Skylight and rooflight fitting in Coelbren

Coelbren, in Welsh Y Coelbren, is a small rural village within the community of Tawe Uchaf, in southernmost Powys. Census figures for 2021 give the Coelbren built-up area 287 usual residents. From 1873 it was the site of a significant junction on the Neath and Brecon Railway, where a 7-mile branch diverged to the Swansea Vale Railway at Ynysygeinon. The Brecon Forest Tramroad had been built through the village in the 1820s.

The contractor John Dickson had a terrace of houses constructed, quite possibly for navvies working on the line. It was known originally as Dickson's Row and is now known as Price's Row. It is a note about one terrace, not a description of the village's homes.

The village hall has its own place in the record. The original Coelbren Welfare and Memorial Hall was built towards the top of Station Road in 1925 and served until the 1990s, when the current building was constructed. A school opened in the village in 1894, housed at first in the vestry of Moriah Baptist Chapel.

The name is old. First edition Ordnance Survey maps show Coelbren applying to a farmhouse and chapel before the modern village developed, and it is recorded as Tyre y Kolbren in 1503, where it signifies the sharing of land by drawing lots. A coelbren has been translated, among other things, as an inscribed piece of wood or omen-stick. Remains of a Roman fort here are now much degraded.

Swansea is about 19 miles away by road, with Coelbren to the north-east, well within our 30-mile area. Banwen and Glynneath are nearby places we also cover.

Villages that grew around a railway tend to have rows of houses built close together in one go. Rows of that sort share a roof line, and a roof window on one house can affect the look of the whole row, which is one more reason to look at the street as well as the house.

Powys County Council takes planning for Coelbren, and a house-by-house answer comes from the council. Coelbren is not in the Gower AONB.

Plenty of small jobs on a house never need an application at all. The limits for those are collected in our planning guide, which also covers what lies beyond them.

Three situations change the answer. Flats and maisonettes sit outside householder rights entirely. Houses are different: an Article 4 direction can strip their rights, and so can a restriction written into the first consent. Listed houses require listed building consent for anything that touches their character, and the local planning authority handles that application, with Cadw consulted.

On the Building Regulations side, a fresh hole in a roof generally brings approval into play, since the structure is usually changed and carries new weight. When the work is notifiable we manage the notification and send it to your choice of local authority building control or registered building control approver.

To have an answer in writing before you spend anything, ask Powys about a Lawful Development Certificate.

A terraced house tends to have a stair that runs between two walls, and the stair is where daylight goes to die. A window in the roof above it is one answer when the roof space is open. A sun tunnel is the answer when the space above is cluttered or too shallow. It comes as a short dome outside, a tube across the loft and a diffuser set into the stairwell ceiling.

The route of the tube decides how well it performs, and the first look is into the roof space. Straight and short is better than long and bent, and a clear path past rafters, wiring and a tank matters more than the size of the dome.

A loft room makes a different request. The top-hung roof window opens clear of the head. A bedroom in the roof needs a way out in a fire, and a roof window counts as one only when its size and position were chosen for that. The roof windows page gives the types.

At the back, a level kitchen roof suits a flat roof rooflight or a roof lantern. A rooflight on a kerb should reach 2.2 W/m²K under Approved Document L (Wales), and a new or replacement roof window should reach 1.4 W/m²K, or Window Energy Rating Band B. On a lantern for a new extension, the figure is agreed with the building control body.

A unit with moisture between the panes has normally lost the seal on its glass, so the glazing has to go. Our page on misted rooflights explains the swap, and we can match the size.

You start with a free survey, then get a fixed written quote, and our 10-year workmanship guarantee comes in writing. Call 01792 929062 or book a survey.

Brightness is not only a matter of size. A small, well-placed pane over the middle of a room lights it more evenly than a large one pushed into a corner. Put the glass where the light is missed, then decide how big it needs to be, and let the survey tell you what the rafters or joists will allow.

Think about the weather at the door of the room, too. A bedroom under the slope, a bathroom beside it and a landing between them can all take different glass. Give each room the product it suits, and the roof stays tidy: pairs of matching windows on one slope look right from the street, and a single dome on the opposite slope does not clash.