How we approach dome rooflights in New Malden
Our dome rooflights service in New Malden covers polycarbonate and acrylic domes for flat roofs, new or replacement. Every job starts with a survey of the opening, the roof covering and the room below, and a fixed written price.
Mansard and loft conversions are common across London, and roof windows are often set out alongside dormers on the rear slope. Dome rooflights suit schools, flats and commercial flat roofs.
Jobs in New Malden 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.
Specification options
- Fixed or hinged with vent
- Clear, opal or tinted
- Fall-through protection mesh
- Twin, triple or quad skin
- Polycarbonate or acrylic
- Quick replacement on existing upstands
- Light, impact-resistant domes
What to check first
- Old domes may be fragile — treat as fragile until checked
- Plastic domes have a lower acoustic and thermal performance than glass
Building control and safety duties in New Malden
On commercial roofs the main questions are usually building control, fire classification of rooflight materials and safe access rather than householder permitted development. Product data for building control is supplied with every quote.
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.
Dome rooflights prices in New Malden
The ranges below are typical for straightforward jobs; your fixed price follows a survey of your roof.
| 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
- Get in touch. Use the form, WhatsApp or the guide-price tool with your New Malden address.
- 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.
Dome rooflights near New Malden
Related work in New Malden
Dome rooflights in New Malden: questions
Can you replace just the dome?
Yes, if the upstand is sound and the size matches. Otherwise we replace both.
Are domes safe to walk on?
No. Treat any rooflight as fragile unless it is specifically certified non-fragile, and never stand on it.
Why has my dome gone yellow?
UV breaks down older plastics over time. Modern domes have UV-protective layers, but all plastics age.
Do I need to be at home for the survey in New Malden?
Yes — someone needs to let us into the room below and, where possible, show us how the roof is reached.
How do I book a survey in New Malden?
Send your postcode and, if you can, a photo of the roof and the room. We offer a survey date when we reply.
