Velux window installation, replacement and flashing repair across Cheltenham and Gloucestershire. Correct specification for clay, slate and stone tiles. Conservation area advice included. Free surveys and written quotes.
Loft conversions are common across Cheltenham's Victorian and Edwardian suburbs, and Velux windows are the standard solution. Getting the flashing specification right for clay tiles, plain tiles or Welsh slate is critical — it is where most failures begin.
Supply and fit of Velux GGL, GGU, GPL or GPL roof windows in sizes from 55x78cm to 114x118cm. Includes structural opening, flashing kit specified for tile type, and internal lining. Conservation area advice included in survey. From £450 per window.
Get a Quote →Failed or incorrectly fitted flashings are the most common cause of Velux leaks. We replace with Velux EKL, EDL or BFX flashing kits as appropriate for your tile type and roof pitch. Often resolves a persistent leak without needing to replace the window unit. From £200.
Get a Quote →Velux windows from the 1980s and 1990s are at end of life — failed seals, broken mechanisms, non-energy-rated glazing. We replace old units with current Velux models using matching size openings where possible. From £500 including new flashing kit.
Get a Quote →Not sure if your leak is from the window or the flashing? We carry out diagnostic inspections on existing Velux installations and report on the source before quoting for repair. Many Velux leaks are flashing failures, not window failures — important to know before replacing the unit.
Book Survey →Cheltenham's conservation areas and listed buildings place restrictions on roof window types and positions. We advise on planning requirements at survey stage — in some zones, conservation roof lights flush with the tile plane are required. We specify and fit compliant solutions.
Enquire →Velux solar-powered opening roof windows require no electrical cabling and are suitable for properties where hardwired installation is impractical. We supply and fit the VSE and VSS solar ranges with rain sensors. From £700 per window installed.
Get a Quote →Velux roof window installation in Cheltenham costs £850–£2,500 per window supplied and fitted, depending on size and roof type. We install into slate and tile roofs with correct flashing kits for a watertight seal. Work carries a 10-year guarantee. Call 0124 235 2251 for a free quote.
Cheltenham's varied housing stock means no single flashing specification works across the whole town.
Victorian and Edwardian terraces in Cheltenham — Fairview, St Paul's, Charlton Kings — often have clay plain tiles. Velux flashings for clay plain tiles require EDJ or BFX specification. A standard EDL flashing on a clay plain tile roof will fail within 2-3 years.
Natural Welsh slate requires EW combination flashing kits. The thin profile and irregular surface of Welsh slate is not compatible with standard EDL flashings. We specify correctly at survey for every property type before fitting.
In Montpellier, Lansdown, Pittville and the wider Regency conservation area, roof windows must often be conservation-type flush lights that sit flush in the roof plane rather than projecting. Standard Velux may not be acceptable — we advise before any work is committed.
Most Velux installations qualify as permitted development and do not require planning permission. Exceptions include listed buildings, conservation areas and some article 4 directions. We check your specific property situation as part of every free survey.
"Two Velux windows fitted in our Victorian loft conversion in Fairview. They specified the correct flashing for our clay plain tiles without me having to ask — a previous quote had the wrong type. No leaks since installation and the loft is transformed."
"Velux flashing replacement on our Charlton Kings semi — the original installer had used the wrong flashing type on our clay tiles and it had been leaking for two years. Correct EDJ flashing fitted, no leak since. Should have been done right the first time."
"Replacement of three original 1990s Velux windows on our Prestbury Victorian. Old units had failed seals and draughts. New GGL windows with correct flashing kits — warm, watertight and properly warranted. Good value for the improvement."
A standard centre-pivot Velux supply and installation costs £600–1,200. Larger fixed or top-hung units cost £900–2,000 installed. Prices include making good the surrounding roof covering.
Standard Velux windows not projecting more than 150mm above the roof plane and not on the front elevation fall under permitted development. Conservation area properties or listed buildings may need consent. We advise at survey stage.
Yes. For conservation area properties we recommend the Velux conservation window range with flush-fitting profiles and discrete flashings that meet planning officer expectations.
The standard recommendation is glazed area equal to at least 10% of the room floor area. For a typical Cheltenham loft bedroom, a 78cm x 118cm or 94cm x 118cm centre-pivot unit is most common.
A single Velux in a standard Cheltenham property typically takes one day including making good the surrounding roof covering. Multiple windows take longer and are quoted individually.
Centre-pivot units work in pitches from 15 to 90 degrees. Very low-pitch applications need a flat-roof Velux unit. We specify the correct product for your roof during the free survey.
Standard Velux double-glazed units should not cause condensation in a properly ventilated loft. If condensation is already present it indicates insufficient ventilation, which we check at survey stage.
We survey existing or planned Velux installations for free and advise on the correct specification for your tile type and conservation area status.
0124 235 2251