How we approach roof lanterns in Dumbarton
Our roof lanterns service in Dumbarton covers hipped glass lanterns that lift the ceiling of orangeries and extensions. Every job starts with a survey of the opening, the roof covering and the room below, and a fixed written price.
Stone villas, cottages and conservation areas across Scotland often call for conservation rooflights in slate roofs. In Dumbarton, as anywhere, roof lanterns are the usual choice for rooms that need height as well as light.
Jobs in Dumbarton are planned around access: whether the roof can be reached from the garden, whether a hoist or crane is needed, and where we can park. We check this when we measure.
Choices for your Dumbarton project
- Internal and external colours
- Rectangular, square or bespoke sizes
- LED lighting in the plaster box
- Opening vents with electric control
- Solar-control or self-cleaning glass
- Can include opening vents
- Classic look that suits period and modern homes
What to check first
- Plaster-box depth affects how the lantern looks from below
- Some designs project above the roof enough to affect planning on certain houses
Consents for roof lanterns in Dumbarton
Planning rules in Scotland differ: rooflights are treated as external alterations under Class 2B, with no permitted development in conservation areas. Listed buildings need listed building consent where the work affects their character.
Scotland's Technical Handbook (section 6) asks for windows, doors and rooflights in an extension to average 1.4–1.6 W/m²K, with no single unit worse than 3.3 W/m²K. Replacing a rooflight, frame included, does not need a building warrant, but the work must still meet the building standards.
Read the planning permission guide before you commit to a design.
Guide prices for Dumbarton
Prices below are shown including and excluding VAT. In Dumbarton, as elsewhere, making good inside and access equipment are the main variables.
| Option | Guide price inc VAT | Ex VAT |
|---|---|---|
| Large or bespoke aluminium lantern | £5,995 – £10,795 | £4,995 – £8,995 |
| Mid-size aluminium lantern (2 × 3 m) Typical | £3,955 – £5,995 | £3,295 – £4,995 |
| Small lantern (1 × 2 m) | £2,995 – £3,955 | £2,495 – £3,295 |
The process, step by step
- Tell us what you have. Send the G82 postcode, a rough size and a couple of photos.
- Survey. We measure the opening, check the roof build-up and agree the options.
- Fixed quote. Product, work and price in writing — nothing is ordered until you agree.
- Fitting and handover. We install, clean down and leave product and warranty documents.
Neighbouring towns
Related work in Dumbarton
Common questions
Can a lantern go on an existing extension?
Yes, if the flat roof structure can be opened up and trimmed. We check joists and the roof build-up at survey.
Do roof lanterns get hot?
They can in summer if clear glass is used on a south-facing roof. Solar-control glass and an opening vent make a big difference.
Do they leak?
Modern lanterns are sealed systems. Leaks usually trace back to the kerb or roof membrane detail, which we form and check ourselves.
Do you fit roof lanterns in Dumbarton?
Yes. We survey and fit roof lanterns in Dumbarton and across Glasgow and Dunbartonshire. Send your postcode and we will offer a survey date when we reply.
Can you work alongside my builder in Dumbarton?
Yes. On new extensions we fit once the opening and upstand are ready and coordinate dates with your builder.
