Velux and roof window installation across Chippenham — new skylights, replacements, dormer windows and flashing repairs. Correctly flashed for your tile profile, watertight first time.
In short: Velux and skylight installation in Chippenham costs £1,200–£3,000 fitted depending on window size, tile type and access. Most leaking roof windows need only a new flashing kit (£150–£350), not a full replacement. We install, replace and repair roof windows and dormers, correctly flashed for your roof.
A roof window brings daylight into a loft or top-floor room, and the watertightness depends entirely on the flashing kit that seals it to the surrounding tiles or slates. Get the flashing right for the roof covering and it stays dry for decades; get it wrong and it leaks from day one. Most 'faulty' roof windows we're called to don't need replacing at all — the flashing kit has failed or was wrong for the tile profile, and a £150–£350 flashing renewal fixes it. New installations, replacements in existing openings, and dormer windows are all priced by size and access.
For a new window we check the rafter spacing, 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.
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 installation.
Loft conversions and roof windows are popular across Chippenham as families add space rather than move, and the right approach varies by property. On the concrete interlocking tiles of the Hardenhuish, Stanley and Cocklebury estates, standard Velux flashing kits fit well and a rear-slope installation is usually straightforward permitted development. On the plain clay tiles and occasional slate of the Victorian and Edwardian stock in Monkton Park and along London Road, the flashing must be matched carefully to the smaller tile format, and conservation-area rules may restrict front-slope installations.
The most common call, though, is a leaking existing roof window — and the good news is that most don't need replacing. The flashing kit has usually failed or was the wrong type for the tile profile when first fitted. We diagnose properly before quoting: a flashing renewal at £150–£350 solves the great majority of leaks, versus £400–£700 for a full window replacement. We'll never quote a new window when a flashing repair will do.
Dormer windows — which project from the roof slope to add headroom — are a bigger job than a flush roof window, involving structural work and careful weatherproofing where the dormer meets the main roof. We handle the roofing element of dormer conversions and coordinate with loft-conversion builders across Chippenham, dressing the lead and flashing so the junctions stay watertight. Dormer repairs, where an existing dormer leaks at the roof junction, are a common call on Chippenham's older converted lofts.
Planning status is the detail to get right. Rear-slope roof windows and modest dormers on standard Chippenham houses are usually permitted development, but front-slope installations, listed buildings, and anything within the town-centre conservation area or in Lacock, Corsham and Box may need prior approval or listed building consent. We confirm the planning position during the survey so there are no surprises — the last thing you want is a skylight you have to remove.
| Roof window installed (standard) | £1,200 – £2,000 |
| Larger / multiple windows | £2,000 – £3,000 |
| Replacement in existing opening | £400 – £700 |
| Flashing kit repair / renewal | £150 – £350 |
| Dormer roofing / repair | per scope |
| Conservation-area / listed | survey first |
Indicative Chippenham prices for guidance. Every quote is free, itemised and fixed before work starts — no call-out fee.
“A roof window is only as watertight as its flashing; the flashing kit must be matched to the roof covering profile to maintain the weather seal across the full range of tile or slate formats.” — FMRC / manufacturer installation standards
Speak to a local Chippenham roofer today. Honest advice, itemised quotes, 10-year guarantee.
📞 Call 01249 247 076“Velux in our Hardenhuish loft conversion — rear slope, straightforward, watertight first winter. They confirmed we didn't need planning before starting. Easy.”
“Our old skylight in Monkton Park was leaking for months. Turned out it just needed a new flashing kit, not a whole new window like another firm quoted. Saved a fortune.”
“Dormer on our Victorian place was leaking at the roof junction. They stripped it back, re-leaded it properly and it's dry. Knew what they were doing with the lead.”
A standard roof window installed costs £1,200–£2,000, larger or multiple windows £2,000–£3,000, and a replacement in an existing opening £400–£700. A flashing repair on a leaking window is just £150–£350.
Usually not. Most leaking roof windows in Chippenham just need a new flashing kit (£150–£350) — the original has failed or was wrong for the tile profile. We diagnose properly and won't quote a full replacement (£400–£700) when a flashing repair will fix it.
Rear-slope roof windows on standard houses are usually permitted development. Front-slope installations, listed buildings, and properties in the town-centre conservation area or in Lacock, Corsham and Box may need approval. We confirm the planning position during the survey.
Yes — but the flashing must be matched carefully to the smaller clay tile format, and conservation rules may restrict front-slope installations. We use the correct flashing kit for your specific covering so it stays watertight.
Yes — we handle the roofing and weatherproofing element of dormer installations and repairs, coordinating with loft-conversion builders. Dormer leaks at the roof junction, common on Chippenham's older converted lofts, are a frequent repair for us.
Almost always the flashing kit — either it's failed with age or was the wrong type for the tile profile when fitted. The window itself rarely fails. Correct flashing matched to your covering is what keeps a roof window dry for decades.
A single rear-slope window in an existing loft typically takes a day. New openings, multiple windows and dormers take longer. We test for watertightness and make good internally where agreed before finishing.
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Free quotes, no call-out fee, 10-year guarantee. Serving Chippenham, Corsham, Calne, Melksham and all of Wiltshire.
📞 01249 247 076