How we approach dome rooflights in Sidcup
For Sidcup homes and buildings we offer dome rooflights: polycarbonate and acrylic domes for flat roofs, new or replacement. We measure first, specify to the opening and confirm any planning or building-control points before quoting.
Mansard and loft conversions are common across London, and roof windows are often set out alongside dormers on the rear slope. Think of dome rooflights for schools, flats and commercial flat roofs.
Sidcup is around 18 km from central London, and we survey and fit throughout that part of Greater London, including the DA14 district.
Choices for your Sidcup project
- Polycarbonate or acrylic
- Twin, triple or quad skin
- Insulated PVC or GRP upstands
- Fall-through protection mesh
- Clear, opal or tinted
- Suits schools, flats and commercial roofs
- Quick replacement on existing upstands
Before you order: points to check
- Plastic domes have a lower acoustic and thermal performance than glass
- Fire classification matters on some roofs
Building control and safety duties in Sidcup
For non-domestic buildings, planning depends on the building and its location; building regulations cover thermal performance and the fire classification of rooflights near boundaries. We confirm the route for your building before ordering.
For buildings other than dwellings, Approved Document L Volume 2 sets limiting U-values of 2.2 W/m²K for rooflights and 3.0 W/m²K for roof ventilators, including smoke vents. Fragile-roof safety and access are planned before work starts.
See our building regulations guide for U-values, glazing limits and self-certification.
Guide prices for Sidcup
Guide prices for dome rooflights in Sidcup 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 |
|---|---|---|
| Dome and new insulated upstand | £955 – £1,675 | £795 – £1,395 |
| Hinged or vented dome Typical | £715 – £1,195 | £595 – £995 |
| Replacement fixed dome | £475 – £835 | £395 – £695 |
How the job runs
- Tell us what you have. Send the DA14 postcode, a rough size and a couple of photos.
- 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.
- Fit and make good. We fit, seal, test and finish the reveal, then hand over the paperwork.
Dome rooflights near Sidcup
Other services in Sidcup
Dome rooflights in Sidcup: questions
Can domes open?
Hinged and vented domes are available, manual or electric.
Why has my dome gone yellow?
UV breaks down older plastics over time. Modern domes have UV-protective layers, but all plastics age.
Should I replace a dome or switch to glass?
A dome is cheaper and quick; glass gives a clear view and better performance. On a tight budget, or a commercial roof with many units, domes remain sensible.
Do I need to be at home for the survey in Sidcup?
Yes — someone needs to let us into the room below and, where possible, show us how the roof is reached.
Can you work alongside my builder in Sidcup?
Yes. On new extensions we fit once the opening and upstand are ready and coordinate dates with your builder.
