Summary

Roof repairs are the most reactive jobs in the building trade and the easiest to underprice. The customer's frame of reference is "it's only a few tiles" while the roofer's actual cost includes call-out time, scaffold or tower hire, materials (often non-stock items), waste, and a meaningful insurance premium for working at height. A small repair priced at £150 frequently makes a loss once you account for the second visit to fit the replacement tile after waiting two weeks for the supplier.

The price drivers on roof repairs are: roof pitch (steeper = more access cost), height (single storey vs three storey), pitch material (slate harder than tile, plain tile harder than interlocking), and time of year (winter call-outs are 30-50% more because of daylight, weather and demand). Builders should always quote a call-out fee even if the repair turns out to be small — the cost of getting to the roof is largely independent of the actual repair size.

This guide covers the common domestic roof repairs: slipped or cracked tiles, ridge tile re-bedding, flashing repairs, valley repairs, gutter clearance and small flat roof patches. For full roof replacements see full roof replacement pricing guide and flat roof replacement pricing guide.

Key Facts

Quick Reference Table

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Repair Time Material Typical Price (Regional) Typical Price (London)
Single slipped tile, ladder access 30-60 min £5-£20 £140-£220 £180-£280
3-5 slipped tiles, ladder + roof ladder 1-2 hr £20-£80 £180-£320 £240-£400
Ridge tile re-bedding (single tile) 1 hr £15-£30 £180-£280 £240-£360
Ridge re-bedding (3-5m run) 0.5 day £50-£120 £400-£650 £550-£850
Chimney flashing (lead) repair 0.5-1 day £80-£200 £450-£800 £600-£1,100
Valley repair (1-2m) 1 day £80-£250 £500-£900 £700-£1,200
Small felt roof patch (1-2m²) 0.5 day £30-£80 £280-£480 £400-£650
EPDM patch (2-3m²) 0.5 day £50-£120 £320-£550 £450-£750
Gutter clearance (semi) 0.5 day nil £100-£180 £140-£250
Gutter repair / re-bracket 0.5-1 day £40-£120 £200-£450 £280-£600
Mortar verge (1 elevation) 1 day £30-£60 £350-£550 £450-£700
Velux glass replacement 0.5-1 day £150-£500 £350-£800 £500-£1,100
Storm damage (mixed, 1 day) 1 day £100-£400 £450-£850 £600-£1,100

Detailed Guidance

The Call-Out Fee — Don't Discount It

Every roof job starts with the cost of getting there. A typical call-out involves 30-45 minutes travel each way, 20-30 minutes ladder setup, 15-20 minutes diagnosis and reporting, and the time to actually do the work. The customer sees only the last bit. Charging a flat call-out fee covering the first 60-90 minutes lets you price the small jobs profitably without inflating hourly rates that look excessive on the invoice.

Typical structure:

Some firms publish a "minimum charge" of £350-£500 — this works for established firms with steady demand but makes you uncompetitive on small repairs.

Diagnosing the Right Repair

The wrong repair is more expensive than no repair. Before quoting:

  1. Inspect from inside — check for water staining at the roof underside, daylight through tiles, damp in adjacent rooms. A ceiling stain 1m from the chimney is usually a flashing problem; a stain at the eaves is usually gutter or fascia.
  2. Inspect from outside, lower elevation first — look for missing tiles, slipped tiles, mortar gaps at the verge and ridge, debris in gutters, damaged downpipes.
  3. Get on the roof only if safe — pitched roof under 35° on a dry day with proper edge protection. Otherwise hire a tower.
  4. Photograph everything — top, sides, valley, ridge, flashings. The customer rarely sees the roof; photographs justify the quote.

Common misdiagnoses:

Slipped Tile Replacement

The most common roof repair. Tiles slip when the nails fail (corroded copper or steel) or the tile nibs break. Replacement:

  1. Locate the slipped tile and the two tiles immediately above
  2. Lift the two tiles above and prop with timber wedges
  3. Remove the slipped tile (and any broken nail or nib remnants)
  4. Slide in the replacement tile; nail if possible (often the original nail position is no longer accessible — modern repairs use tile clips, "tingles" or copper straps)
  5. Reset the tiles above

Time: 30-45 minutes per tile if access is set up. Material: £2-£20 depending on tile. Matching old tiles can be the bottleneck — Marley, Redland, Sandtoft are stockists; reclaimed yards for older patterns.

