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Freshly laid Restec fibreglass on a communal walkway in Greenwich

Roofing services

Flat Roofing in Sidcup, Greenwich & Kent

Flat roofs fail more often than pitched roofs, almost always because of the material or the detailing. We cover all aspects of flat roofing across Sidcup, Greenwich and Kent — felt systems, Restec liquid systems and rubber systems — on extensions, garages, dormers, balconies and communal walkways, with every outlet, upstand and edge sealed properly.

Three systems, and when we use each

Restec liquid systems. We are Restec certified, and a liquid system gives a seamless, hard-wearing surface with no joints to fail. It can be finished with quartz chippings for foot traffic, which makes it our first choice for walkways, balconies and any roof people need to walk on. Our Greenwich project used a three-layer Restec build over failing asphalt — Restec themselves featured it on their own channels.

Rubber systems. A single-sheet EPDM membrane goes down quickly with very few joints, and it is an excellent, long-lasting choice for garages, extensions and larger simple roofs.

Felt systems. High-performance torch-on felt remains a cost-effective and genuinely durable option, particularly for repairs, smaller roofs and outbuildings where the budget matters.

We will tell you honestly which of the three suits your roof, how it will be used and what you want to spend — not simply quote for whichever we prefer to fit.

The details that stop flat roofs leaking

Most flat roof leaks start at the edges: at upstands against walls, around outlets, at drip edges and where the roof meets a pitched roof or parapet. We form these details carefully, use the correct trims and make sure the roof falls to its outlets so water does not pond.

From our recent work

Common problems

Problems our flat roofing service solves

  • Ponding water

    Standing water after rain means the roof has no fall and the covering will degrade quickly.

  • Cracked or blistered felt

    Old felt splits in the sun and blisters as trapped moisture expands.

  • Leaks at upstands and outlets

    The most common failure point on any flat roof, usually poor original detailing.

  • Failed asphalt walkways

    Communal walkways on flats crack and let water through to the flats below.

  • Damp in an extension or garage

    Often traced to a flat roof at the end of its life.

  • Moss and vegetation

    Plant growth in a flat roof is a sign the surface is holding water.

Our approach

How we handle flat roofs

  1. 01

    Inspection

    We check the deck, the falls, the existing covering and every detail for the cause of any problem.

  2. 02

    Recommendation

    We recommend GRP, EPDM or felt based on the roof, its use and your budget, and quote in writing.

  3. 03

    Preparation

    The existing covering is stripped or prepared and the deck repaired or replaced where needed.

  4. 04

    Installation

    The new system is laid with all edges, upstands and outlets formed correctly and tested before we leave.

Recent projects

Recent flat roofing projects

Genuine photographs from our own jobs.

All projects
Finished fibreglass walkway in Greenwich with quartz non-slip surface and outlet
Walkway in Greenwich with fibreglass matting laid over the old asphalt
Before After
Walkway during laminating and with the finished quartz surface

Greenwich

Fibreglass walkway over asphalt, Greenwich

A failed asphalt walkway on a block of flats waterproofed with a three-layer Restec fibreglass system and finished with quartz for a non-slip surface.

View project

Customer reviews

What homeowners say

Every customer is invited to leave a review on our Facebook page. Here is what they have said.

100% recommend 6 reviews on Facebook

“Excellent advice and service. Good quality work and care and attention to completing the work. Very pleased with the end result. Would definitely recommend.”

C
Carl Schiess

Facebook recommendation · August 2026

“Brilliant service from start to finish. The team were professional, polite and the quality of work is outstanding. Highly recommend!”

H
Homeowner, Kent

Customer testimonial · September 2026

FAQs

Flat Roofing FAQs

Do you install flat roofs?
Yes — we cover all aspects of flat roofing. We fit felt systems, Restec liquid systems (we are Restec certified) and rubber systems on extensions, garages, dormers, balconies and walkways across Sidcup, Greenwich, Bexley and Kent.
How long does a liquid or fibreglass roof last?
A correctly installed liquid GRP roof typically lasts 25 years or more. It has no seams to fail and can be re-coated later in life to extend it further.
Can a flat roof be overlaid rather than replaced?
Sometimes. Our Greenwich walkway was overlaid with GRP on top of sound asphalt. If the existing deck is wet or rotten, though, it needs to come out first. We will tell you which applies.
Can a flat roof be made walkable?
Yes. GRP can be finished with quartz chippings for a durable non-slip surface, which is what we did on the Greenwich walkway.

Request a flat roofs quote

Tell us a little about the job and we’ll get back to you as soon as we can. Prefer to talk? Call 07498 310928.

So we can confirm we cover your area.

Got photos of the problem? Send them on WhatsApp to 07498 310928 — quickest from a phone, and it helps us price the job before we visit.

We’ll only use your details to respond to your enquiry. See our privacy policy.

Hipped bungalow roof in Sidcup newly tiled in grey Redland 49 tiles

Let’s talk about your roof

Need a reliable local roofer?

Get in touch today to discuss your roofing project and request a free quotation.

Or call 07498 310928 · rwroofingservices95@yahoo.com

Call now Free quote