Specialist Welsh slate roof repairs in Bath. Nail sickness, slipped slates, lead soaker failure and ridge work on Victorian and Edwardian properties across BA1 and BA2. Free no-obligation quotes.
Most Bath roof repairs trace back to a handful of failure points: a slipped slate, cracked mortar, or tired lead flashing letting water past. The tell-tale signs usually show inside before the roof looks obviously wrong.
A damp patch or brown stain on an upstairs ceiling after rain
A slate or tile lying in the garden or gutter
Daylight visible in the loft, or wet felt and timbers
Mortar crumbling from ridge or verge
Water tracking down a chimney breast
When it is not the answer: If more than about a third of the covering has failed and slates lift by hand across the whole slope, repairing tile-by-tile is money wasted. Read the full guide.
Cross-section of a pitched roof showing where leaks start
Slate Roof Repair in Bath
Slate Roof Repair Bath
Bath has one of the highest concentrations of Welsh slate roofing of any UK city. The Victorian and Edwardian suburbs — Oldfield Park, Bear Flat, Widcombe, Bathwick, Larkhall, Weston — are almost entirely roofed in Welsh Penrhyn, Ffestiniog or Preseli slate, most of it now 110 to 140 years old. Understanding how this material ages and how to repair it correctly is a specific specialism, not a standard roofing skill.
Nail Sickness — Bath's Most Common Slate Problem
The original wrought iron fixing nails on Victorian Welsh slate roofs have a service life of 80 to 120 years. Bath's above-average rainfall accelerates this. As nails corrode and expand within the nail holes, slates gradually lose grip and begin slipping under wind load. The progression is self-reinforcing — once started, it accelerates as load transfers to remaining nails. We assess nail sickness severity on every inspection and recommend targeted repair or re-slating based on the percentage of failing nails across each elevation.
Lead Soaker Repair
Lead soakers between slate courses at abutments are the second most common repair type on Bath's Victorian properties. Original Code 3 soakers on properties over 100 years old are routinely at end of life. We replace soakers as part of any re-slating work and can replace them individually where access allows without disturbing the surrounding slates.
Slate Repair Costs in Bath
Individual slate replacement: £100–£200 Small area repair (up to 10 slates): £300–£600 Elevation re-slate (with scaffold): £1,500–£5,000 All work quoted free. Conservation area sourcing included.
For slate roof repairs in Bath call 0122 528 7924. We carry Welsh slate for same-day repair across BA1 and BA2.
Repair Standards
What a Correct Bath Slate Repair Looks Like
Materials That Matter
A correct Welsh slate repair on a Bath Victorian property uses matching Welsh slate from the same or equivalent quarry to the existing roof, double-nailed with copper or stainless steel nails through new holes drilled in the correct position. Never through the old corroded nail holes — the old holes are widened by the original nail corrosion and will not grip a new fixing correctly. Never using aluminium nails, which corrode faster than the iron they replace in Bath's above-average rainfall environment.
What We Check Beyond the Displaced Slate
When we replace a displaced slate on a Bath Victorian property, we inspect the surrounding 20 to 30 slates for nail movement, the nearest soakers for corrosion and lift, the ridge mortar above the repair area, and the valley or flashing condition within 2 metres of the repair. A roofer who simply slots in the replacement slate and leaves has not given the property the inspection it needs. We include this wider assessment in every Bath slate repair at no additional charge.
The Conservation Area Material Requirement
Welsh slate is the only approved roofing material for visible elevations on period properties in Bath's conservation areas. Synthetic slate, fibre cement, and concrete tile alternatives are not accepted by the planning authority for like-for-like replacement on Victorian and Georgian properties within the World Heritage Site. We source from approved Welsh quarries and can provide material sourcing documentation for any conservation area or listed building repair.
Customer Reviews
Recent Jobs
★★★★★
“Nail sickness across the entire rear elevation of our Victorian semi in Oldfield Park. Bath Roofing assessed it properly, gave us the honest answer that repair was no longer viable, and re-slated the full elevation with matching Welsh slate. Excellent work.”
Catherine W. · Oldfield Park, Bath
★★★★★
“Slipped slates on our Bear Flat Edwardian terrace — they came the next day, replaced the displaced slates with matching Welsh slate, checked the surrounding soakers, re-bedded the ridge. Proper job.”
Michael A. · Bear Flat, Bath
★★★★★
“Lead soaker failure on three courses of our 1900 semi in Bathwick. They replaced all three soaker courses without disturbing the surrounding slates. No more damp.”
