How we approach frameless structural rooflights in Derry/Londonderry
We handle frameless structural rooflights across County Londonderry, including Derry/Londonderry. In short: minimal glass rooflights with no visible frame from inside. The survey checks structure, weathering and orientation, so the quote reflects your actual roof.
Many Northern Irish homes have later flat-roofed kitchen extensions where an old dome can be swapped for glass. Think of frameless structural rooflights for rooms where you want sky without a visible frame.
We cover all of Derry/Londonderry and the BT48 district, and nearby Strabane and Limavady.
Options we can specify in Derry/Londonderry
- Butt-jointed runs for long openings
- Shadow-gap or plastered reveal
- Triple glazing
- Low-iron extra-clear glass
- Solar-control coatings
- Long, slim or very large formats
- Nothing but glass visible from inside
What to check first
- Tolerances are tight — the opening must be built square and to size
- Structural glass specification comes from the manufacturer
Planning and building rules for Derry/Londonderry
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. Listed buildings also need listed building consent from the council.
Northern Ireland's energy rules assess rooflight U-values in the vertical position — unlike England and Wales — and expect 1.6 W/m²K or Band C for replacements. Extensions follow a 25% glazing allowance in Technical Booklet F1.
Read the planning permission guide before you commit to a design.
What do frameless structural rooflights cost in Derry/Londonderry?
These are typical supply-and-fit ranges. For an address in Derry/Londonderry, 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 |
From enquiry to finished job
- Tell us what you have. Send the BT48 postcode, a rough size and a couple of photos.
- Free site visit. For new installs we survey free, measure and confirm the roof detail.
- Written price. You receive a fixed price listing the unit, the work and the lead time.
- Fit and make good. We fit, seal, test and finish the reveal, then hand over the paperwork.
Frameless structural rooflights near Derry/Londonderry
More we do in Derry/Londonderry
Common questions
Does it cost more?
Usually, because the glass is larger and heavier and the finish needs tighter tolerances. The price table shows typical ranges.
Will I see the edge of the glass?
From inside, the reveal is finished up to the glass so the edge is hidden. From outside you will see the glass and its edge seal.
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.
How do I book a survey in Derry/Londonderry?
Send your postcode and, if you can, a photo of the roof and the room. We offer a survey date when we reply.
Will I need planning permission in Derry/Londonderry?
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.