Ridge Tile Re-bedding

Mortar fails at ridge tiles due to thermal cycling and weather; ridges become loose after 25-40 years. Modern practice is to mechanical-fix using ridge clips and dry verge systems (which last 50+ years), but mortar bedding remains common in repairs.

Sequence:

  1. Lift ridge tiles, knock off old mortar, set tiles aside in order
  2. Wet down the underlying tiles
  3. Bed in fresh 3:1 sand-cement mortar (some specs use plasticiser, no lime)
  4. Re-lay ridge tiles, pointing as you go, removing excess mortar
  5. Strike pointed joints with a trowel

Time: a competent roofer covers 5-8m of ridge per day. Cost: £45-£85/m re-bedded; £400-£700 for a typical 6m ridge. Dry ridge alternative (£60-£90/m supplied + fit) lasts longer and is now preferred by warranty schemes.

Chimney Flashing

Lead flashing around a chimney is one of the highest-failure roof details. Failure modes:

Materials and method:

Cost: £450-£800 regional, £600-£1,100 London for a typical chimney refit. Always include scaffold or tower in the price — leaning over a ridge to dress lead is unsafe.

Flat Roof Patch Repairs

Small flat roof leaks (1-3m²) on felt or EPDM can be patched economically. Larger areas should be re-covered fully rather than repeatedly patched.

Felt (3-layer torch-on):

EPDM:

Cost: £280-£550 regional, £400-£750 London for a typical small patch. Always document with photos before/after — many customers come back asking "is it the same leak" when a new leak appears 5m away from the original.

Gutter Clearance and Repair

Gutters overflow because of debris (leaves, moss, ball bearings of moss from tiled roof above) or because of failed brackets / fall / outlet. Diagnose visually — overflow at one end suggests a fall issue; overflow at multiple points suggests blockage.

Clearance:

Cost: £80-£180 for a typical 3-bed semi; £120-£280 for a terrace with restricted access; £200-£450 for a detached or with multiple downpipes.

Repair:

Pricing Examples

Job 1 — Slipped tile after storm, semi-detached, 2 storey, regional

Job 2 — Chimney lead flashing failing, terrace, scaffold tower needed, London

Job 3 — Gutter clearance + 3m re-bracket, detached, ladders only, regional

Frequently Asked Questions

Do I need scaffolding for a single tile repair?

For a brief access (under 90 minutes) at first-floor level (4-5m to gutter), a properly secured ladder with a roof ladder is acceptable under the Work at Height Regulations 2005 if the roofer has done a documented risk assessment. For longer work, multiple visits, or two-trade jobs, a scaffold tower (£60-£120/day) is the practical minimum. Full perimeter scaffold (£800-£2,000) is needed for re-roofing, valley repairs, or work along a long elevation.

Why is roofing so expensive for what looks like a small job?

The materials are typically 10-20% of the total invoice. The rest is access (ladder setup, tower, scaffold), labour at trade rates including travel, insurance for working at height (much higher than ground-floor trades), and disposal. A "£10 tile" repair is rarely under £180 once you account for the full cost of getting it done safely.

Will my house insurance cover storm-damage roof repair?

Most UK buildings insurance policies cover storm damage with an excess typically £100-£500. Wear-and-tear is excluded — if the tiles were already loose before the storm and the storm just dislodged them, the claim may be refused. Insurers usually need photographs and a quote from a registered roofer. Some insurers prefer their own approved contractor; check before quoting.

Should I use lead or alternatives for flashing?

Code 4-5 lead remains the longest-lasting flashing material (60-100 year service life). Lead-effect EPDM systems (Easy-Lead, Ubiflex) are growing in use, particularly where theft is a risk; service life 15-30 years claimed. Aluminium-coated rubber is acceptable for budget repairs but doesn't dress as well as lead. For chimney flashings the appearance matters — most homeowners want lead.

What guarantees should I offer on roof repairs?

A typical industry standard is 12 months on workmanship for small repairs, longer (5-10 years) on re-roofing. Materials carry the manufacturer's warranty separately (tile manufacturers 30+ years, EPDM 20+ years). Don't offer a guarantee covering "future leaks anywhere on the roof" — restrict it to the specific repair area.

Regulations & Standards