Merton at a glance
- Postcode districts
- SM4, SW20, SW19, CR4
- Council area
- London Borough of Merton
- Building approval
- London Borough of Merton building control, or a registered building control approver
- Guide price region
- London (+20% on West Midlands rates)
What flat roof work do we do in Merton?
Flats, HMOs and block roofs
Roof works on a block in Merton affect many households at once. We agree notices, scaffold positions, working hours and a named contact with the agent or freeholder before we start, so residents know what is happening, when it will happen and who to ask if they have a question.
GRP fibreglass roofing
Some Merton homeowners pick GRP for appearance alone. The topcoat comes in several colours, the trims are moulded to match, and the finished roof looks tidy from upstairs windows. With good laying conditions and a sound deck, a GRP roof typically lasts 20 years or more.
Torch-on felt roofing
On larger roofs in Merton with poor falls, torch-on felt pairs well with tapered insulation, which builds the fall into the insulation boards. That deals with ponding properly while adding insulation, rather than patching the low spots and waiting for the next leak.
All flat roof services in Merton:
- Emergency leak repairs
- Single-ply membrane roofing
- GRP fibreglass roofing
- Green and sedum roofs
- Flat roof replacement
- EPDM rubber roofing
- Commercial flat roofing
- Flat roof repairs
- Flat roof surveys and leak tracing
- Garage roofs
- Torch-on felt roofing
- Flats, HMOs and block roofs
- Liquid-applied roofing
- Dormer roofs
- Balconies and roof terraces
- Warm roof insulation upgrades
- Extension and kitchen roofs
How much does a flat roof cost in Merton?
Guide prices at London rates including VAT. New and replacement roofs get a fixed price after a free survey; repair prices are confirmed once we've found the problem.
| Job | Guide price inc VAT |
|---|---|
| Upstand or flashing repair | £300–£780 |
| Emergency temporary weatherproofing visit | £220–£540 |
| Porch or bay (4 m²), EPDM | £900–£1,500 |
| Single garage (18 m²), liquid-applied | £2,450–£3,900 |
| Extension (20 m²), GRP, new deck + insulation | £3,600–£6,450 |
What flat roofs are typical in and around Merton?
In a town like Merton flat roofs are mostly on mansion blocks and purpose-built flats with large flat roofs and shops with flat-roofed stores below flats above. The climate is part of the brief. The Thames basin is one of the drier parts of Britain at roughly 730 mm of rain a year, but summer heat is the bigger test here: dark membranes on south-facing roofs swing a long way in temperature. Approximate 1991–2020 regional averages based on Met Office data.
Who approves flat roof work in Merton?
Where approval is needed it goes to London Borough of Merton building control, or a registered building control approver. Replacing more than half of a roof over a heated room usually counts as renovating a thermal element, so it is insulated to current standards and notified to building control. How the rules work.
Which places near Merton do we cover?
- Sutton · 3 mi
- Wandsworth · 4 mi
- Kingston upon Thames · 5 mi
- Croydon · 5 mi
- Lambeth · 5 mi
- Richmond upon Thames · 6 mi
Flat roofing in Merton: questions
Do you cover Merton?
Yes, including postcode districts SM4, SW20, SW19, CR4. Send your postcode with your enquiry and we'll arrange a survey.
Is a free survey available in Merton?
Yes, for new and replacement roofs. A standalone condition survey or leak investigation report is a paid service.
Do flat roofs in Merton need building control approval?
Often. Replacing more than half of a roof over a heated room usually means insulating it to current standards and notifying building control, and structural changes need approval too. In Merton that's London Borough of Merton building control, or a registered building control approver. We tell you at the survey and handle it.
Do you also cover Sutton?
Yes. Sutton is about 3 miles from Merton and we cover it too.