Frameless structural rooflights in Belfast: what is involved?
For Belfast homes and buildings we offer frameless structural rooflights: minimal glass rooflights with no visible frame from inside. We measure first, specify to the opening and confirm any planning or building-control points before quoting.
Northern Ireland has a mix of terraces, bungalows and rural farmhouses, and rooflights are a common upgrade when extending. Typical uses for frameless structural rooflights include architect-led extensions and long slots of light over islands or along party walls.
Belfast is the main town we list in County Antrim; we also cover nearby Castlereagh and Newtownabbey.
What you can choose
- Solar-control coatings
- Shadow-gap or plastered reveal
- Heated glass on some ranges
- Butt-jointed runs for long openings
- Low-iron extra-clear glass
- Double or triple glazed structural units
- Nothing but glass visible from inside
Before you order: points to check
- Structural glass specification comes from the manufacturer
- The internal finish (plaster, shadow gap) is agreed before order
Planning, building control and Belfast
In Northern Ireland, roof alterations come under Class B of the 2015 order: a rooflight facing a road must not project more than 15 cm and must sit at least 0.5 m from the ridge, eaves, verge and party wall. A side-facing window within 15 m of a neighbouring boundary must be obscure-glazed, and non-opening unless the opening part is more than 1.7 m above the floor.
Technical Booklet F1 (2022) asks for replacement windows and rooflights in existing homes to reach WER Band C or a U-value of 1.6 W/m²K, assessed in the vertical position. Extensions follow a 25% glazing allowance in Technical Booklet F1.
See our building regulations guide for U-values, glazing limits and self-certification.
Frameless structural rooflights prices in Belfast
These are typical supply-and-fit ranges. For an address in Belfast, 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 |
|---|---|---|
| Long-format or jointed run | £6,595 – £11,995 | £5,495 – £9,995 |
| Large single pane Typical | £4,795 – £7,195 | £3,995 – £5,995 |
| Standard frameless unit | £3,595 – £4,795 | £2,995 – £3,995 |
What happens next
- Tell us what you have. Send the BT1 postcode, a rough size and a couple of photos.
- 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.
- Fit and make good. We fit, seal, test and finish the reveal, then hand over the paperwork.
Nearby towns
More we do in Belfast
Questions about frameless structural rooflights in Belfast
How is it lifted onto the roof?
Larger panes go up with a vacuum lifter, a hoist or a crane. We plan access at survey.
Is frameless glass as strong as a framed rooflight?
Yes — it is structural glass designed for the job. The support is hidden rather than missing.
Can it open?
Some frameless designs include a sliding or hinged opening element, but most are fixed. Pair with an opening unit if you need ventilation.
Do you fit frameless structural rooflights in Belfast?
Yes. We survey and fit frameless structural rooflights in Belfast and across County Antrim. Send your postcode and we will offer a survey date when we reply.
Will I need planning permission in Belfast?
Northern Ireland's householder permitted development allows rooflights within limits — no more than 15 cm projection on road-facing slopes and a 0.5 m margin from ridge, eaves and party walls.
