Why are my gutters overflowing?
Usually a blockage: leaves, moss or a ball in the outlet or downpipe. If they overflow even when clear, the run has probably lost its fall or a bracket has given way, so water collects in a dip.
- Blocked outlets and downpipes, especially under trees.
- Leaking joints: the rubber seals in plastic guttering perish with age.
- Sagging runs from broken or too few brackets.
- Rotten fascia boards behind the gutter that no longer hold the screws.
Gutter cleaning on its own is a different job from repair, but a roofer looking at the gutters will usually clear what they find and tell you if anything is broken.
How much does gutter repair or replacement cost?
Small repairs such as a bracket, a stop end or realigning a run cost far less than replacing the whole system. These are general ranges, not quotes, from Checkatrade's gutter replacement guide (October 2026), supply and fit.
| Job | General range |
|---|---|
| Replace a support bracket | about £18–£20 |
| Realign a gutter run | £15–£30 per metre |
| uPVC gutter replaced, with fixings | £30–£70 per metre |
| Aluminium gutter replaced | £55–£180 per metre |
| Cast iron gutter replaced | £85–£275 per metre |
| uPVC downpipe replaced | £35–£45 per metre |
| Whole run of 15–20m with three downpipes | £650–£1,700 |
Your roofer prices your job after seeing it. Ask whether the quote includes access and taking away the old guttering.
Do fascias and soffits need replacing with the gutters?
Only if they're rotten or damaged. Gutters are screwed to the fascia board, so a soft or split fascia means new gutters won't stay put, and it's cheaper to deal with both while the access is up.
Soffits, the boards under the eaves, are worth checking for gaps where birds or wasps get in. Ask the roofer to show you photos of any rot before you agree to replace boards.
Can a leaking gutter cause damp inside?
Yes. Water running down the same patch of wall soaks the brickwork and can show up as damp inside, and a blocked gutter can back water up under the bottom row of tiles. If you've got a damp patch upstairs near the eaves, read roof repairs too.
Gutters and the rest of the roof
A roofer on a ladder at the gutters can also see the bottom courses of tiles, so it is a good time to ask about slipped tiles or a tired ridge. For anything bigger, there's roofing help across Crawley on the same number, and chimney repairs if the leak is by the stack.