Edward L. · Bathwick, Bath
The process
How a Bath Roof Repairs Job Runs
1. Survey
We inspect the roof inside and out, identify every fault, and photograph what we find so you can see it too.
2. Written itemised quote
You get a fixed-price quote listing each repair and the materials, with no call-out fee and nothing hidden.
3. Scheduling
We book a slot that suits you, usually within a few working days, and confirm access needs in advance.
4. The work
We carry out the repair with matching materials and correct fixings, keeping you updated as we go.
5. Cleanup & sign-off
We clear all debris, leave the site tidy, and hand over your written workmanship guarantee.
Timescales
Job Durations at a Glance
Job
Typical duration
Slipped or cracked slate refix
1–2 hours
Lead flashing repair
Half a day
Ridge or verge re-bed (per section)
Half to full day
Rear valley rebuild
2–3 days
Multiple-fault repair visit
1 day
Wet or high-wind days pause work at height — we build weather margin into every Bath booking and never leave a roof open.
Access
Getting Safely onto Bath Roofs
Most Bath repairs run from roof ladders or a tower; scaffold is specified only where the job needs safe standing time at height. Scaffold is specified for: chimney-side repairs, full valley rebuilds, and anything beyond a day at height - always itemised in your written quote, never a hidden extra, and we arrange it.
Bath's Georgian and Victorian terraces mean tight pavements, controlled parking, and rear-access scaffold on many streets. Pavement scaffold and skip permits go through Bath & North East Somerset Council; allow a few working days on streets like Milsom Street, Broad Street, Margaret's Buildings where space is tight.
Pricing
What Roof Repairs Costs in Bath
Job
Typical range
Notes
Slipped/cracked slate refix
£150–£350
Per visit incl. access
Lead flashing repair
£250–£600
Chimney or abutment
Ridge/verge re-bed
£300–£700
Per section, lime mortar
Valley repair or rebuild
£450–£1,200
Depends on length
Multiple-fault repair day
£600–£950
Full day, two roofers
What moves the price
Roof height, pitch and access on Bath's taller terraces
Whether lime mortar and matching Welsh slate are needed (conservation stock)
Scaffold vs tower vs ladder for safe access
Extent of concealed damage found once opened up
Worked example: A slipped-slate refix plus a length of failed lead flashing on a Victorian terrace off the Wells Road: around £480 including tower access and matching slate.
No deposit on repairs under £500. You pay on completion once you're happy — never before the work is done. VAT included in every quoted figure.
Covering BA1, BA2 and surrounding postcodes.
Guarantee
Your Guarantee, Explained
Workmanship on the repaired section is covered for 10 years in writing; any replacement slates or tiles carry their manufacturer warranties on top.
Covered: workmanship for 10 years, in writing, transferable if you sell.
On top: manufacturer warranties on materials (terms vary by product).
Not covered: storm or impact damage - that is an insurance matter, and we will document it for your claim.
If a fault appears in covered work, we come back and put it right. No quibbling, no re-charge.
Good to know
What It Is Like While We Work
A repair is usually a day of ladder or tower work with a small amount of debris — we sheet below the work area and clear everything before we leave. You do not need to stay home for external work - we just need power and access agreed in advance.
Repairs run year-round; if rain stops work mid-job we fit temporary weatherproofing the same day so no more water gets in. Bath's valley setting holds humidity, so north-facing slopes dry slowly and moss builds up through autumn.
FAQ
Frequently Asked Questions
Individual slate replacement costs 100 to 200 pounds. Small area repairs of up to 10 slates cost 300 to 600 pounds. Full elevation re-slating costs 1,500 to 5,000 pounds depending on size and access. Free quotes for all slate work.
Yes. We carry matching Welsh slate stock on all vehicles for same-day repair across BA1 and BA2.
The key indicator is the percentage of nails failing across an elevation. Below 20 percent, targeted repair is viable. Above 25 to 30 percent, full re-slating of the elevation is almost always better value over 5 to 10 years. We assess this honestly on every survey.
Yes. We source matching Welsh slate from approved quarries for all Bath conservation area work. The grade, thickness and surface texture is matched to the existing roof.
A correctly executed repair using copper or stainless nails through new holes, with lead soakers where required, should last the remaining life of the roof — typically 30 to 50-plus years on a Victorian property that has been maintained.
Yes. We cover all Bath districts including Oldfield Park, Bear Flat, Bathwick, Lansdown, Widcombe, Twerton, Weston and all surrounding areas.
No. We never charge a call-out fee. Free assessment on every job.
