Velux roof window installation, replacement and flashing repairs across Devizes. Supply and fit service — correct flashings as standard. Free no-obligation quotes.
Tell us the job in 30 seconds. No pushy sales, no call-out fee.
📞 Call Now: 01249 247 076In short: Velux and Roof Windows in Devizes: Velux work runs £150–£350 for a flashing repair, £1,200–£2,000 for a new window. We cover Devizes and the surrounding SN10 area with free quotes, no call-out fee, and a 10-year workmanship guarantee. Most leaking skylights need a flashing kit, not a replacement; new windows need the right planning and flashing.
All velux roof windows work across Devizes and surrounding Wiltshire.
Full installation including tile cutting, counter battening and proprietary flashing kit.
Get a quote →Failed or draughty windows replaced in existing opening. Flashing condition assessed.
Get a quote →Most Velux leaks are a flashing failure, not a window failure. Kit replacement without window removal where possible.
Get a quote →Upstand-mounted flat roof lights for extensions. Often combined with flat roof replacement.
Get a quote →Sun tunnels for bathrooms and hallways where a full roof window isn't practical.
Get a quote →Multiple roof window installations for loft conversions. Full coordination available.
Get a quote →Chalk downland setting produces greater temperature variation than the Avon Valley — more thermal cycling stress on leads and mortars than in sheltered towns. For velux roof windows work in Devizes, this means specification choices that reflect the actual conditions rather than generic Wiltshire averages.
Georgian market town centre with parapet buildings contrasts with Southbroom and Roundway's post-war estates. We are 14 miles southeast from Devizes — 25 minutes — with no travel surcharge and same local knowledge that applies to every property type in this area.
Free quotes. No call-out fees. 25 minutes from Chippenham.
Most leaking skylights need a flashing kit, not a replacement; new windows need the right planning and flashing in Devizes. Devizes has one of the finest Georgian market-town cores in the West Country — brick and stone townhouses, clay and slate roofs, and a large conservation area, ringed by post-war and modern estates. On this kind of stock, the common problems are parapet-gutter and leadwork failure on Georgian townhouses, slipped slates, and conservation-grade roof repairs — and knowing which you are dealing with is the difference between a lasting fix and money wasted.
Velux roof window installation and replacement in Devizes covers new loft conversion glazing, replacement of failed windows, and flashing repairs. Loft conversions on Devizes's Georgian market town and Southbroom estates properties are a regular driver of Velux installation demand. The most common call, however, is a leaking Velux where the window itself is fine but the flashing kit has failed — a significantly cheaper fix than full window replacement.
We handle the complete roofing element — tile cutting, counter battening, and the Velux proprietary flashing kit correctly installed. Correct flashing is what separates a long-term weatherproof result from a future leak. Rear-slope installations usually proceed without consent even in conservation areas. Front-slope work on listed buildings needs prior discussion. We work alongside builders and loft conversion contractors and can coordinate the roofing element within a larger project programme.
For a new window we check rafter spacing, the room below and planning status; for a leak we diagnose the flashing.
Rear-slope installations are usually permitted development; front-slope, listed and conservation-area need checking first.
A fixed price for install or flashing repair, agreed before work.
The window is fitted and sealed with the correct flashing kit for your specific tile or slate profile.
We test for watertightness, make good internally where agreed, and guarantee the work.
| Job | Typical duration |
|---|---|
| Flashing kit repair | 2–4 hours |
| Replacement in existing opening | half to full day |
| New roof window (rear slope) | 1 day |
| Multiple windows | 1–2 days |
| Dormer roofing / repair | per scope |
Cutting a new opening needs dry conditions so the roof is never left open to rain; we weather-schedule new installations.
Devizes' Georgian town-centre terraces have no side access and sit in a major conservation area; the surrounding estates have standard access. Pavement scaffold and skip permits in Devizes go through Wiltshire Council; on tight streets like the Market Place, St John's Street, Long Street we allow extra time for setup and access.
Velux work runs £150–£350 for a flashing repair, £1,200–£2,000 for a new window. Devizes pricing tracks Chippenham, adjusted for access on Devizes's stock.
| Job | Typical range | Notes |
|---|---|---|
| Flashing kit repair / renewal | £150–£350 | Fixes most leaks |
| Replacement in existing opening | £400–£700 | Like-for-like |
| New roof window (standard) | £1,200–£2,000 | Rear slope, fitted |
| Larger / multiple windows | £2,000–£3,000 | Per project |
| Dormer roofing / repair | per scope | Leadwork & weatherproofing |
| Conservation / listed | survey first | Consent may be needed |
No deposit on jobs under £500. On new installations, no payment before materials are on site. VAT included. Payment on completion once watertight.
Covering SN10 and surrounding postcodes.
Workmanship carries our 10-year guarantee; the window and flashing kit carry manufacturer warranties (Velux units typically 10 years) on top.
A day of work with some internal dust where the opening is cut; we sheet the room, protect floors, and clear up fully. You do not need to stay home for external work.
Flashing repairs run year-round; new installations need a dry window so the opening is never exposed to rain. Devizes sits high on the edge of Salisbury Plain, exposed to wind, with the Kennet and Avon canal adding local humidity.
"Two Velux windows fitted into loft conversion. Roofing done in a morning, completely watertight six months on."
"Velux leaking for two years — previous roofer said it needed replacing. These identified the flashing as the problem, replaced the kit, dry now. Saved a lot of money."
"Flat roof light on kitchen extension fitted at the same time as flat roof replacement. Kitchen transformed. Good combined value."
Single Velux: £400–£700. Replacement in existing opening: £200–£450. Flat roof light: £500–£900. Flashing repair: £150–£350. Free written quote — call 01249 247 076.
Rear-slope installations usually proceed without consent even in conservation areas. Front-slope work on listed buildings needs prior discussion.
Most leaking Velux windows don't need replacing. The flashing kit has usually failed while the window is sound. Flashing replacement costs £150–£350 versus £400–£700 for a new window. We diagnose correctly before quoting.
Devizes is 14 miles southeast from Chippenham — 25 minutes. No travel surcharge.
Yes — we work alongside builders across Devizes and Wiltshire. We handle the roofing element and can coordinate with the wider build programme.
Velux recommends a minimum glazed area of 10% of the floor area. For a typical loft bedroom of 12–15m², two standard pivot windows (78×98cm) usually meet this. We advise on sizing during the survey.
Internal condensation indicates insufficient ventilation. Solutions include trickle ventilators, upgraded mechanical ventilation, or a triple-glazed thermally-broken Velux. External condensation is normal and not a fault.
No call-out fees. No obligation. Local roofer covering all of Wiltshire.
01249 247 076Last updated: August 2026