⚡ Emergency roof repairs available 24/7 — Call now: 01273 973 996
⭐ 4.9/5 · 127 Google Reviews · GRP Fibreglass & EPDM Specialists

Flat Roofing in Lewes

Reliable flat roofing across Lewes, matched to the local stock — tile-hung house off School Hill — with the price in writing before we start and no call-out fee.

📞 Call Now: 01273 973 996

Tell us the job in 30 seconds. No pushy sales, no call-out fee.

20+
Years Local
127
5★ Reviews
24/7
Emergency
10yr
Guarantee
NFRC Registered
Fully Insured
10 Year Guarantee
Free Quotes
No Hidden Costs
Flat Roofing in Lewes

Flat Roofing in Lewes

Wind-driven tile displacement on High Street ridge properties is the most frequent emergency call. The flat roofs on Lewes's extensions, garages and outbuildings require the right material specification for local conditions. We install GRP as our first choice in exposed positions.

Flat Roof Drainage in Lewes — Getting It Right

Ouse Valley position creates wind funnelling during south-westerly storms — Channel gales are channelled and accelerated through the gap in the South Downs. Properties on the High Street ridge face maximum exposure. Valley floor humidity near the river accelerates biological growth. Correct fall and drainage specification is critical in Lewes's rainfall pattern. We survey the existing structure, assess drainage routes, and specify falls that clear the roof surface within 24 hours of rainfall stopping.

Deck Inspection — What We Find Under the Old Roof

We always strip to the deck before installation. Common findings on Lewes properties: saturated OSB or plywood deck from years of felt failure; joist rot from sustained moisture; inadequate insulation. We document all findings before quoting for extra work — never proceed without your agreement.

Maintenance for Lewes Flat Roofs

A GRP flat roof in Lewes requires minimal maintenance — an annual inspection and clearing of any debris from outlets. EPDM requires lap joint inspection every 2-3 years in East Sussex conditions. We carry out free annual inspections for all flat roofing customers for the first 5 years after installation.

Flat Roofing Costs in Lewes
GRP fibreglass (per sqm installed)£70 - £90
EPDM rubber (per sqm installed)£55 - £75
Kitchen extension (20-25 sqm)£1,400 - £2,250
Garage (20-30 sqm)£1,400 - £2,700
Larger area (40-60 sqm)£2,800 - £5,400
Call for a Free Quote: 01273 973 996
Customer Reviews

What Lewes Homeowners Say

★★★★★

“Old felt roof on the extension had been leaking for two years. GRP installed in a day and a half. Looks completely different and I have no doubt it will outlast everything else on the property.”

Catherine F. · Keere Street, Lewes
★★★★★

“Replaced the garage felt with GRP. Quick, tidy and they found some deck rot I wasn't aware of — fixed it and showed me before proceeding. Honest job.”

Robert L. · Southover, Lewes
★★★★★

“Third flat roof replacement in 30 years on the same extension. Went with GRP this time on their advice. Should be the last time I ever need to do it.”

Anne M. · Nevill estate, Lewes

Is Flat Roofing the Right Fix?

In Lewes, most flat roofing jobs announce themselves before you ever get on the roof. Flat roofs fail differently from pitched roofs — the signs are ponding, splits and lifting laps rather than slipped tiles.

Tell-tale signs on a Lewes roof:

When it is not the answer: If a GRP or EPDM roof is only 10 years old with a single split, a localised repair is usually right — replacement would be premature — see our guide.

Comparison diagram of warm deck and cold deck flat roof construction
Warm deck vs cold deck — where the insulation sits changes how a flat roof performs.
Local Knowledge

What Makes Lewes Different

The Housing Stock

Georgian townhouses on the High Street and Keere Street, Victorian terraces in Southover, Edwardian semis on the Nevill estate. Handmade clay plain tile and Horsham stone slab on historic stock. Conservation area requirements mandate like-for-like matching throughout the Lewes Old Town..

Climate and Exposure

Ouse Valley wind funnelling amplifies Channel gales through the South Downs gap. High Street ridge properties face maximum exposure..

The Key Issue in Lewes

Wind funnelling through the Ouse Valley gap creates storm conditions more severe than equivalent coastal towns. High Street properties lose ridge tiles in storms that cause no damage in Brighton..

Pricing note: Horsham stone is rare and expensive to source — budget for premium material costs on historic Lewes properties..

How It Works

Our Flat Roofing Process in Lewes

Every job follows the same clear process — no surprises, no hidden costs, full communication throughout.

1
Free Flat Roof Survey

We inspect the existing membrane, check drainage falls, assess the deck condition and identify any structural issues before quoting.

2
Strip to Deck

All existing felt or membrane stripped. Deck inspected thoroughly — any rot or saturation documented and quoted for before work proceeds.

