Roof Repairs Harrow, HA1 & HA2
Roof repairs in Harrow are one of our core roofing services. GNP Roofing Building Ltd are roofers serving Harrow from our base in nearby Southall — typically 20 to 25 minutes from most Harrow addresses. We carry out roof repairs, flat roofing, emergency call-outs, new roof installation, chimney work and guttering across HA1 and HA2, with a 10-year written guarantee on every job.
⚡ Emergency? Same-day attendance across Southall & West London
At a Glance
Who covers roofing in Harrow?
GNP Roofing Building Ltd is a roofing company based in Southall, around 20 to 25 minutes from most Harrow addresses, covering HA1 and HA2. Services include roof repairs, flat roofing (GRP, EPDM, felt), emergency call-outs, new roof installation, chimney repairs and guttering. Every job carries a 10-year written workmanship guarantee, and quotes are free and provided in writing before work starts. Call 07424 323113 for same-day emergency response.Why Harrow Trusts Our Roof Repairs Team
Based in Southall, about 20 to 25 minutes away, our team works on Harrow's interwar semis, the older terraces around Wealdstone and Greenhill, and the period homes on Harrow on the Hill.
Fast Local Response
Based 20 to 25 minutes from most Harrow postcodes, we can usually reach an emergency within 2 to 4 hours, any day of the week.
10-Year Written Guarantee
Every job comes with a signed workmanship guarantee, not a verbal promise — a document you actually keep.
Fully Insured
Full public liability insurance on every job. Proof of cover is available before work begins, no exceptions.
Free Written Quotes
A detailed, itemised quote breaking down materials and labour — no vague verbal estimates.
No Subcontracting
Your job is carried out by our own trained team from start to finish, so the guarantee stays meaningful.
Experienced With Harrow Homes
Harrow has a real mix: 1930s semis around North Harrow, Rayners Lane and Headstone, Victorian and Edwardian terraces in Wealdstone, and period houses on the Hill.
Roof Repairs Harrow: What's Included
From a single slipped tile to a full re-roof, our professional roofing team covers every job across HA1 and HA2.
Trusted Roof Repairs
Slipped tiles, cracked ridge pointing, failing lead valleys and broken ridge caps. Most repairs in Harrow are completed within 24 to 48 hours of your call.
Emergency Roof Repair
Storm damage, sudden leaks, a fallen chimney stack — we make the roof safe and weatherproof quickly, then return to finish the full repair.
Flat Roof Repair & Replacement
Many Harrow homes have flat-roofed rear extensions, garages and dormers. We fit GRP fibreglass (seamless and hard-wearing), EPDM rubber (good for bay roofs and dormers) and torch-on felt for larger, budget-conscious areas.
New Roof Installation
Full strip-and-reroof to NFRC industry standards, in clay, concrete, natural slate or synthetic slate. Every new roof includes a written specification and a signed 10-year guarantee.
Chimney Repairs
Many of Harrow's older homes still have their original chimney stacks, and these need regular attention — repointing, flaunching repair, Lead Sheet Association standard soaker replacement, pot removal and full stack rebuilds.
Guttering, Fascias & Soffits
UPVC, aluminium and cast iron gutter replacement, downpipe re-routing and fascia renewal. Most guttering jobs across HA1 and HA2 are finished in a single day.
Soffit & Fascia Renewal
Fascia and soffit board replacement on older Harrow properties, including safe removal of asbestos-containing boards in line with HSE asbestos guidance, carried out through licensed waste carriers.
Examples of Our Roofing Work
A selection of photos from our roofing work across West London.
Experienced Roof Repairs for Every Harrow Property Type
Harrow's homes range from Victorian and Edwardian terraces in Wealdstone and Greenhill to the 1930s semis of North Harrow and Rayners Lane, so we approach each roof differently.
Harrow Housing Stock
Large parts of Harrow were built in the 1920s and 1930s, when Metro-land suburbs spread out from stations such as North Harrow and Rayners Lane. These semis usually have hipped roofs in clay or concrete tiles, tiled bay roofs and mock-Tudor gables, and many original roofs are now around 90 years old. Wealdstone and Greenhill have older Victorian and Edwardian terraces with slate roofs and lead valleys. Harrow on the Hill is a conservation area, so we check with Harrow Council before changing roof materials there.
Fast Local Response
Based 20 to 25 minutes from Harrow, we can usually reach an emergency within 2 to 4 hours, any day of the week.
