How we approach smoke vent rooflights (AOVs) in Welwyn Garden City
Smoke vent rooflights (AOVs) in Welwyn Garden City means automatic smoke ventilators at the head of stairwells and atria. We cover the AL8 district and the rest of Hertfordshire, with a survey before any price is fixed.
Across the South East, single-storey kitchen extensions on 1930s semis and post-war detached houses are where most flat rooflights and lanterns go. Smoke vent rooflights (AOVs) suit communal stairwells, corridors and atria.
Welwyn Garden City is around 21 km from Watford, and we survey and fit throughout that part of Hertfordshire, including the AL8 district.
Options we can specify in Welwyn Garden City
- Rain and wind sensors for daily vent use
- Service and test plans
- Break-glass and smoke-detector triggers
- Glazed rooflight or louvred vent
- Electric (24 V) or pneumatic actuation
- Replacement of failed or obsolete units
- Opens automatically on alarm signal
Before you order: points to check
- The product should be certified to BS EN 12101-2 as a natural smoke and heat exhaust ventilator
- Smoke ventilation is designed to the building's fire strategy — we install to that design
Regulations for smoke vent rooflights (AOVs) in Welwyn Garden City
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.
Smoke vent rooflights (AOVs) prices in Welwyn Garden City
Prices below are shown including and excluding VAT. In Welwyn Garden City, 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 |
From enquiry to finished job
- Tell us what you have. Send the AL8 postcode, a rough size and a couple of photos.
- 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.
- Fit and make good. We fit, seal, test and finish the reveal, then hand over the paperwork.
Smoke vent rooflights (AOVs) near Welwyn Garden City
Other services in Welwyn Garden City
Common questions
How often should AOVs be tested?
Industry guidance recommends regular functional checks and at least annual servicing. Your fire risk assessment sets the regime.
Can a smoke vent be used for normal ventilation?
Many dual-purpose units also open for daily ventilation, closing automatically in rain.
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.
How do I book a survey in Welwyn Garden City?
Send your postcode and, if you can, a photo of the roof and the room. We offer a survey date when we reply.
Do I need to be at home for the survey in Welwyn Garden City?
Yes — someone needs to let us into the room below and, where possible, show us how the roof is reached.
