Velux window installation into slate and tile roofs across Llandudno and the North Wales coast. Trade supply pricing, correct flashing systems for coastal conditions, conservation area guidance. Free quotes.
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Roof-window problems are usually leaks around the flashing kit, failed seals letting in draughts or condensation, or an old unit due for replacement.
When it is not the answer: If only the flashing kit has failed, re-flashing the existing window is cheaper than a new unit. Read the full guide.
We supply and install Velux and equivalent roof windows across all Llandudno property types — from Victorian Penrhyn slate terraces to modern concrete tile semis in Craig-y-Don.
Full supply and fit including structural opening, correct Velux flashing kit for your specific roof covering, and complete tile or slate redressing. Most single-window installs completed in one day.
Get a quote →Existing Velux windows leaking are almost always a flashing issue. We diagnose, specify the correct kit and install it properly — no unnecessary window replacement.
Get a quote →Velux installation into Penrhyn Blue slate requires the EDL flashing system and careful slate cutting. We carry out this work regularly on Llandudno Victorian and Edwardian stock.
Get a quote →Multiple Velux installations for loft conversions, including structural openings and weatherproofing to building regulations standard. We manage the roofing element of loft projects.
Get a quote →Roof windows on Llandudno homes have to cope with Salt-laden Irish Sea wind off the Great Orme drives rain into west-facing elevations and speeds corrosion of fixings. That is exactly the condition that finds a poorly-flashed window, so the flashing kit and the way it is dressed into the surrounding covering matter far more here than the window itself. We specify the correct kit for your covering, dress it properly, and check the seals and internal reveal too, because a leak or cold draught around a roof window is almost always the flashing or the fit, not the glazing unit.
Adding a new roof window to a Llandudno loft or extension is one of the highest-value improvements you can make — light transforms a dark loft room — but the position matters as much as the window. We look at the pitch, the covering, the rafter layout and which way the roof faces before recommending a position, because a window sited for the view but flashed into a difficult junction is a window that will give trouble. Get the position and the flashing right and a roof window is trouble-free for decades.
We fit and re-flash all the major roof-window brands, matching the flashing kit precisely to your covering — slate, plain tile or interlocking tile all need a different kit dressed in a different way. That match is what keeps a roof window dry on an exposed Llandudno roof, and it is the detail cheaper installers most often get wrong. We also handle the internal side properly — forming or making good the reveal, so the finished window looks right from inside the room as well as keeping the weather out.
"Two Velux windows installed into the Penrhyn slate on our Victorian terrace loft conversion. Correct EDL flashing kit, slates relaid neatly. No leaks and looks right for the property."
"Single Velux into the rear slope of our Penrhyn Bay semi. Done in half a day, full waterproof seal, tiles perfectly relaid. Excellent job."
"Velux had been leaking since installation by another contractor. Wrong flashing kit used. These guys fitted the correct EDW system. Bone dry ever since."
We assess the existing opening or the proposed position, pitch and covering.
Supply-and-fit or re-flash priced clearly, with the flashing kit specified for your covering.
Tiles or slates set back, timbers checked, and the opening prepared to size.
The window set in and the flashing kit dressed into the surrounding covering to shed water.
Water-tested, internal reveal made good where included, and handed over.
| Job | Typical duration |
|---|---|
| Re-flash existing window | Half a day |
| Replace like-for-like unit | Half to full day |
| New window into existing roof | 1–2 days |
| Multiple windows | 2–3 days |
| Internal finishing (added) | +1 day |
We keep the opening weathertight through the fit; heavy rain can move an install day.
Roof-window work runs from a tower or scaffold depending on pitch and height, plus internal access to the loft. Scaffold is specified for: first-floor and steep-pitch installs where safe external standing is needed - always itemised in your written quote, never a hidden extra, and we arrange it.
Victorian and Edwardian terraces around Craig-y-Don and the town centre often mean rear-access scaffold and permit-controlled pavement space near the promenade. Pavement scaffold and skip permits go through Conwy County Borough Council; allow a few working days on streets like Mostyn Street, Madoc Street, Builder Street where space is tight.
| Job | Typical range | Notes |
|---|---|---|
| Re-flash existing window | £250–£450 | New flashing kit |
| Replace like-for-like | £450–£900 | Supply and fit |
| New window into roof | £900–£1,800 | Including opening |
| Larger / multiple units | £1,800–£3,500 | Per project |
| Internal finishing | £200–£500 | Reveal make-good |
Worked example: A a new roof window into an existing slope on a Victorian terrace off Church Walks worked out around £1,250 including access and waste removal.
Deposit for the window on order for supply-and-fit; balance on completion.
Fitting workmanship is guaranteed for 10 years; Velux and other units carry their own manufacturer warranties (commonly 10–20 years).
If a fault appears in covered work, we come back and put it right. No quibbling, no re-charge.
Some internal dust where the opening is formed — we sheet the room below; external work needs only agreed access. You do not need to stay home for external work - we just need power and access agreed in advance.
We only open a roof for a window in a dry window and keep it covered between stages. Salt-laden Irish Sea wind off the Great Orme drives rain into west-facing elevations and speeds corrosion of fixings.
A single Velux window installed into an existing pitched roof in Llandudno typically costs £800–£1,400 depending on window size, roof covering type, and lead flashing specification. Multiple windows on the same visit reduce per-unit cost. We supply at trade prices and include all flashings and surrounding tile/slate redressing.
In most cases, Velux windows are permitted development as long as they don't protrude more than 150mm from the existing roof plane. Properties within Llandudno conservation area, listed buildings, or designated areas may require Conwy County Borough Council consent. We advise before quoting.
Yes — Velux installation into Penrhyn Blue slate, reclaimed slate and modern slate roofs is work we carry out regularly across Llandudno. We always use the correct Velux EDW or EDL flashing system for slate roofs to ensure a weathertight result.
A single window into an existing pitched roof takes 3–5 hours including structural opening, correct flashing installation and tile or slate redressing. Two windows on the same roof are typically completed in a single day. The roof is fully weathertight on the day of installation.
Yes — leaking Velux frames are almost always a flashing issue rather than the window itself. We inspect, identify whether the problem is a flashing, frame seal or condensation issue, and fix it properly without unnecessary window replacement.
No call-out fees. No obligation. Just an honest quote from a local Llandudno roofer who turns up when they say they will.
01492 339 101