3
Deck Preparation

Deck repaired or replaced where needed. Any drainage issues corrected. Falls assessed and improved where possible.

4
GRP or EPDM Installation

New membrane installed to manufacturer specification. GRP: full lamination across the entire deck as a single membrane. All upstands, outlets and penetrations correctly detailed.

5
Completion and Guarantee

10-year written workmanship guarantee issued. Free annual inspection for the first 5 years after installation.

How Long Does It Take?

As a guide to what to expect in Lewes, typical job times run:

JobTypical duration
Localised felt repair1–3 hours
Small extension / garage roof (GRP)1–2 days
EPDM rubber recover1–2 days
Warm-deck build-up (per roof)2–4 days
Full strip & re-lay2–4 days

In Lewes, gRP and warm-deck systems need dry, mild conditions to cure — we book them into settled windows and never lay resin onto a wet deck.

Scaffold, Skips & Street Access in Lewes

Access shapes every Lewes quote: most flat roofs are reached from a tower or ladder; scaffold is needed only where the roof is at height or edge protection is required. Scaffold is specified for first-floor or higher flat roofs, and anywhere an exposed edge needs protection — always itemised in your written quote, never a hidden extra, and we arrange it.

In Lewes, Lewes is a historic county town of listed, timber-framed and tile-hung buildings, with steep narrow twittens making access and material-matching demanding. Pavement scaffold and skip permits go through Lewes District Council; allow a few working days on streets like Keere Street, Church Twitten, School Hill where space is tight.

Lewes Flat Roofing: Cost Guide

What you can expect to pay in Lewes, before your fixed written quote:

JobTypical rangeNotes
Localised felt repair£150–£350Per visit
Garage / small extension (GRP)£800–£2,000Fibreglass, one-piece
EPDM rubber roof£1,200–£3,000Single-ply, long life
Warm-deck build-up£2,000–£4,500Insulated, Building Regs
Full strip & re-lay (large)£3,000–£6,000Size dependent

What moves the price in Lewes

Worked example: A new GRP garage roof on a tile-hung house off School Hill typically runs around £1,400, including access and waste.

For Lewes homeowners: no deposit on small repairs. Staged payments on larger flat-roof projects, materials-on-site first.

Your Guarantee, Explained

On Lewes roofs, our workmanship is backed by a written 10-year guarantee, with manufacturer warranties on materials on top — in writing, every time.

A covered fault means we return and fix it at our cost — that is what the guarantee is for.

Living Around the Work in Lewes

Usually a quiet one- to two-day job over an extension or garage — minimal mess, and we clear the old covering as we go. You do not need to stay home for external work — we just need power and access agreed in advance.

Felt and EPDM can be laid in cooler weather; GRP needs mild, dry conditions to cure, so we plan resin work around the forecast. Locally, set in the Ouse valley gap through the Downs, Lewes funnels wind and holds valley damp, and its heritage roofs need traditional care.

FAQ

Flat Roofing Lewes — Frequently Asked Questions

GRP fibreglass is our recommendation for most Lewes properties. It forms a seamless, jointless membrane with no lap joints to fail, resists UV well, and has an expected life of 30-40 years. EPDM is suitable for sheltered positions. Traditional felt is not recommended for East Sussex conditions.

GRP fibreglass is £70-90 per sqm installed. A typical kitchen extension (20-25 sqm) costs £1,400-£2,250. A double garage (40 sqm) costs £2,800-£3,600. All prices include stripping the old felt and debris disposal.

GRP fibreglass correctly installed lasts 30-40 years in East Sussex conditions. EPDM lasts 20-30 years. Traditional felt lasts 8-12 years. The significant lifespan difference justifies the higher upfront cost of GRP for most customers.

Replacing a flat roof with the same material and specification is permitted development. Changing the roof type (e.g. adding a raised parapet or changing the drainage system significantly) may require planning approval. We advise on this during the free survey.

Yes — this is the most common flat roofing job we carry out. We strip all existing felt, inspect and repair the deck if needed, and install a GRP system directly over the existing structure in most cases.

10-year written workmanship guarantee on all GRP and EPDM installations. The GRP material itself carries a manufacturer guarantee of 25 years.

We cover Lewes and the surrounding area including Brighton, Newhaven, Seaford. Call 01273 973 996 to arrange a free survey.

Further Reading

Related Guides

How Long Does a Flat Roof Last in Coastal Conditions? → GRP vs EPDM: Which is Right for Brighton? → Best Roofing Materials for Coastal Properties →
LEWES

Free Quote for Flat Roofing in Lewes

No call-out fee. No obligation. Honest quote from a local roofer.

01273 973 996

© 2025 Brighton Roofing Experts · Lewes, East Sussex · 01273 973 996

NFRC Registered · Fully Insured · 10-Year Guarantee