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Flat Roofing in Orpington & Bromley

Felt, EPDM rubber, GRP fibreglass and single-ply membrane systems for extensions, garages, dormers and commercial roofs. Every installation carries guarantees of up to 20 years on approved systems. The right system depends on your building, how you use it and your budget, so we never fit a one-size-fits-all product.

The right system for your roof

A tired flat roof pooling water or showing splits and blisters will only get worse. The good news? Modern flat-roof systems are a world away from old felt. They're seamless, resilient and long-lasting.

Standing water is often the first sign of a problem. Consequently, we always check for ponding as part of the initial assessment, not just the obvious splits and blisters.

We install and repair every major flat-roofing system. Crucially, we advise you honestly on which one suits your building, its use and your budget. We don't fit a one-size-fits-all product.

Felt is the most cost-effective option for many smaller jobs. In contrast, EPDM and single-ply systems suit larger or higher-traffic roofs better.

Access matters too, particularly on rear extensions in tightly built terraces. Reaching a flat roof safely there can take longer than on a garage with clear access all round. That's why every quote follows a proper site visit rather than a guess from a photo.

Our flat roof systems comparison is a useful starting point. We can often survey and quote a garage roof in a single short visit. Still, access on a terraced rear extension sometimes takes a little longer to plan properly.

Ageing felt on rear extensions is one of the most common jobs we deal with, and it's often further along than it first appears from the ground. We check for blistering, perished edges and standing water during every survey. These are usually the earliest signs a flat roof needs attention.

Ideal for

  • Single-storey & side extensions
  • Garages & outbuildings
  • Dormer roofs
  • Balconies & terraces
  • Commercial & industrial roofs
  • Roof lanterns & skylights
Seamless & watertight
Modern membranes give a joint-free, fully bonded finish.
Up to 20-year guarantee
Manufacturer-approved installs on single-ply systems.
Domestic & commercial
From a garage to a warehouse roof — we cover both.

Flat roof systems we fit

Torch-on felt

Cost-effective, proven bitumen system — a solid choice for garages and outbuildings.

EPDM rubber

Seamless single-piece rubber membrane. Durable, flexible and low-maintenance.

GRP fibreglass

Hard-wearing, seamless glass-reinforced finish — ideal for extensions and balconies.

Single-ply membrane

Long-life system for larger and commercial roofs, with guarantees up to 20 years.

Flat roofing FAQs

What is the best type of flat roof — felt, EPDM, GRP or single-ply? +
Modern torch-on felt is cost-effective and reliable. EPDM rubber and GRP fibreglass give long, seamless, low-maintenance finishes, ideal for extensions and garages. Single-ply membranes suit larger and commercial roofs and carry the longest guarantees. We recommend the right system for your roof and budget.
How long does a flat roof last? +
It depends on the system. Good felt lasts around 15–20 years. EPDM and GRP can last 25–30+ years. Single-ply membranes give the longest service of all, with warranties of up to 20 years or more.
How much does flat roof repair or replacement cost? +
Cost depends on size, the system chosen and access. A small garage roof is modest; a larger extension or commercial roof costs more. We survey first and give a fixed quote — no surprises.
Can you install a roof lantern or skylight on a flat roof? +
Yes. We regularly fit roof lanterns and skylights into flat-roof extensions. We form the correct kerb and weatherproof detailing around each one, so it stays watertight.
Can a flat roof be insulated to meet Building Regulations? +
Yes. We build warm-roof and cold-roof constructions with the correct insulation and ventilation to meet current Building Regs U-values.

Local roofing areas we cover

We carry out this service across Orpington, Bromley and the surrounding Kent and South East London towns. Our team is based locally, so we can usually get a surveyor out fast, wherever you are. Flat roofs are common on rear extensions throughout this area. Therefore, it's one of the services we're asked about most often.

Planning a new flat roof?

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Written by Tecta Roofing · page last updated