How we approach smoke vent rooflights (AOVs) in Hatfield
Thinking about smoke vent rooflights (AOVs) in Hatfield? 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.
Larger gardens in much of the South East mean deeper rear extensions, and deeper rooms need light from above rather than only from the doors. Smoke vent rooflights (AOVs) suit blocks of flats and commercial buildings with a smoke strategy.
Hatfield is around 17 km from Watford, and we survey and fit throughout that part of Hertfordshire, including the AL10 district.
Specification options
- Glazed rooflight or louvred vent
- Service and test plans
- Electric (24 V) or pneumatic actuation
- Rain and wind sensors for daily vent use
- Control panel with battery backup
- Also usable for day-to-day ventilation
- Replacement of failed or obsolete units
Before you order: points to check
- The product should be certified to BS EN 12101-2 as a natural smoke and heat exhaust ventilator
- Whoever holds the building's fire-safety duties (the responsible person, the duty holder in Scotland or the appropriate person in Northern Ireland) must keep systems maintained and tested
Rules and responsibilities in Hatfield
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.
Our planning guide covers each nation in more detail.
What do smoke vent rooflights (AOVs) cost in Hatfield?
These are typical supply-and-fit ranges. For an address in Hatfield, 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.
- Fixed quote. Product, work and price in writing — nothing is ordered until you agree.
- Installation day. Usually one day into a prepared opening, longer for new openings.
Smoke vent rooflights (AOVs) near Hatfield
More we do in Hatfield
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 you replace an old smoke vent?
Yes, with an equivalent certified unit that matches the original design area and performance, so the fire strategy is not compromised.
Do smoke vents need a control panel?
Electric AOVs work with a control panel that links them to detectors, the fire alarm and override switches.
How do I book a survey in Hatfield?
Send your postcode and, if you can, a photo of the roof and the room. We offer a survey date when we reply.
Do you fit smoke vent rooflights (AOVs) in Hatfield?
Yes. We survey and fit smoke vent rooflights (AOVs) in Hatfield and across Hertfordshire. Send your postcode and we will offer a survey date when we reply.
