Velux and skylight installation in Ashford (£600-£1,600 supply and fit) includes structural preparation, the correct flashing kit for your tile profile, and full weatherproofing. Most installations complete in a day. Call 01233 877 146 for a free survey and quote.
Roof window and skylight installation across Ashford and Kent. New installations, replacements and leaking flashing repairs. We supply, flash and finish in one visit. Free survey: 01233 877 146.
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Roof window installation is roofing work, not carpentry. The weatherproofing of the junction between the window frame and the surrounding tile or slate surface is the critical element of every installation — and the element most frequently done poorly. An incorrectly flashed Velux window leaks from day one or within the first winter. A correctly flashed window does not leak for decades.
Ashford's loft conversion boom during the 1990s and 2000s left a significant number of properties on Park Farm, Singleton and the surrounding modern estates with roof windows installed by builders rather than roofers. We receive a regular volume of calls from these properties where the original flashing was either the wrong kit for the tile type, incorrectly overlapped, or simply missing elements. In most cases the correct resolution is full flashing replacement rather than sealant applied over the existing installation.
Kitchen and bathroom extensions across Ashford's residential stock are increasingly fitted with flat roof skylights to add light to otherwise dark rear additions. The critical installation elements are the kerb height (which must be sufficient to prevent water entry in heavy rain), the drainage fall on the surrounding flat roof, and the quality of the upstand waterproofing where the kerb meets the flat roof surface. We install flat roof skylights in GRP-integrated kerbs that form a continuous waterproof junction with the flat roof system.
We assess the tile type, roof structure and planning position before quoting.
📞 01233 877 146
| Job Type | Typical Cost |
|---|---|
| Single Velux installation (supply & fit) | £600 – £1,200 |
| Two Velux windows | £1,000 – £2,000 |
| Velux flashing replacement (existing window) | £300 – £600 |
| Flat roof skylight (fixed, supply & fit) | £800 – £2,000 |
| Flat roof skylight (opening, supply & fit) | £1,200 – £2,800 |
Velux and equivalent roof windows installed in pitched roof slopes. Correct flashing kit for tile type included. Planning advice provided where required.
Existing roof windows with failed or incorrect flashing re-flashed with the correct manufacturer kit. Most leaking Velux windows in Ashford are a flashing problem, not a window problem.
Fixed and opening flat roof skylights in GRP-integrated kerb frames. Correct kerb height and upstand waterproofing for the drainage situation.
Roof windows for loft conversions in all Ashford housing types. We coordinate with builders and conversion contractors where required.
Seal replacement, mechanism repair and glass replacement on existing roof windows. We diagnose whether repair or replacement is the correct option.
Flush-fitting conservation rooflights for period properties in Ashford conservation areas. Correct planning advice included.
"Two Velux windows installed in the loft conversion. The flashing was done carefully into the concrete tile and there have been no leaks in two winters. Good installation."
"Replacement Velux — old one was leaking after 20 years. They diagnosed it as the flashing rather than the window, replaced just the flashing kit and saved us the cost of a full window. Honest."
"Flat roof skylight in the kitchen extension. They specified the correct kerb height for the drainage situation and the result has been watertight. Noticeably more light in the kitchen."
The Velux brand is the market-leading manufacturer of roof windows in the UK, and the name is used generically for all centre-pivot and top-hung roof windows regardless of manufacturer. For most domestic applications, Velux (or an equivalent brand) is the correct product — the quality is high, the spare parts are available for 20+ years, and the installation system is well-documented.
Fixed rooflights — non-opening polycarbonate or glass units — are the correct choice for areas where opening is not required, where planning conditions restrict visible protrusion from the roof slope, or where the budget does not extend to a full Velux installation. Fixed rooflights are significantly less expensive than Velux windows and provide an equivalent daylighting benefit where ventilation is not a priority.
Velux window installation involves: removing tiles from the area where the window is to be positioned; cutting the rafters to create the aperture (this requires structural assessment — the cut rafters must be supported by trimmer rafters fixed to adjacent uncut rafters); fitting the Velux installation frame to the trimmer structure; fitting the flashing kit to waterproof the junction between the window frame and the surrounding tile slope; and refitting tiles around the window perimeter. The interior finishing — lining and plasterboard around the window reveal — is typically done by the homeowner or a joiner following our roof installation.
Velux flashing kits come in different specifications for different tile profiles. The EDZ kit (standard) fits most concrete interlocking and modern clay tile profiles. The EDN kit is for flat tiles including clay plain tile. The EKW kit is for slates. Fitting the wrong flashing kit is a common cause of Velux leaks and is not always identifiable without close inspection. We specify the correct kit for each tile type at the survey stage.
Roof windows on a principal elevation (street-facing) require planning permission in conservation areas. On non-principal elevations, Velux windows that do not project more than 150mm beyond the roof slope are generally permitted development. Building regulations approval may be required if the roof window is being installed in connection with a loft conversion. We advise on the planning and building regulations position at the survey for every Velux installation.
A single Velux roof window installation including the window unit, flashing kit and internal finishing typically costs £600-£1,200 depending on the window size and tile type. Multiple windows reduce the per-unit cost. Flat roof skylights run £800-£2,000 depending on size and specification. Free survey and written quotes.
In most cases, roof window installation on a principal elevation that does not protrude significantly above the existing roof plane is permitted development and does not require planning consent. Exceptions include listed buildings, certain conservation areas and some new-build developments with Article 4 directions. We advise on the planning position at the survey stage.
Velux-type roof windows are installed in pitched roof slopes, lying flush or nearly flush with the tile surface. Flat roof skylights are installed in horizontal or near-horizontal flat roof surfaces, typically in a proprietary kerb frame with an upstand above the roof surface. Both admit light but require different installation methods and flashing specifications.
Yes. Velux and equivalent manufacturers produce flashing kits for all standard tile profiles including concrete interlocking, clay plain, natural slate and profiled clay. The correct flashing kit for your specific tile is included in our installation quote. Unusual or obsolete tile profiles may require a custom flashing solution.
A single Velux window on a standard Ashford property typically takes one day from start to finish including cutting the opening, fitting the window and flashing, and making good the interior. The loft space will need to be clear around the installation area. Dust and debris is managed on site.
Yes. Leaking Velux windows are a common call from Ashford properties built in the 1990s and 2000s where original windows are now approaching end of their sealing life. We diagnose whether the issue is with the flashing, the window seal or the window unit itself and quote for the appropriate repair or replacement.
Most Velux leaks are at the flashing rather than the window unit itself. Causes: incorrectly specified flashing kit for the tile type, deteriorated flashing after 15+ years, or flashings lifted by thermal movement. We inspect from outside and inside to identify the failure point before quoting.
Yes. Velux supply electric and solar-powered centre-pivot windows with remote control operation. Existing manually-operated Velux windows can be upgraded to electric operation without replacing the window unit.
Most installations are completed in a single day. Tile removal and refitting is localised to the immediate area of the window. Weather protection is maintained throughout — we do not leave an open aperture in the roof slope overnight.
Replacement of the window unit without replacing the flashing is possible if the flashing is sound. We inspect the flashing condition when replacing window units and advise on whether replacement is needed.
Free survey and quote across Ashford and all of Kent. Planning advice included.
01233 877 146Covering velux & skylights across Ashford and all of Kent.