Flat Roof Skylights
Fixed and opening skylights for flat roofs and extensions — bringing daylight where you need it most.
- Fixed, manual and electric opening options
- Full waterproofing integration
- Fixed pricing with no hidden extras
Flat Roof Extensions Need Not Be Dark
Single-storey extensions, kitchens and living spaces beneath flat roofs can feel dark and enclosed, especially in the centre of the room away from windows. A flat roof skylight solves this problem completely, bringing natural daylight directly into the heart of the space. Modern flat roof skylights are sleek, thermally efficient and available in sizes large enough to transform an entire room.
Radiant Roofing supplies and installs flat roof skylights across Kent, Sussex and Surrey. We fit both kerb-mounted and deck-mounted units from leading manufacturers, fully integrated with your flat roof membrane — whether EPDM, GRP or single-ply. Every installation is weathertight, insulated and finished to the highest standard.
How It Works
Site Assessment
We inspect your flat roof, check the structure and recommend the best skylight size, type and position for maximum light and minimum heat loss.
Fixed Quote
You receive a detailed quote covering skylight supply, structural opening, waterproofing integration and internal finishing — no hidden extras.
Expert Installation
We cut the opening, reinforce the structure, fit the skylight and fully integrate it with the surrounding flat roof membrane for a watertight seal.
Guarantee
Your flat roof skylight is backed by our workmanship guarantee plus manufacturer warranties on the unit and glazing.
Site Assessment
We inspect your flat roof, check the structure and recommend the best skylight size, type and position for maximum light and minimum heat loss.
Fixed Quote
You receive a detailed quote covering skylight supply, structural opening, waterproofing integration and internal finishing — no hidden extras.
Expert Installation
We cut the opening, reinforce the structure, fit the skylight and fully integrate it with the surrounding flat roof membrane for a watertight seal.
Guarantee
Your flat roof skylight is backed by our workmanship guarantee plus manufacturer warranties on the unit and glazing.
What Our Flat Roof Skylight Service Includes
We install flat roof skylights on all types of flat roof covering. Every installation is fully weatherproofed and meets current Building Regulations for thermal performance.
What Does a Flat Roof Skylight Cost?
Typical price range
£1000 – £4000
VAT may apply depending on the project
Factors that affect the price:
- 1Skylight size (from 600x600mm to over 1200x1200mm)
- 2Type (fixed, manual opening, electric opening)
- 3Flat roof covering type and integration method
- 4Structural work and internal finishing requirements
A standard fixed flat roof skylight with installation costs £1,000 to £2,000. Large opening skylights or installations requiring significant structural work run £2,000 to £4,000. We provide a fixed quote after assessing your roof.
What Our Customers Say
Verified Google ReviewsJane S.
Kent
They were very friendly, professional and polite and left the site immaculate at the end of the day. I would thoroughly recommend them to others. The work was carried out to a very high standard.
Peter B.
East Sussex
Excellent work, highly recommended! Very knowledgeable, by far the best roofing company we have ever used and super nice guys.
Sarah M.
Surrey
Radiant Roofing completed our roof repair quickly and professionally. Great communication throughout and a fantastic result.
Frequently Asked Questions
A flat roof skylight installation typically costs between £1,000 and £4,000. A standard fixed unit is £1,000 to £2,000 including supply and installation. Larger or opening skylights with electrical operation sit at the higher end. We include full waterproofing integration and basic internal finishing in all quotes.
Yes. We retrofit skylights to existing flat roofs by cutting the opening, reinforcing the structure and integrating the skylight with the existing membrane. The flat roof covering is dressed up to the kerb and sealed to maintain a fully watertight finish.
Not when installed correctly. We use manufacturer-approved kerb systems and fully integrate the skylight with the flat roof membrane. The upstand height, membrane dressing and sealant detailing are all critical — and our experienced team gets these right every time.
We cover Kent, East Sussex, West Sussex and Surrey. Our teams regularly install flat roof skylights in Tunbridge Wells, Crowborough, Sevenoaks, Tonbridge, Uckfield, Haywards Heath, East Grinstead and surrounding areas.
Yes. All installations are backed by our workmanship guarantee. The skylight units also carry manufacturer warranties on the frame, glazing and operating mechanism.
Contact Us!
Get in touch with us!
Looking for a free quote? Just fill in the form below, and we'll take care of the rest!
Contact Information:
Mobile (24/7): 07753 165 005
Landline (Office Hours): 01892 356 967
Email: contact@radiantroofing.co.uk
Head Office:
Address:
Alpha House
Crowborough Hill
Crowborough
TN6 2EG
Opening Hours:
Monday to Friday: 7:30 am – 6:00 pm
Saturday: 7:30 am – 12:00 pm
Sunday: Closed (mobile still available)
Our Mobile and Email is available 24/7
