Velux and roof window installation in Chester — correctly flashed into the existing roof covering, whatever the material. We install new windows and repair failed flashings on existing units across Chester and Cheshire.
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📞 Call Now: 0124 463 7110Velux installation in Chester costs £600 to £900 for a standard GGL window including flashings and making good. We hand-cut Welsh slate to fit and advise on planning at survey. NFRC-registered, 10-year guarantee. Call 0124 463 7110. Free surveys and written quotes across all Chester postcodes with no obligation.
Roof window installation is a roofing job as much as a carpentry one — the junction between the window frame and the surrounding roof material is where failures happen.
New roof window supply and installation in Chester homes. Correctly integrated with the surrounding Welsh slate, clay tile or concrete tile — not just dropped in with a rubber collar.
Failed flashing around existing roof windows is the primary source of persistent loft and bedroom leaks on Chester properties where Velux were fitted by non-specialists.
Old or failed Velux and roof window replacement. We remove the old unit, check the surrounding roof for damage, and install the new unit with correct integrated flashing.
Flush conservation-style roof lights for Chester's Victorian and Edwardian properties in conservation areas — maintaining the roof profile without a projecting frame.
Standard 78x98cm Velux supply and installation with integrated flashing kit.
114x118cm or larger unit with full flashing integration into Chester roof covering.
Repair or replacement of failed flashing kit around existing roof window.
Flush conservation unit with lead-dressed frame for Chester historic properties.
Roof windows bring light into a loft or top-floor room — here is when a Velux is the right move for a Chester property and when to wait.
When it is not the answer: If the roof is due for replacement soon, it is worth fitting the window as part of the re-roof rather than twice — we will advise on timing. Read the full guide.
We assess the roof structure and pitch and recommend the right size and glazing.
A fixed price covering the window, flashing kit and making-good.
Tiles or slates removed and rafters trimmed and reinforced correctly.
The window installed with its flashing kit and integrated into the covering, fully weathertight.
Reveals made good where included, debris cleared, and the guarantee handed over.
| Job | Typical duration |
|---|---|
| Like-for-like replacement | Half a day–1 day |
| New opening formed | 1–2 days |
| Multiple windows | 2–3 days |
| With internal plastering | Add 1–2 days |
We open the roof only when the forecast allows a dry window and weatherproof the same day.
Roof-window work is done from scaffold or a tower for safe access and glazing handling. Scaffold is specified for: most roof-window installs - always itemised in your written quote, never a hidden extra, and we arrange it.
Chester’s Victorian and Edwardian terraces in Hoole, Boughton and Newton often have narrow frontages and limited rear access, so scaffold has to be planned carefully and sometimes needs permit-controlled pavement space; detached properties in Upton and Vicars Cross with open drives are simpler. Pavement scaffold and skip permits go through Cheshire West and Chester Council; allow a few working days on streets like the terraced streets off Hoole Road, Faulkner Street in Hoole, the lanes around Boughton where space is tight.
| Job | Typical range | Notes |
|---|---|---|
| Like-for-like Velux | £650–£1,200 | Incl. window |
| New roof window opening | £1,200–£2,200 | Structural work |
| Multiple windows | £2,500–£5,000+ | Per project |
| With internal finishing | +£400–£900 | Plaster/reveals |
| Velux unit (supply) | £300–£700 | Model dependent |
Worked example: A new Velux formed in a Chester loft conversion, with flashing kit and reveals made good: around £1,400–£1,900.
Staged payment; nothing before the window and materials are on site. VAT invoiced.
Installation workmanship is covered for 10 years; Velux units carry their own manufacturer glazing and product warranties.
If a fault appears in covered work, we come back and put it right. No quibbling, no re-charge.
A day or two of work with some internal dust where an opening is formed — we sheet the room and clear up thoroughly. You do not need to stay home for external work - we just need power and access agreed in advance.
We time the roof opening around dry weather and never leave it exposed overnight to Chester’s rain. Chester’s wet, cool north-west climate — around 750mm of rain a year and exposed to gales off the Irish Sea — means we build weather margin into every booking and weatherproof open work the same day.
The most common reason a Chester Velux installation leaks is that the flashing was fitted incorrectly when the window was installed. A roof window is not self-sealing — the junction between the window frame and the surrounding tiles or slates requires an integrated flashing kit designed for that specific tile profile, correctly lapped and stepped. A standard rubber collar pushed around the window frame does not achieve this and will leak within two to five years.
Chester's diverse roof stock means the flashing requirements are different for every installation: Welsh slate in Hoole needs a slate-profile flashing kit with individually cut soakers; 1930s plain clay tiles in Newton need a plain tile kit with correctly profiled lead aprons; concrete interlocking tiles in Blacon need a corrugated tile kit. We specify the correct Velux flashing system for each roof covering type and install to the manufacturer's standard — which is what the guarantee requires.
Free survey included. We assess your Chester property before quoting — no guesswork, no surprises on the final bill.
10-year written guarantee on all Roof Windows Chester work across Chester and Cheshire.
“Velux installed by a builder three years ago had leaked from the first winter. Chester Roofing Experts removed it, found no proper flashing kit had been fitted at all, and reinstalled correctly. No problems since.”
“New Velux in our Hoole Victorian terrace — they specified the correct slate flashing kit and the integration with the Welsh slate is seamless. Very impressed.”
“Flush conservation roof light fitted in our Boughton Edwardian property — sits completely flat in the slate roof as required by the conservation area. Excellent quality installation.”
In most cases, failed Velux flashings are the cause. Either no proper flashing kit was installed (rubber collar only), the wrong profile flashing kit was used for the tile type, or the flashing was not correctly lapped with the surrounding roof covering. All of these are installation errors. We assess the existing installation and replace the flashing to the correct standard.
Welsh slate requires a Velux EDL or EDJ slate flashing kit (depending on the tile format) with individually cut lead soakers interlacing with each slate course. The lead apron at the base must be step-dressed into the tile joints. The correct kit and installation sequence is detailed and must be followed precisely — we carry out this work regularly on Hoole and Boughton properties.
We can supply Velux and equivalent-specification roof windows as part of the installation package, or work with windows you have already purchased. We advise on size and specification during the survey.
Yes. Conservation areas in Chester generally permit flush conservation-profile roof lights that sit within the roof plane without projecting — these are the correct product for Chester's Victorian and Edwardian stock in Hoole and Boughton. We advise on planning requirements during the free survey.
In most cases no. Roof windows that sit flush with the existing roof slope and do not project above the roof plane fall within permitted development rights. Conservation area properties in Chester require more care — we advise on consent requirements at the survey stage.
A single Velux installation on a Chester property typically costs £600 to £1,200 for a standard fixed or centre-pivot unit including flashings and making good the tile surround. Larger units or multiple installs are quoted individually. Free surveys across all Chester postcodes.
Yes with care. Welsh slate requires hand-cutting around the window surround rather than breaking tiles to fit. We use Velux's own flashing kits specified for slate profiles, and can source matching reclaimed Welsh blue slate for making good the tile surround.
No call-out fees. No obligation. An honest quote from a local Chester roofer.
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