Signs your gutters are blocked — and what happens if you ignore them
By Charlie · Local gutter cleaner · 29 October 2026 · 4 min readThe clearest signs are water overflowing in rain, damp patches on walls, plants growing from the gutter, and gutters sagging or pulling away from the fascia.
The 7 warning signs
1. Water pouring over the gutter edge during rain. 2. Damp or green streaks on outside walls. 3. Weeds or moss growing out of the gutter. 4. Gutters sagging or pulling away. 5. Water pooling around the base of the house. 6. Birds or insects nesting in the gutter. 7. Damp patches or mould on inside walls or ceilings near the eaves.
What happens if you ignore them
Trapped water soaks into brickwork and fascia boards, which can lead to rot, damp inside the home, and cracked render. Overflowing water near the foundations can also cause problems over time. In freezing weather, blocked water expands and can split joints.
What to do next
A professional clean with a high-reach vacuum clears gutters from the ground, with camera photos so you can see the result. If joints are leaking, these can often be resealed on the same visit.