How we approach smoke vent rooflights (AOVs) in Lewisham
Smoke vent rooflights (AOVs) in Lewisham means automatic smoke ventilators at the head of stairwells and atria. We cover the SE13 district and the rest of Greater London, with a survey before any price is fixed.
Mansard and loft conversions are common across London, and roof windows are often set out alongside dormers on the rear slope. In Lewisham, as anywhere, smoke vent rooflights (AOVs) are the usual choice for blocks of flats and commercial buildings with a smoke strategy.
We work across Greater London, including Lewisham, and in neighbouring towns such as Catford and Peckham. Access, parking and how the glass reaches the roof are all checked at the survey.
Choices for your Lewisham project
- Service and test plans
- Glazed rooflight or louvred vent
- Rain and wind sensors for daily vent use
- Electric (24 V) or pneumatic actuation
- Break-glass and smoke-detector triggers
- Replacement of failed or obsolete units
- Glazed units bring daylight to stairwells
What to check first
- Replacing a vent with a non-equivalent product can affect the fire strategy
- Smoke ventilation is designed to the building's fire strategy — we install to that design
Building control and safety duties in Lewisham
Smoke vents are life-safety equipment: in England the responsible person must keep them maintained under the Regulatory Reform (Fire Safety) Order 2005. We install to the building's fire strategy and the manufacturer's certification.
For buildings other than dwellings, Approved Document L Volume 2 sets limiting U-values of 2.2 W/m²K for rooflights and 3.0 W/m²K for roof ventilators, including smoke vents. Fragile-roof safety and access are planned before work starts.
See our building regulations guide for U-values, glazing limits and self-certification.
What do smoke vent rooflights (AOVs) cost in Lewisham?
These are typical supply-and-fit ranges. For an address in Lewisham, scaffold, a hoist for heavy glass, or a new structural opening can move the figure, which is why we survey first.
| Option | Guide price inc VAT | Ex VAT |
|---|---|---|
| Large glazed AOV with actuators | £4,795 – £7,795 | £3,995 – £6,495 |
| Standard glazed AOV Typical | £3,595 – £4,795 | £2,995 – £3,995 |
| Replacement vent onto existing upstand | £2,995 – £3,595 | £2,495 – £2,995 |
The process, step by step
- Send the details. Postcode, rough size and a photo of the roof and room.
- Free site visit. For new installs we survey free, measure and confirm the roof detail.
- Agree the quote. You approve the specification and price before anything is ordered.
- Installation day. Usually one day into a prepared opening, longer for new openings.
Smoke vent rooflights (AOVs) near Lewisham
Other services in Lewisham
Common questions
Do you design the smoke strategy?
No — the strategy comes from the building's fire engineer or designer. We supply, install, commission and service to it.
Can a smoke vent be used for normal ventilation?
Many dual-purpose units also open for daily ventilation, closing automatically in rain.
How often should AOVs be tested?
Industry guidance recommends regular functional checks and at least annual servicing. Your fire risk assessment sets the regime.
Do I need to be at home for the survey in Lewisham?
Yes — someone needs to let us into the room below and, where possible, show us how the roof is reached.
Do you fit smoke vent rooflights (AOVs) in Lewisham?
Yes. We survey and fit smoke vent rooflights (AOVs) in Lewisham and across Greater London. Send your postcode and we will offer a survey date when we reply.
