right repair.

Roof leaks rarely fix themselves. By learning to spot the warning signs early, you can protect your home from expensive water damage and keep your roof in top condition.

At Amber Shield Roofing, we specialise in roof leak detection and repairs across London. If you’ve noticed any of the signs above, contact us today for a free quotation. Our experienced team will find the source of the leak and make sure your roof is watertight again