Natural slate is the premium roof covering — a properly laid Welsh or Spanish slate roof can last 150+ years. We supply and install natural slate for new roofs and re-slating projects, source reclaime Serving Harrow and all surrounding areas in Harrow.
Natural slate is the premium roof covering — a properly laid Welsh or Spanish slate roof can last 150+ years. We supply and install natural slate for new roofs and re-slating projects, source reclaimed Welsh slate for period property repairs, and work with reconstituted slate where budget or planning constraints apply.
Harrow has a significant stock of Victorian and Edwardian properties originally roofed in Welsh slate. After 100-120 years, even the best slate begins to delaminate. We source reclaimed Welsh slate from demolition projects across the UK to provide the closest visual and dimensional match for repair work.
Welsh slate (now quarried at Penrhyn and Cwt-y-Bugail) is the finest natural roofing slate in the world — dense, consistent, and virtually imperishable. Spanish slate is more affordable but varies in quality. Reconstituted slate (fibre-cement) gives the appearance at a fraction of the cost but lasts 30-40 years versus 100+.
If your Harrow property is in a conservation area, replacement slate must match the original in size, colour, texture and source where possible. We work with conservation officers to agree specifications before work begins, avoiding costly re-work.
The hilltop conservation area around Harrow School has listed buildings with original Welsh slate and handmade clay tile roofs. Below the hill, 1920s-30s Metroland semis fill the streets around Harrow-on-the-Hill station. Wealdstone to the north has Victorian terraces and post-war estates. For slate roofing work in Harrow, this housing profile means we commonly encounter Wind exposure on hilltop properties is severe — ridge tiles and mortar joints fail at double the rate of sheltered lowland properties. Conservation area restrictions on the Hill mean only approved mat
The streets of Harrow — including High Street Harrow on the Hill, Station Road Harrow, Kenton Road — have roofing characteristics that reflect their construction era and the specific exposure conditions of Harrow. Harrow's elevated position means roofs here face wind loading that properties in the Thames valley floor simply do not experience. Harrow on the Hill is fully exposed to south-westerly gales — wind sp
Slate Roofing in Harrow: £5,000–£20,000 depending on scope, access and materials. Free, written, no-obligation quotes. Call 0203 302 2547.
Free quotes, no call-out fees, same-day emergency service.
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A full re-slate on a typical Harrow Victorian terrace costs £8,000–£14,000 in Spanish natural slate, or £12,000–£20,000 in Welsh slate. Reconstituted slate re-roofing costs £5,000–£9,000.
Welsh slate lasts 100-150+ years. Spanish slate lasts 75-100 years depending on quarry and grade. Reconstituted slate lasts 30-40 years. Natural slate is by far the most cost-effective option when measured per year of service life.
Yes — individual slate replacement is straightforward using a slate ripper tool. We carry a stock of common slate sizes and can usually complete small repairs within a single visit.
We source reclaimed Welsh slate from specialist suppliers who salvage from demolition and renovation projects across Wales and England. Every batch is inspected for delamination, nail holes and frost damage before use.
In our view, yes — especially for properties that will be standing for another 100+ years. The upfront premium over concrete tiles is typically 60-80%, but the roof will outlast two or three concrete tile roofs in that time.
A like-for-like re-slate does not require planning permission. Changing from another material to slate, or changing slate type in a conservation area, may require approval. We handle all planning queries as part of our service.
Yes — we install new slate roofs on extensions, new builds and loft conversions. Modern breathable membranes and treated battens provide the perfect substrate for natural slate.
Harrow's hilltop position has shaped its roofing history for centuries. Harrow School, founded in 1572, sits atop one of London's highest points at 124 metres — and the roofs of its listed buildings have withstood four centuries of some of the most aggressive weather exposure in Greater London. The conservation area around the Hill contains Grade II listed buildings where original Welsh slate and handmade clay tile roofs demand specialist maintenance using period-appropriate materials and techniques.
Wind is Harrow's defining roofing challenge. Harrow-on-the-Hill is exposed to south-westerly gales that drive rain horizontally into mortar joints, accelerate lead fatigue through constant flexing, and create uplift forces on ridge tiles that sheltered locations simply do not experience. Weather station data consistently shows wind speeds 15-20% higher on the Hill than at equivalent lowland sites. This is not a marginal difference — it translates directly into mortar joints failing twice as fast and ridge tiles needing re-bedding twice as frequently.
Pinner's conservation area and village character drive property premiums that make roof maintenance an investment priority. Tudor and period properties on Pinner High Street and the surrounding conservation area require specialist roofing skills — lime mortar repointing, handmade peg tile sourcing, and lead detailing that matches the original specification. These are not jobs for general builders.
Every job follows our standard quality process: free inspection and assessment, written quote with full scope of work, professional installation by our own team using specified materials, post-completion inspection with photographic record, and a written guarantee. This process applies to every job regardless of size — a £200 repair gets the same professional approach as a £15,000 re-roof.
All work carries our written workmanship guarantee. The guarantee period depends on the scope of work — from 2 years on minor repairs to 10 years on full installations. Guarantees are transferable if you sell the property. Materials carry the manufacturer's own guarantee in addition to our workmanship cover.
Slate roofs last longer than almost any covering — but they do eventually need attention.
When it is not the answer: Few slipped slates with sound remainder: individual replacement is cheap. Read the full guide.
Slate condition, nail integrity, underlay assessed.
Reclaimed Welsh for matching. New Welsh/Spanish for re-slates.
Individual replacement or full strip and relay.
Ridges, flashings, valleys addressed.
| Job | Typical duration |
|---|---|
| Individual repairs | 1-2 hours |
| Section re-slate | 3-5 days |
| Full re-slate (semi) | 7-10 days |
Reclaimed slate sourcing: 2-4 weeks lead time.
Full scaffold for significant slate work. Scaffold is specified for: all re-slating - always itemised in your written quote, never a hidden extra, and we arrange it.
1930s Metroland semis — access and scaffold requirements vary by street. Pavement scaffold and skip permits go through Harrow Council; allow a few working days on streets like Station Road, Headstone Lane where space is tight.
| Job | Typical range | Notes |
|---|---|---|
| Individual repair | £150-£300 | Ripper + tingle |
| Section re-slate | £3,000-£6,000 | By area + source |
| Full re-slate — Spanish | £9,000-£15,000 | New slate + battens |
| Full re-slate — Welsh | £14,000-£22,000 | Premium |
| Reconstituted | £5,500-£9,500 | Fibre-cement |
Worked example: Full re-slate, Victorian terrace, Brondesbury Road: 55m2 Spanish natural, new membrane + battens, Code 4 lead — £11,400.
Staged: deposit, progress at felt, balance on completion.
Covering HA1, HA2 and surrounding postcodes.
10-year workmanship. Welsh slate 100-150 years.
If a fault appears in covered work, we come back and put it right. No quibbling, no re-charge.
Multi-day with scaffold. Less dust than concrete. You do not need to stay home for external work - we just need power and access agreed in advance.
Nailing runs in most weather. Ridge pointing needs dry. Harrow Hill elevation means 15-20% higher wind loading than lowland Wembley.
No call-out fees. No obligation. Just an honest quote from a local Harrow roofer who turns up when they say they will.
0203 302 2547 📞 Call Now: 0203 302 2547