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★ 4.9/5 · GRP & EPDM Specialists · 25-Year Systems

Flat RoofingEastleigh

Flat-roofed rear extensions are extremely common across Eastleigh's Victorian terraces and post-war semis. Ageing felt systems on these roofs deteriorate steadily and become uneconomical to patch after 12 to 15 years. We install GRP fibreglass and EPDM rubber flat roofing systems that last 25 years or more across all of SO50.

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Flat Roofing in Eastleigh

Flat-roofed single-storey extensions are a feature of almost every era of Eastleigh's housing stock. The Victorian terraces near the town centre typically had kitchen extensions added at the rear in the mid-20th century — most with felt flat roofs now well past their service life. The 1960s and 1970s housing further out often incorporated flat-roofed garages as standard construction.

GRP Fibreglass Flat Roofing in Eastleigh

GRP is our primary recommendation for most Eastleigh residential flat roofs. It is a seamless system with no joints for water to penetrate — critical on small residential roofs where drainage is slow. A professionally installed GRP flat roof carries a manufacturer-backed guarantee and requires no maintenance for 25-plus years.

EPDM Rubber Flat Roofing in Eastleigh

EPDM single-ply rubber membrane is our preferred choice for larger flat roof areas over 30 square metres. It handles temperature variation well and performs exceptionally in the damp Hampshire climate. Like GRP, a correctly installed EPDM roof requires no ongoing maintenance.

Flat Roof Replacement on Eastleigh Extensions

Many of the rear extensions on Eastleigh's post-war semis have had felt roofs patched and repatched over 40 to 50 years. At that point the deck boards often need inspection and partial replacement as well. We assess the full condition of the roof structure before quoting and include all necessary deck work in our price.

Flat Roofing Costs in Eastleigh

Small extension (under 15m²): £900–£1,800 · Medium (15–30m²): £1,800–£3,500 · Large (30m²+): £3,500–£6,000. Includes deck inspection and any necessary board replacement.

Customer Reviews

What Local Homeowners Say

★★★★★

"Felt flat roof on our rear extension in Eastleigh had been patched four times over 20 years. GRP system installed in a day. Completely different — no more annual patch calls."

Sandra K. · Newtown Road, Eastleigh
★★★★★

"Garage flat roof was leaking at the edge joint. They replaced the full roof with EPDM, reseated the trim and sorted the drainage fall. Excellent finish."

Paul V. · Bishopstoke, Eastleigh
★★★★★

"Extension flat roof needed deck boards replacing as well as the membrane. They identified the rot during survey, included it in the quote and did the whole job in one visit. No extras."

Claire F. · Fair Oak, Eastleigh

Flat Roofing Conditions in Eastleigh

The flat-roofed extensions and garages in Eastleigh span a range of ages and conditions. In Itchen valley humidity from Bishopstoke, felt systems deteriorate faster than in drier inland areas — moisture cycling accelerates blistering and membrane cracking. Most felt flat roofs in Eastleigh that have not been replaced in the last 15 years are now past the point where patching is economical. GRP or EPDM replacement eliminates ongoing maintenance costs in a single installation.

GRP vs EPDM for Eastleigh Properties

GRP fibreglass is our primary recommendation for most Eastleigh residential flat roofs under 30 square metres — seamless, no maintenance, manufacturer-backed guarantee for 25-plus years. For larger flat roof areas over 30 square metres, EPDM single-ply rubber membrane is our preferred system — it handles thermal movement across large areas better than GRP and costs slightly less. Both systems perform equally well in Itchen valley humidity from Bishopstoke.

Deck Inspection in Eastleigh

On most Eastleigh flat roofs we survey, the deck boards show some deterioration — particularly at perimeter edges and any areas where water has repeatedly ponded. We inspect the deck during every survey and include all necessary board replacement in the quote before work begins. Discovering rotten deck boards after installation has started is the most common source of unexpected costs on flat roof jobs — our pre-start survey eliminates that uncertainty.

Flat Roofing Conditions in Eastleigh

The flat-roofed extensions and garages in Eastleigh span a range of ages and conditions. In Itchen valley humidity from Bishopstoke, felt systems deteriorate faster than in drier inland areas — moisture cycling accelerates blistering and membrane cracking. Most felt flat roofs in Eastleigh that have not been replaced in the last 15 years are now past the point where patching is economical. GRP or EPDM replacement eliminates ongoing maintenance costs in a single installation.

GRP vs EPDM for Eastleigh Properties

GRP fibreglass is our primary recommendation for most Eastleigh residential flat roofs under 30 square metres — seamless, no maintenance, manufacturer-backed guarantee for 25-plus years. For larger flat roof areas over 30 square metres, EPDM single-ply rubber membrane is our preferred system — it handles thermal movement across large areas better than GRP and costs slightly less. Both systems perform equally well in Itchen valley humidity from Bishopstoke.

Deck Inspection in Eastleigh

On most Eastleigh flat roofs we survey, the deck boards show some deterioration — particularly at perimeter edges and any areas where water has repeatedly ponded. We inspect the deck during every survey and include all necessary board replacement in the quote before work begins. Discovering rotten deck boards after installation has started is the most common source of unexpected costs on flat roof jobs — our pre-start survey eliminates that uncertainty.

FAQ

Frequently Asked Questions

GRP fibreglass for most residential extensions under 30m² — seamless, low maintenance, 25-year guarantee. EPDM for larger areas. We advise on the best option for your specific roof after a free inspection.

Most residential flat roof replacements in Eastleigh are completed in one day. Larger roofs or those requiring deck board replacement may take two days. We give you a clear programme in the quote.

Depends on age and material. GRP and EPDM can often be repaired if the problem is localised. Felt that is over 12 to 15 years old and showing widespread blistering or cracking is usually better replaced. We inspect and advise honestly.

Yes. We carry out flat roofing work across all of SO50 including Eastleigh, Bishopstoke, Fair Oak and Chandler's Ford. Free survey and quote on all jobs.

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