Gutter repair
Most gutter problems are not the end of their service life, but a blockage, a bracket that has moved or a leaking joint. Before you decide to replace them, it pays to find out exactly what is failing.
- Sheet
- Gutter repair
- Revision
- Sources
- 5 items
- Type
- information guide
Diagnosis by symptom
| Symptom | Possible cause | Solution |
|---|---|---|
| water spills over the front edge of the gutter | blocked hopper or downpipe, downpipe too small for the area | clear it; if it keeps happening, add a downpipe |
| water stands in part of the gutter | bent or displaced bracket, back-fall | realign the brackets to a string line, set the fall |
| drips from a joint | leaking union, damaged rubber seal, joint without expansion allowance torn apart | replace the seal or union, add an expansion piece |
| water runs behind the gutter down the facade | covering does not overhang into the gutter, no eaves flashing | adjust the eaves flashing, or move the gutter |
| rust patches and pinholes | galvanised steel at the end of its life, run-off from copper, damaged paint | repair locally only if corrosion is in spots; otherwise replace the run |
| downpipe drips at a bend | bend fitted against the direction of flow | swap the order of the pieces |
| wet plinth by the downpipe | blocked connection below ground, no shoe | clear the gully, add an access point |
| gutter torn off in winter | ice and snow, no snow guards, weak brackets | repair the brackets, consider snow guards on the roof |
Repair or replace?
A repair makes sense when the problem is local: one joint, one hopper, a few brackets. Replacement is more sensible when:
- corrosion is not in spots but along the whole length,
- the gutter is simply too small for the roof area,
- the brackets are rotten or rusty along most of the length,
- the roof covering is being replaced or the facade insulated anyway (the scaffolding is already up).
More detail in the article When to replace gutters.
Principles for repairs
- use parts from the same manufacturer and in the same material as the original system,
- do not cut the sheet with an angle grinder (KJG, Lindab and Ruukki all exclude it),
- on pre-painted sheet, touch up cuts and scratches with touch-up paint,
- on soldered systems (titanium-zinc, copper), leave the repair to a roofer with soldering equipment,
- carry out a water test after the repair.
Cost
Numiq (14 May 2026) gives €20–40 per hour excl. VAT for repairing existing flashings, and flavio.sk (May 2025) €10–25 per m for fitting a rainwater system. With small repairs, a large part of the price is travel and access (ladder, platform).
Technical sources
The sources this sheet draws on. We checked prices and values from standards on the date shown; for prices, whatever the source currently states always applies. Sources marked “in Slovak” or “in Czech” are only available in that language.
| Item | Source | Published by | Version / date | Checked |
|---|---|---|---|---|
| 01 | Installation guide – KJG half-round rainwater system 2025 (bracket fall, expansion joints, thermal expansion) (in Slovak) | KJG a.s. | 2025 | 14 October 2026 |
| 02 | Lindab a.s. warranty certificate – conditions: min. gutter fall 5 mm/m, no contact with copper (in Slovak) | Lindab a.s. (Slovakia) | valid for products bought after 15 April 2019 | 14 October 2026 |
| 03 | Ruukki warranty certificate – GreenCoat RWS Pro rainwater system 30 years; half the periods above 900 m above sea level (in Slovak) | Ruukki Slovakia s.r.o. | template 09/2026, for products sold after 1 September 2026 | 14 October 2026 |
| 04 | Sheet-metal roofing work – indicative labour prices (excl. VAT, excl. materials) (in Slovak) | Numiq (price comparison portal) | updated 14 May 2026 | 14 October 2026 |
| 05 | What sheet-metal roofing work costs – indicative prices from tradespeople (in Slovak) | flavio.sk (enquiry portal) | May 2025 | 14 October 2026 |
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