Smoke vent rooflights (AOVs) for Dorchester: the essentials
Our smoke vent rooflights (AOVs) service in Dorchester covers automatic smoke ventilators at the head of stairwells and atria. Every job starts with a survey of the opening, the roof covering and the room below, and a fixed written price.
Barn and chapel conversions in the South West often need bespoke or shaped rooflights to suit the original structure. In Dorchester, as anywhere, smoke vent rooflights (AOVs) are the usual choice for communal stairwells, corridors and atria.
Dorchester sits about 12 km from Weymouth and 23 km from Bridport, and we cover the whole DT1 postcode district and the roads in between.
What you can choose
- Glazed rooflight or louvred vent
- Service and test plans
- Electric (24 V) or pneumatic actuation
- Control panel with battery backup
- Break-glass and smoke-detector triggers
- Manual override at the fire service access level
- Also usable for day-to-day ventilation
Before you order: points to check
- 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
- The product should be certified to BS EN 12101-2 as a natural smoke and heat exhaust ventilator
Regulations for smoke vent rooflights (AOVs) in Dorchester
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. Fragile-roof safety and access are planned before work starts.
Read the planning permission guide before you commit to a design.
What do smoke vent rooflights (AOVs) cost in Dorchester?
These are typical supply-and-fit ranges. For an address in Dorchester, 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 |
From enquiry to finished job
- Send the details. Postcode, rough size and a photo of the roof and room.
- Measure and check. A surveyor visits Dorchester, measures and checks structure and access.
- 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.
Neighbouring towns
Related work in Dorchester
Questions about smoke vent rooflights (AOVs) in Dorchester
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.
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.
Do you fit smoke vent rooflights (AOVs) in Dorchester?
Yes. We survey and fit smoke vent rooflights (AOVs) in Dorchester and across Dorset. Send your postcode and we will offer a survey date when we reply.
Can you work alongside my builder in Dorchester?
Yes. On new extensions we fit once the opening and upstand are ready and coordinate dates with your builder.
