Lewisham at a glance
- Postcode districts
- SE6, SE13, SE4, SE23, SE26, SE12, SE10, SE20
- Council area
- London Borough of Lewisham
- Building approval
- London Borough of Lewisham 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 Lewisham?
Flat roof replacement
Flat roofs in Lewisham get replaced for the same reasons as anywhere else: the covering has reached the end of its service life, leaks keep returning after repairs, or water ponds because the deck has sagged. Once the boards are soft or the insulation is wet, a full strip usually costs less than another round of patching.
GRP fibreglass roofing
Some Lewisham 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.
Green and sedum roofs
Small commercial buildings and blocks in Lewisham with a flat roof sometimes add an extensive green roof as part of a refurbishment. The structural check and safe access for maintenance matter even more on these larger roofs, which may need edge protection or fall-arrest points for each visit.
All flat roof services in Lewisham:
- Dormer roofs
- Flat roof repairs
- Liquid-applied roofing
- Flat roof replacement
- Green and sedum roofs
- Warm roof insulation upgrades
- Emergency leak repairs
- Torch-on felt roofing
- Balconies and roof terraces
- Flat roof surveys and leak tracing
- Extension and kitchen roofs
- Flats, HMOs and block roofs
- GRP fibreglass roofing
- Commercial flat roofing
- Garage roofs
- EPDM rubber roofing
- Single-ply membrane roofing
How much does a flat roof cost in Lewisham?
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 |
|---|---|
| Extension (20 m²), felt, new deck + insulation | £3,250–£5,600 |
| Porch or bay (4 m²), EPDM | £900–£1,500 |
| Single garage (18 m²), GRP fibreglass | £2,150–£3,900 |
| Commercial roof (100 m²), single-ply + insulation | £15,900–£26,150 |
| Emergency temporary weatherproofing visit | £220–£540 |
What flat roofs are typical in and around Lewisham?
In a town like Lewisham flat roofs are mostly on mansion blocks and purpose-built flats with large flat roofs and kitchen extensions and roof terraces behind period houses. Local weather shapes the specification. 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 Lewisham?
Where approval is needed it goes to London Borough of Lewisham 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 Lewisham do we cover?
Flat roofing in Lewisham: questions
Do you cover Lewisham?
Yes, including postcode districts SE6, SE13, SE4, SE23, SE26, SE12 and 2 more. Send your postcode with your enquiry and we'll arrange a survey.
Is a free survey available in Lewisham?
Yes, for new and replacement roofs. A standalone condition survey or leak investigation report is a paid service.
Do you also cover Southwark?
Yes. Southwark is about 3 miles from Lewisham and we cover it too.
Can you repair a leaking flat roof in Lewisham?
Yes. We trace where the water is actually getting in first, because the leak inside is rarely under the defect outside, then repair with materials compatible with your roof.