How we approach frameless structural rooflights in Castlereagh
Frameless structural rooflights in Castlereagh means minimal glass rooflights with no visible frame from inside. We cover the BT5 district and the rest of County Down, with a survey before any price is fixed.
Wind and rain off the Atlantic make upstand and flashing details important on Northern Irish roofs. Typical uses for frameless structural rooflights include architect-led extensions and long slots of light over islands or along party walls.
Castlereagh sits about 4 km from Belfast and 10 km from Newtownabbey, and we cover the whole BT5 postcode district and the roads in between.
What you can choose
- Shadow-gap or plastered reveal
- Low-iron extra-clear glass
- Butt-jointed runs for long openings
- Triple glazing
- Solar-control coatings
- Can run along party walls and side returns
- Nothing but glass visible from inside
Before you order: points to check
- Tolerances are tight — the opening must be built square and to size
- Large panes need lifting gear and access planning
Do you need permission in Castlereagh?
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. Listed buildings also need listed building consent from the council.
For homes in Northern Ireland, Technical Booklet F1 sets 1.6 W/m²K (or WER Band C) for replacement glazing including rooflights. Extensions follow a 25% glazing allowance in Technical Booklet F1.
See our building regulations guide for U-values, glazing limits and self-certification.
Guide prices for Castlereagh
Guide prices for frameless structural rooflights in Castlereagh are the same as anywhere we work — what changes the price is the job: access, structure, scaffold and finishing.
| 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
- Send the details. Postcode, rough size and a photo of the roof and room.
- Survey. We measure the opening, check the roof build-up and agree the options.
- Agree the quote. You approve the specification and price before anything is ordered.
- Fitting and handover. We install, clean down and leave product and warranty documents.
Neighbouring towns
Related work in Castlereagh
Common questions
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.
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.
Can a frameless rooflight be walked on?
Only if it is specified as a walk-on unit. Most frameless rooflights are for light only.
Can you work alongside my builder in Castlereagh?
Yes. On new extensions we fit once the opening and upstand are ready and coordinate dates with your builder.
Will I need planning permission in Castlereagh?
Most rooflights on houses in Northern Ireland are permitted development under Class B, but not in a conservation area or on a listed building's curtilage.