What This Means For Your Roof
In practice, most of our Harrow call-outs are slipped tiles and worn ridges on interwar roofs, leaking valleys and flashing on older terraces, and flat roof problems on rear extensions. On the steep, narrow streets of Harrow on the Hill we plan access and scaffolding before the job starts.
Roof Repair Costs in Harrow (2026)
Guide prices for common jobs. Every quote is free, written and detailed before any work begins.
| Job Type | Typical Price (Inc. VAT) |
|---|---|
| Emergency call-out and minor repair | £150 – £400 |
| Tile and slate repairs | £150 – £400 |
| Lead flashing and chimney repairs | £300 – £900 |
| Flat roof — GRP or EPDM (extension, up to 20m²) | £1,800 – £3,500 |
| Full re-roof — 3-bed semi/terrace | £6,500 – £13,000+ |
| Guttering and fascia replacement (full house) | £800 – £1,800 |
Prices are guide ranges for Harrow, HA1 and HA2. Actual cost depends on access, materials and roof complexity. We provide a free written quote after inspecting the roof, with no call-out fee.
Where We Carry Out Roof Repairs Harrow
Based in Southall, with regular work across Harrow and the surrounding West London postcodes.
Postcodes
Harrow Areas Covered
Harrow and all surrounding streets in HA1 and HA2.
Common Questions About Roof Repairs Harrow
Answers our roofing experts get asked most about roof repairs Harrow before booking. Tap a question to expand it — every answer stays readable even before you click.
GNP Roofing is based in Southall, around 20 to 25 minutes from most Harrow postcodes. For genuine emergencies — active leaks, storm damage, a fallen chimney — we aim to attend within 2 to 4 hours and make the roof watertight the same day. The emergency line is 07424 323113.
Yes. Harrow on the Hill is a conservation area with steep, narrow streets, so we check any planning requirements with Harrow Council and plan access and scaffolding before we start.
Most roof repairs in Harrow cost between £150 and £900. Minor tile or slate repairs run £150 to £400, and lead flashing or chimney repairs range from £300 to £900. Emergency call-outs start from £150. We always provide a free written quote before work begins.
Yes. We work on the 1930s semis common across North Harrow, Rayners Lane and Headstone, and on older terraces in Wealdstone and Greenhill. We match the existing tiles or slate and check whether conservation area rules apply on Harrow on the Hill.
A well-installed pitched roof lasts 40 to 60 years, while flat roof systems such as GRP fibreglass or EPDM rubber last 20 to 30 years. Every new roof carries a signed 10-year workmanship guarantee, plus manufacturer product warranties.
Yes — flat roof replacement on rear extensions is one of our most common West Harrow jobs. We assess the structure, recommend GRP, EPDM or felt depending on the situation, and most extension flat roofs are finished in 1 to 2 days.
Yes. GNP Roofing Building Ltd carries full public liability insurance on every job, and proof of cover is available on request before work begins.
For extensions, GRP fibreglass is usually the strongest option — seamless, low maintenance, with a 25-year warranty. EPDM rubber suits larger flat areas well, while torch-on felt is the most affordable choice for budget-sensitive jobs. We recommend the right system after a free site visit.
Yes. Some older Harrow properties still have original cast iron guttering. We repair, re-seal, re-hang or fully replace it, and where a conservation area requires the period look, we can fit cast iron-effect aluminium instead.
Yes. We replace full guttering runs, fascias, soffits and downpipes across HA1 and HA2, in UPVC, aluminium or cast iron depending on the property. Most jobs are completed in a single day.
Signs pointing to a full re-roof include several sections of slipped or broken tiles, widespread moss under the bedding, failing underlay visible from the loft, leaks that return after previous repairs, or a roof over 50 years old with no replacement history. We inspect for free first and only recommend a re-roof where repairs genuinely won't be enough.
Need Roof Repairs in Harrow, HA1 & HA2?
Call us, WhatsApp us, or send a message. We'll visit your Southall property, assess the work needed, and provide a written quote — completely free and with no obligation. Most quotes are turned around within 24 hours.
ABOUT US
Expert roofers in Southall, West London. Specialist roofing contractors delivering roof repairs, flat roofing, emergency services, and new installations. 15+ years trusted by local homeowners.
CONTACT US
- +447424323113
- info@gnproofingltduk.co.uk
- 94 Scotts Road, Southall, England, UB2 5DE