Flat rooflights
A flat rooflight is a single double or triple glazed unit sitting almost flat on an upstand, usually with a slight fall so rainwater runs off. From inside it gives a clean, frameless-looking square or rectangle of sky. From outside it is barely visible.
Get a price for a flat rooflight
Send your kerb size and we will reply with a fixed written quote.
In short: A single near-flat pane on an upstand: minimal, low and discreet. Guide prices start from £595 including VAT, supply only.
Flat rooflight or roof lantern?
Choose a flat rooflight where you want the lowest profile, a minimal look or a cheaper option for a small opening. Choose a lantern where you want more light, better water and dirt shedding and a focal point. Our comparison guide goes into detail.
Do flat rooflights collect water?
They are designed with a fall, either built into the upstand or into the unit itself, so water runs off. Dirt can still collect at the lower edge, so a quick rinse now and then keeps them clear.
What does a flat rooflight cost?
Flat rooflights cost less than lanterns of the same footprint. Typical guide prices start from about £595 including VAT for small sizes; your quote confirms the exact price.
Flat rooflight prices by size
| Kerb size | Roof area | Guide price | Configure |
|---|---|---|---|
| 1000 × 1000 mm | 1.00 m² | £595–£695£496 ex VAT from | Configure |
| 1200 × 1200 mm | 1.44 m² | £695–£845£579 ex VAT from | Configure |
| 1000 × 1500 mm | 1.50 m² | £695–£845£579 ex VAT from | Configure |
| 1000 × 2000 mm | 2.00 m² | £845–£995£704 ex VAT from | Configure |
| 1500 × 1500 mm | 2.25 m² | £895–£1,095£746 ex VAT from | Configure |
Guide prices include VAT at 20%, supply only, aluminium with self-cleaning double glazing in a stock colour. Your fixed price is confirmed in writing on your quote before you order.
What you get
- Type
- Single fixed glazed unit
- Fall
- Built-in or upstand fall for drainage
- Glazing
- Double or triple, toughened or laminated
- Profile
- Very low
- Walk-on
- Walk-on units are a separate product; ask us
Three checks
- Measure the outside of the kerb, width then length, and check the diagonals. How to measure.
- Check the glazing allowance for your extension and whether you need planning permission. See building regulations and planning.
- Plan the lift. Your quote gives the approximate weight so your installer can plan access and lifting.
Flat rooflights: common questions
Can I walk on a flat rooflight?
Only if it is a walk-on rooflight designed for foot traffic. Standard rooflights are not designed to be walked on.
Are flat rooflights cheaper than lanterns?
Usually, size for size. They use one glass unit and a simple frame.
Do flat rooflights leak?
They should not, provided they are installed on a properly flashed upstand with the right fall and the seals are maintained.
Can a flat rooflight open?
Some ranges offer electric opening versions. Ask for availability for your size.
Flat rooflights by area
We deliver flat rooflights across mainland Britain. Choose your area for local delivery and regulation notes.
England
- Bedfordshire
- Berkshire
- Bristol
- Buckinghamshire
- Cambridgeshire
- Cheshire
- Cornwall
- Cumbria
- Derbyshire
- Devon
- Dorset
- County Durham
- East Riding of Yorkshire
- East Sussex
- Essex
- Gloucestershire
- Greater London
- Greater Manchester
- Hampshire
- Herefordshire
- Hertfordshire
- Isle of Wight
- Kent
- Lancashire
- Leicestershire
- Lincolnshire
- Merseyside
- Norfolk
- North Yorkshire
- Northamptonshire
- Northumberland
- Nottinghamshire
- Oxfordshire
- Rutland
- Shropshire
- Somerset
- South Yorkshire
- Staffordshire
- Suffolk
- Surrey
- Tyne and Wear
- Warwickshire
- West Midlands
- West Sussex
- West Yorkshire
- Wiltshire
- Worcestershire
Wales
Scotland
- Aberdeen and Aberdeenshire
- Dundee and Angus
- Argyll and Bute
- Ayrshire
- Dumfries and Galloway
- Edinburgh and the Lothians
- Fife
- Forth Valley
- Greater Glasgow
- Highlands and Islands
- Lanarkshire
- Moray
- Perth and Kinross
- Scottish Borders