Skylights and rooflights in St Donats

St Donats is a village in the Vale of Glamorgan, and its Welsh name is Sain Dunwyd. It is best known as the home of St Donat's Castle, which dates from the 12th century and is now an international boarding school, Atlantic College, the first of the United World Colleges. St Donats Arts Centre stands in the castle grounds.

The village church is dedicated to St Dunwyd and lies in a depression. From the outside it is unremarkable, but inside the Stradling chapel holds monuments to the Stradling family. The building is a 12th-century Grade I listed church, and the medieval cross in its churchyard is Grade I listed as well.

Those listings are a useful reminder of how heritage law works in Wales. Consent is needed for work that affects a listed building's special character. A house elsewhere in the village is not listed simply because the church is; each building has its own record, and Cadw publishes them in Cof Cymru.

St Donats sits south-east of Swansea, 29.21 miles away by road, near the limit of what we cover. Neighbours that we also serve include Wick and Cowbridge.

This is a general outline of house types and not a record of St Donats homes. Older cottages and houses usually have pitched roofs with a rear slope that suits one or two roof windows. Newer homes bring tiled pitches and, where there is an extension, a flat roof.

The castle and the church share a century, the 12th, and that age sets the tone for the village. For anyone adding a modern rooflight, it is a reason to establish what a house is before choosing glass for it. Is it listed? Is the roof original? The answers shape every step that follows, from the council to the fixings, and they are quick to find out.

Ordinary homes need the same preliminary look. The roof covering, the pitch and the structure underneath each affect what can be fitted, and none of them can be read from the road. A survey is where those facts are gathered, at no charge.

Planning decisions in St Donats rest with the Vale of Glamorgan Council. If your house is listed, the first question is not about permitted development at all: a rooflight that would affect the building's special architectural or historic interest needs listed building consent, under the Historic Environment (Wales) Act 2023, and the application goes to the local planning authority, with Cadw consulted. Our guide to rooflights on listed buildings covers it. Cadw notes that replacing traditional windows with uPVC on a listed building will not normally be acceptable, so materials are worth raising with the council early. Carrying out work without consent can be a criminal offence.

For a house that is not listed, the route is different. A rooflight can sometimes be permitted development, subject to the conditions in our Welsh planning guide. Not every house has that option. Flats and maisonettes have no householder permitted development whatever, and a council can remove it for an area through an Article 4 direction. A condition on the house's first permission can have the same effect.

The Gower AONB is a long way off and has no say in a St Donats job. Anyone who is unsure how the rules apply to their own address can ask the council's planning team, and a Lawful Development Certificate puts the council's answer on record.

Building Regulations are a separate matter. A new rooflight opening generally needs approval, because the roof is usually altered and has to carry the weight. Where the work is notifiable, we handle the Building Regulations notification with local authority building control or a registered building control approver.

The choice of who checks the work is yours. The council's building control team is one, and a private registered approver is the other. Neither replaces the planning side, which stays with the Vale of Glamorgan Council whichever you choose.

For any house, listed or not, a survey comes before a price. A fixed written quote follows the visit, and a 10-year workmanship guarantee is set down in writing when the job is complete.

An older house calls for care with the roof, and the conservation rooflights range is built for the purpose. VELUX describes one with a laminated inner pane under a toughened outer pane. Whether it suits your house is something to settle with the council.

A loft room asks for a roof window. In Wales a new or replacement one should reach 1.4 W/m²K, or Band B on the Window Energy Rating scale. If the window is meant to serve as a way out from an upstairs room, it has to be sized and placed for that job, and the roof windows page says where the rules are written down.

Behind or beside a house, a single-storey extension with a level roof suits a flat roof rooflight, and in Wales a rooflight should reach 2.2 W/m²K. A roof lantern usually stands well above the roof surface. If the extension is not yet built, we ask the Vale of Glamorgan Council for its planning view on the lantern.

A landing that has a loft above and no wall to the outside suits a sun tunnel. A dome in the slope gathers daylight and a mirrored tube sends it to a diffuser in the ceiling.

A bathroom or a loft shower room is where a roof window works hardest. The glass faces a rising column of steam after every shower, so the pane's inner face wants to stay warm and the room wants an extractor that keeps running once you have left it. A handle within reach means the window can be opened a crack for airing once the worst has passed.

Roof windows can open by motor. VELUX makes solar and electric models whose sensor closes the sash when rain falls, and the electric opening rooflights page sets out the choices for a room you air while you are out.

Replacement is part of the work as well. Fog between the panes of an older rooflight points to a failed seal, and we handle misted rooflights alongside new installations. Any like-for-like swap of a window or roof window counts as building work, though repairing one does not.

Rooms with a basin or bath bring steam, and steam heads for the coldest pane. A window that opens a little for airing, with an extractor beside it, keeps the glass clearer. Where a window is replaced, Approved Document F (Wales) normally applies, with the aim that the home breathes at least as well afterwards.

The sequence for every job is a free survey, a fixed written quote and a workmanship guarantee of ten years, put in writing. Ring 01792 929062 or send the enquiry form.