How we approach smoke vent rooflights (AOVs) in St Helens
Thinking about smoke vent rooflights (AOVs) in St Helens? The short answer: automatic smoke ventilators at the head of stairwells and atria. The longer answer depends on your roof, which is why we survey before we price.
Converted mills and warehouses in the North West often have large rooflights or glass roofs that need specialist replacement. In St Helens, as anywhere, smoke vent rooflights (AOVs) are the usual choice for communal stairwells, corridors and atria.
Jobs in St Helens are planned around access: whether the roof can be reached from the garden, whether a hoist or crane is needed, and where we can park. We check this when we measure.
Specification options
- Rain and wind sensors for daily vent use
- Break-glass and smoke-detector triggers
- Electric (24 V) or pneumatic actuation
- Service and test plans
- Glazed rooflight or louvred vent
- Replacement of failed or obsolete units
- Manual override at the fire service access level
Before you order: points to check
- The product should be certified to BS EN 12101-2 as a natural smoke and heat exhaust ventilator
- Replacing a vent with a non-equivalent product can affect the fire strategy
Building control and safety duties in St Helens
Smoke vents are life-safety equipment: in England the responsible person must keep them maintained under the Regulatory Reform (Fire Safety) Order 2005. We supply manufacturer-certified units and arrange installation, commissioning and servicing through specialist smoke-control engineers.
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. Fire classification of rooflight materials near boundaries is checked at specification.
See our building regulations guide for U-values, glazing limits and self-certification.
What do smoke vent rooflights (AOVs) cost in St Helens?
Prices below are shown including and excluding VAT. In St Helens, as elsewhere, making good inside and access equipment are the main variables.
| 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 |
What happens next
- Get in touch. Use the form, WhatsApp or the guide-price tool with your St Helens address.
- Measure and check. A surveyor visits St Helens, measures and checks structure and access.
- Written price. You receive a fixed price listing the unit, the work and the lead time.
- Fitting and handover. We install, clean down and leave product and warranty documents.
Smoke vent rooflights (AOVs) near St Helens
More we do in St Helens
Smoke vent rooflights (AOVs) in St Helens: 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.
Who is responsible for maintaining smoke vents?
The responsible person (or duty holder in Scotland, appropriate person in Northern Ireland) for the building must keep fire safety systems maintained. We can arrange servicing and keep records.
Can a smoke vent be used for normal ventilation?
Many dual-purpose units also open for daily ventilation, closing automatically in rain.
Can you work alongside my builder in St Helens?
Yes. On new extensions we fit once the opening and upstand are ready and coordinate dates with your builder.
Do you fit smoke vent rooflights (AOVs) in St Helens?
Yes. We survey and fit smoke vent rooflights (AOVs) in St Helens and across Merseyside. Send your postcode and we will offer a survey date when we reply.
