Roof windows transform dark loft spaces into bright, ventilated rooms. We supply and install the full range of Velux roof windows, sun tunnels and skylights — from straightforward replacements to new installations in existing roofs. Every installation uses the manufacturer-approved flashing kit for your specific roof covering.
Roof windows transform dark loft spaces into bright, ventilated rooms. We supply and install the full range of Velux roof windows, sun tunnels and skylights — from straightforward replacements to new installations in existing roofs. Every installation uses the manufacturer-approved flashing kit for your specific roof covering.
The correct roof window depends on roof pitch, tile type, and what you need the window to do. Centre-pivot windows suit standard pitches. Top-hung windows give more headroom. Conservation-style flush-fit windows are required in some West London conservation areas.
The roof window itself rarely leaks — it is the flashing around it that fails. We use only Velux-approved flashing kits matched to your specific tile profile. Generic flashings and site-made solutions are the primary cause of roof window leaks in West London.
If you are converting your loft, Building Regulations require minimum window areas for natural light and ventilation, plus at least one opening window for fire escape. We work with your builder to position and size windows correctly for compliance.
Velux & Roof Windows across West London: £800–£3,000 depending on scope, access and materials. We provide free, written, no-obligation quotes for all work. Call 0203 302 2547 for a quote.
Free quotes, no call-out fees, same-day emergency service.
📞 Call Now: 0203 302 2547"Flat roof conversion from felt to grp fibreglass — called on a weekday and they were out within days. Professional, tidy, and the price was exactly as quoted. Highly recommend."
"Gutter guard installation to stop the constant leaf blockage — called on a weekday and they were out within days. Professional, tidy, and the price was exactly as quoted. Highly recommend."
"Complete gutter and fascia replacement — called on a weekday and they were out within days. Professional, tidy, and the price was exactly as quoted. Highly recommend."
A standard centre-pivot Velux window supplied and installed in West London costs £800–£1,500 depending on size. Larger or specialist windows including balcony-style and conservation models run £1,500–£3,000. Replacement of an existing unit is typically £600–£1,000.
Yes — we cut into the existing roof, install the window with correct structural support, and weatherproof with the appropriate flashing kit. Planning permission is not usually required unless you are in a conservation area.
The three most common causes are: incorrect or deteriorated flashing, condensation mistaken for a leak, and failed window seals. We diagnose the actual cause before quoting — it is often a straightforward flashing repair rather than a window replacement.
Minimal — clean the glass, oil the hinges annually, and check the flashing seals every 2-3 years. Velux windows typically last 20-30 years before the seals and mechanisms need attention.
Yes — old skylights are often single-glazed, poorly sealed and difficult to open. A modern Velux replacement gives you double glazing, proper ventilation, and a reliable weatherproof seal.
Yes — sun tunnels bring natural light to internal rooms that cannot have a conventional window. They are ideal for bathrooms, hallways and stairwells in West London properties.
Window size depends on room floor area — Building Regulations specify minimum glazing areas for habitable rooms. We calculate the correct size based on your room dimensions and roof pitch.
Every job follows our standard quality process: free inspection and assessment, written quote with full scope of work, professional installation by our own team using specified materials, post-completion inspection with photographic record, and a written guarantee. This process applies to every job regardless of size — a £200 repair gets the same professional approach as a £15,000 re-roof.
We specify materials based on the specific conditions of your property — its age, construction type, exposure and the performance requirements of the job. We never use the cheapest available option as default — we use the right option for your situation and explain why. All materials are sourced from established manufacturers with proven track records.
All work carries our written workmanship guarantee. The guarantee period depends on the scope of work — from 2 years on minor repairs to 10 years on full installations. Guarantees are transferable if you sell the property. Materials carry the manufacturer's own guarantee in addition to our workmanship cover.
Roof window problems usually show up as drips, condensation or daylight gaps around the frame.
When it is not the answer: If condensation appears inside the glass (not between panes), the cause is usually room humidity. Improve ventilation first.
We check whether the issue is the window, the flashing, or condensation.
Correct size, type and flashing kit matched to your tile profile.
New window fitted with manufacturer-approved flashing kit.
Surrounding tiles refitted. Internal reveal finished.
Water-tested for seal integrity. Operation checked.
| Job | Typical duration |
|---|---|
| Like-for-like replacement | Half day |
| New installation | 1 day |
| Flashing-only replacement | 2-4 hours |
| Loft conversion (multiple) | 1-2 days |
Needs a dry day. The opening is exposed for 2-4 hours during the swap.
Internal access via loft plus external access to surrounding tiles. Scaffold is specified for: windows on front elevations above first floor, dormer windows, conservation-flush windows - always itemised in your written quote, never a hidden extra, and we arrange it.
Victorian terraces across Fulham, Kilburn and Willesden mean rear-access scaffold and pavement permits on busy residential streets. Pavement scaffold and skip permits go through the relevant borough council; allow a few working days on streets like Fulham Palace Road, Kilburn High Road, King Street Hammersmith, Askew Road where space is tight.
| Job | Typical range | Notes |
|---|---|---|
| Centre-pivot Velux | £1,200-£2,200 | Includes flashing kit |
| Top-hung | £1,400-£2,800 | More headroom |
| Conservation flush-fit | £1,800-£3,200 | Conservation areas |
| Like-for-like replacement | £800-£1,400 | Existing opening |
| Sun tunnel | £500-£900 | Internal rooms |
| Flashing-only | £250-£500 | Unit sound, flashing failed |
Worked example: CK02 centre-pivot replacement in Ealing loft conversion: unit £520, flashing £110, labour £380, finish £90 — total £1,100.
No deposit. Payment on completion. VAT included.
Covering W3-W14, SW6, SW13-14, NW2-10, TW1-13, UB1-10, HA0-9 and surrounding postcodes.
Velux: 10 years on unit + 10 years on flashing when installed by approved fitter (which we are). Our 10-year workmanship on top.
If a fault appears in covered work, we come back and put it right. No quibbling, no re-charge.
Internal loft access needed. Some dust from tile cutting. One day typical. You do not need to stay home for external work - we just need power and access agreed in advance.
Needs a dry day for the swap. Once installed, weathertight within hours. Thames corridor humidity slows drying on riverside properties; Harrow Hill faces 15-20% higher wind loading than lowland areas.
No call-out fees. No obligation. Just an honest quote from a local West London roofer who turns up when they say they will.
0203 302 2547 📞 Call Now: 0203 302 2547