Flat Roofing in Chiswick
Amvi Roofing provides flat roofing in Chiswick, installing and repairing flat roofs across the W4 postcode. We replace failing felt and asphalt with modern EPDM rubber and GRP fibreglass. For example, we work on rear extensions, dormers, garages and outbuildings from Bedford Park to Gunnersbury.
Local Flat Roofing
Flat Roofing Across Chiswick
In fact, flat roof extensions are probably the most common roofing feature on Chiswick’s streets. Many Victorian terraces, Edwardian houses and 1930s semis here have single-storey rear extensions. These include kitchens and utility rooms, as well as downstairs bathrooms and garden rooms. Most were built with flat roofs. However, those roofed between the 1960s and 1980s used three-layer felt, which lasts only 15 to 20 years.
Many Chiswick flat roofs have not been replaced since. As a result, the felt has cracked at the laps, blistered and stopped shedding water properly. The most common failure point is where the flat roof meets the house wall. There, the flashing peels away, so water tracks behind the junction and damp appears inside.
In Bedford Park, flat roofs also appear on side returns and infill extensions, as well as over bay windows. These need particular care in conservation areas. Although the roof itself may be hidden from the street, the flashing and edge trim must still suit the building. We advise on the best system during the inspection.
Grove Park’s 1930s semis, on the other hand, often have flat-roof garages beside the house, as well as later rear extensions. These are our simplest W4 replacements. First we strip the old felt and check the deck, then we install EPDM or GRP with proper falls.
What Our Chiswick Flat Roofing Service Includes
- Rear extension roofs — The most common job in Chiswick. We strip old felt, repair the deck and install EPDM or GRP with correct falls. We also handle the upstand and flashing at the house wall, because this detail usually fails first.
- EPDM rubber roofing — Single-piece membrane with no seams or joints. It bonds to the deck without flame and is manufacturer-backed to 50 years or more. As a result, it is the standard choice for most Chiswick flat roofs.
- GRP fibreglass roofing — Seamless resin-and-glass system for roofs that are walked on, such as balconies and roof terraces. It also suits complex shapes on period properties.
- Felt flat roof repairs — Patching blisters, resealing laps and making local repairs when a roof is not yet ready for replacement. We will also tell you honestly whether a repair is worthwhile.
- Dormer roofs — Waterproofing flat-top dormers with EPDM or GRP, as well as lead flashing at the main roof. These are especially common on Victorian and Edwardian houses.
- Bay window tops — Replacing the flat covering over bay windows, since these small areas often leak on W4 terraces.
- Garage roofs — Replacing old felt on garage roofs, particularly across Grove Park and Gunnersbury.
- Side return and infill roofs — Flat roofing for side-return extensions and infill builds between outrigger wings on Victorian terraces.
EPDM vs GRP — Which System for Your Chiswick Property?
EPDM rubber suits the majority of Chiswick's flat roofs — rear extensions, garage tops, dormer roofs and outbuildings where the surface is not regularly walked on. It is a single sheet of rubber, so there are no joints to fail. It also absorbs thermal movement without cracking and resists UV, with a manufacturer-backed life of over 50 years. In addition, installation uses no open flame, which matters above occupied rooms.
GRP fibreglass is the better choice for flat roofs that will bear foot traffic — a roof terrace, a usable balcony, or a flat roof accessed for maintenance. This is because the cured fibreglass creates a rigid, seamless surface that withstands regular walking. It also suits complex roof shapes, since a rigid surface holds its profile better than a flexible membrane.
Where flat roof details are visible in a conservation area, such as edge trim on a Bedford Park house, we then advise on the best system.
Our Process
- Free inspection — We visit your Chiswick property and check the flat roof, deck and falls. Then we discuss any conservation considerations.
- Written quote — A fixed price detailing the system, materials and timescale. No call-out charge, no obligation.
- Installation — We strip the old covering and repair the deck. Then we build in proper falls and install the new system, usually within one to two days.
- Clean-up and guarantee — All waste is removed and the roof inspected. Finally, you receive a written guarantee as well as the manufacturer's warranty.
Recent Flat Roofing Work in Chiswick
Photos and descriptions of completed Chiswick flat roofing jobs will be added as work is completed. Visit our portfolio for examples across West London.
Why Choose Amvi Roofing
The standards we hold on every project — reliable workmanship you can trust.
Skilled Local Team
Experienced roofers who handle every stage of the job themselves — quality stays consistent from start to finish.
Clear Written Quotes
Detailed breakdown of labour, materials and timescales. No surprises — the figure we give is the figure you pay.
Workmanship Guarantee
Every completed project is backed by a written guarantee, with manufacturer warranties on materials where they apply.
Fully Insured
Public liability cover on every site. Insurance documents available before work begins if you need them.
How it Works
Simple, Straightforward Process
Getting your roof sorted with us is easy. So here’s what happens from your first call to job complete. For guidance on choosing a roofing contractor, see the National Federation of Roofing Contractors.
Survey & Quote
First, a free, no-obligation survey by one of our own team, followed by a clear written quote with no hidden extras.
Installation
Then our in-house team carries out the work to schedule, with scaffold, protection and quality materials handled properly.
Sign-Off & Guarantee
Finally, a full inspection and site clean-up, as well as a written workmanship guarantee once the job is complete.
What Customers Say
Don't Just Take Our Word for It
Here’s what some of our customers across West London have said about working with us.
FAQs
Chiswick Flat Roofing Questions Answered
How much does flat roofing cost in Chiswick?
Every flat roof gets a free inspection and a fixed written quote. Costs depend on the size and system, as well as the condition of the deck. We do not add hidden charges — the quoted price is the price you pay.
How long does a flat roof replacement take in Chiswick?
Most single-storey extension roofs are completed in one to two working days. Garage roofs are typically a single day. However, larger jobs, such as dormers or multi-section roofs, may take two to three days. The timescale is confirmed in the written quote.
My rear extension leaks at the wall junction — can this be fixed without replacing the whole roof?
Sometimes. If the covering is still sound and only the flashing has failed, we can then repair the flashing alone. However, if the felt or membrane across the roof is also deteriorating, a full replacement is the better investment. We assess this honestly during the inspection and explain your options.
Do I need to worry about conservation area rules for a flat roof in Chiswick?
Generally, flat roofs on rear extensions and garages cannot be seen from the street. So replacing the covering with EPDM or GRP does not need planning permission, even in conservation areas. However, where edge details are visible, especially in Bedford Park, the trim and flashing may need to suit the building. We advise on this during inspection.
Is your flat roofing work guaranteed?
Yes. Every installation comes with a written workmanship guarantee plus the manufacturer's material warranty on EPDM or GRP systems.
Nearby Areas
Flat Roofing in Nearby West London Towns
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Amvi Roofing Ltd provides expert flat, pitched, tiled and slate roofing across West London and beyond. Fully insured, in-house team, written guarantees — quality you can trust.
