Guide prices
Small fixed
Double-glazed fixed unit up to 1000 × 1000 mm, fitted to a ready upstand
Medium fixed
1000 × 1500 to 1000 × 2000 mm, double or triple glazed
Large fixed
Bigger units, solar-control glass, two-person lift or lifting gear
Guide ranges for supply & fit. 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.
Areas around Derry/Londonderry we cover
Looking at a property near Derry/Londonderry but not quite in it? We work across BT48, BT47 and BT49 and outwards to Coleraine, Omagh and Dungannon. Give us the full postcode when you get in touch, because access, parking and the route for a large unit all depend on the exact street. Those details shape the quote for any job around Derry/Londonderry.
Your flat rooflights or ours
Supply and fit tends to suit people who would rather not pick a unit from a catalogue. We look at the roof, the opening and how you use the room, then put a flat rooflight on the quote that fits all three. Fit-only suits people who already know what they want, or have one on site. We are happy with either. The difference is who stands behind what: on fit-only, the maker or retailer covers the product, and our workmanship guarantee covers the installation.
What the job includes
- Fall confirmed so rain runs off the glass rather than sitting on it
- Product paperwork handed over and warranty registration explained
- Lifting gear or extra hands arranged for large and heavy panes
- Ceiling and reveal depth — We measure the depth from the kerb top to the ceiling to plan the reveal.
- Solar gain on south-facing roofs — We ask which way the roof faces and how the room is used before suggesting glass.
Fitting your flat rooflight, step by step
Protection comes before tools. Floors, furniture and stairs get covered, and the ceiling below the opening is sheeted to catch dust. Up top, the fitters confirm the opening is square and the upstand or flashing suits what the maker specifies. Fixing follows, then weather-sealing into the membrane, felt or tiles. Only once the roof is tight do they turn to the internal reveal. Time on site for a flat rooflight: one day, weather permitting.
Planning, building control and Derry/Londonderry
Northern Ireland's building regulations set a minimum of WER Band C or 1.6 W/m²K for rooflights and roof windows in existing homes, assessed under Technical Booklet F1. New openings involve trimming the roof structure, so expect a building control application. Many house rooflights don't need planning permission, but conservation areas and listed buildings are excluded, and side windows near a boundary have obscure-glazing rules. We confirm what applies.
Details that speed up your quote
Keep it simple. Two or three photos, outside and inside. Approximate sizes. What the roof is made of. Anything awkward about getting up there, such as a conservatory below, a narrow side path or no parking. If you bought the rooflight online, the link or model name. Then your postcode in or around BT48. That is enough for a first price.
Common questions in Derry/Londonderry
What upstand height and roof pitch does flat rooflight fitting need?
It depends on the product. Manufacturers usually specify a minimum upstand height above the finished roof surface, and a minimum pitch on the glass so rain runs off. We follow the maker's figures for your unit rather than a rule of thumb. If your existing kerb or roof falls short, we explain the options, such as raising the upstand or choosing a unit with built-in pitch.
Can you remove and dispose of the old rooflight?
Yes. Taking out the old unit is part of any replacement job, and it leaves with the rest of the waste unless you ask to keep it. Old domes, glass and frames go through proper waste routes. If removal turns up a rotten kerb or damaged decking, we show you what we have found and agree the repair with you before going any further.
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.
Tell us your postcode, BT48 or close by, and what you want fitted. We will reply with the next steps and a quote.
