8 Signs Your Roof Needs Repair (Do Not Ignore These)

Visible External Signs

You can spot these from ground level or from an upstairs window overlooking the roof:

• 1. Missing, cracked or slipped tiles - The most obvious sign. Even one missing tile exposes the underlay to UV and rain, which quickly degrades it. Check after every storm.
• 2. Sagging or dipping roofline - Stand across the street and look at your ridge line. It should be straight. Any dip or bow suggests timber problems underneath, possibly from long-term water ingress.
• 3. Excessive moss or algae growth - Some moss is normal on north-facing slopes. But thick, heavy growth lifts tile edges and blocks water drainage. It also holds moisture against the tile surface.
• 4. Damaged or missing flashing - Check around chimneys, walls and where the roof meets an extension. Cracked, lifted or missing lead flashing is a very common leak source.

Interior Warning Signs

These signs show up inside your home and often indicate a problem that has been developing for a while:

• 5. Damp patches on ceilings or walls - Brown stains or bubbling paint on upper floor ceilings usually point to a roof leak. The stain may appear some distance from the actual leak, as water travels along timbers and underlay before dripping.
• 6. Daylight visible through the roof - Go into your loft on a bright day and look up. If you can see pinpoints of light, the underlay has failed and your tiles are not keeping water out on their own.

If you spot damp in the loft space or on rafters, act quickly. Timber rot spreads and structural repairs are expensive.

Less Obvious Warning Signs

These are the ones homeowners frequently miss:

• 7. Crumbling mortar on ridge tiles or verges - The cement that holds ridge tiles in place and seals verge edges cracks and falls away over time. You might notice small chunks of mortar in your gutters or on the ground below.
• 8. Rising energy bills - If your heating costs have crept up without an obvious explanation, damaged or missing roof insulation could be to blame. Water ingress soaks insulation and destroys its effectiveness.

Blocked or overflowing gutters are worth mentioning too. While not a roof problem as such, they cause water to back up under tiles and saturate fascia boards, leading to roof edge damage.

What to Do If You Spot These Signs

If you notice any of these problems, the next steps are straightforward:

• Do not panic - Most roof issues are repairable if caught early. Even a leak does not automatically mean you need a new roof.
• Get a professional inspection - A roofer can assess the problem properly and tell you whether it is a simple repair or something more serious. Many offer free inspections or charge a small call-out fee.
• Get multiple quotes - For anything beyond a minor repair, get at least two or three written quotes. This protects you from being overcharged and helps you understand the scope of work. Set up a regular roof inspection schedule to catch future issues early.
• Document everything - Take photos before and during any work. This is useful for insurance claims and for your own records.

The worst thing you can do is ignore it. Every month of delay typically makes the eventual repair more expensive. For an idea of what repairs cost, see our roof repair costs guide. If the damage is from a storm and you need help right now, go to our emergency roof repair guide.