What the job costs in Larne
Vent swap
Like-for-like certified vent and actuator, connected to the existing controls and commissioned by a smoke-control specialist
Vent with new controls
Vent plus new control panel and detection, commissioned by a smoke-control specialist
Multiple vents
Several stairwells or larger systems, priced from a survey
Guide ranges for supply & fit; controls and commissioning by a smoke-control specialist. Your price is fixed in a written quote after we have seen photos or surveyed. Scaffold, access towers or a crane are priced separately if the job needs them, and building control fees, where a job needs them, are shown as their own line.
Is your address covered?
If you also own a property or a business unit in Carrickfergus, Newtownabbey or Bangor, that is no problem. We can survey and quote both, and where it suits, line the fitting days up together. Every address is reached by fitters travelling to it from their current jobs, and BT40, BT38 and BT39 sit comfortably within that pattern.
What the job includes
- Certified vent and actuator matched to the opening and controls
- Upstand checked, adapted or rebuilt to the vent maker's drawing
- Commissioning and sign-off carried out by the specialist before handover
- Certified as a system — We only fit smoke vents that are certified to BS EN 12101-2.
- Free area at the stair head — We check the free area the vent must provide before choosing a replacement.
How a fitting day runs
Fitting days start with a look at the sky. If rain is due, the order of work changes so the roof is never left open to it. A typical day for a smoke vent rooflight runs like this: set up access, protect the room, open up the roof or prepare the existing kerb or frame, check sizes, fix, seal, then finish inside. On jobs that take more than a day, the opening is weather-sealed overnight. The last hour goes on tidying, waste removal and a walk-round with you.
Planning and building rules in Northern Ireland
In Northern Ireland, smoke vents must be certified products that keep the free area the building's fire strategy requires, with controls connected and commissioned by a smoke-control specialist. The Technical Booklets and building control set the detailed requirement, and we confirm it before quoting.
Help us quote accurately
Each detail you send takes a question off our list. Photos inside and out show the opening and the ceiling. Rough measurements tell us the unit size. The roof covering tells us how it will be sealed in. Access notes tell us whether a tower or scaffold is needed. A product link, if you have one, lets us check it against the opening. Your postcode, BT40 or nearby, confirms travel.
Common questions in Larne
What if my roof opening is the wrong size for the smoke vent rooflight?
We find out before the fitting day, not on it. If the opening is slightly out, it can usually be adjusted by trimming or by packing out the upstand. If it is a long way off, the choice is between altering the opening and changing the unit. Bear in mind that rooflights are often sold by builder's opening size rather than external size, so check which one your measurement refers to.
Do you cover Larne?
Yes. Fitters travel to addresses in Larne and the surrounding districts, including BT40. We do not run an office there; the survey and the fitting happen at your property. A few island and remote postcodes are covered by arrangement; if yours is one, we confirm travel and dates before quoting.
Does a rooflight need building control approval?
In Northern Ireland a new opening alters the roof structure, so expect a building control application; confirm the position with your council, including for replacements. The new rooflight must meet WER Band C or 1.6 W/m²K. We confirm what applies before you commit.
Send a few photos and your BT40 postcode, and we will put together a written quote for the job.

