Skylights and rooflights in Neath

Neath, in Welsh Castell-nedd, is a town with a long record. It stands at a ford of the River Neath, and its position shows in the Celtic hill forts around it. The name has been read as meaning shining or brilliant, and also as simply river, from an older Indo-European root. The River Neath is a navigable estuary, and Neath was a river port until recent times.

The Romans were here too. Much of the site of their fort is on the grounds of Dwr-y-Felin Comprehensive School. Archaeological digs have found gate-towers extending beyond the fort's walls, a feature unique in Roman Britain, together with a large marching camp that could hold thousands of troops. Those finds point to the unusual measures the Romans took while the native Silures resisted.

Coal was mined across the surrounding valleys, and canals and railways turned Neath into a major transport centre. The Evans and Bevan families were big names in local coal mining and owned the Vale of Neath Brewery. The Mackworth family, who held the Gnoll Estate, played a prominent part in the town's industrial growth. Trains on the South Wales Main Line stop at Neath, and National Express coaches call at the station. In more recent planning, the area around the Milland Road Industrial Estate and the Neath Canal was marked for redevelopment.

At the 2011 census the town had 50,658 people and the community of the parish 19,258. Neath lies 9.29 miles up the road from Swansea, to the north-east, which is well within the area we cover. Tonna and Briton Ferry get the same service.

A town with that much history holds roofs of many ages and shapes. Terraces, extensions and later additions each ask different things of a rooflight, and what we say about house types here is general: your own roof may differ from any pattern, and the survey is where we find out.

Neath Port Talbot Council decides planning applications in Neath. A conservation area called Neath Town Centre appears on the Welsh Government's boundary data and covers the point we use for the middle of the town. Wales is firm about this: a rooflight put into a roof slope inside a conservation area needs planning permission. The data shows boundaries only and does not follow individual properties, so the exact address decides. You can look up the boundaries on DataMapWales and then confirm with the council.

Gower's AONB does not reach Neath, so that designation has no bearing here. Land in a National Park or a World Heritage Site gets the same treatment as a conservation area in Wales, and a house on that land needs a planning application for a rooflight in the slope.

Beyond those categories, a house can sometimes add a rooflight with no application, on the conditions that the Wales planning guide sets out. Flats and maisonettes sit outside that system because they have no householder permitted development rights. Some houses lose theirs too: an Article 4 direction can do it, and so can a condition on the original planning permission.

For a listed house, a rooflight that would affect its character needs listed building consent. It covers fittings and details inside as well as out, it is applied for through the council, and skipping it can bring a criminal offence with it. Cadw's consent guidance explains.

The Building Regulations come after, on a different track. Putting in a new opening will generally need approval, and the notification goes through local authority building control or a registered building control approver where the work is notifiable. We handle that for you.

Anyone who wants certainty before work begins can put the question to the borough's planners, and a Lawful Development Certificate then puts their answer in formal terms. It takes a little while to come through, and it stays useful as a record if you sell the house later.

Some Neath roofs already carry a unit that needs a decision. A VELUX roof window has its size code stamped on a metal plate, and you see it by opening the sash. The code gives the width and height, and VELUX lists examples such as MK04 at 78 × 98 cm, MK06 at 78 × 118 cm and UK04 at 134 × 98 cm. Reading it off the old window means the replacement can be matched to the opening before anyone measures the roof. Our guide to a like-for-like VELUX swap goes through the steps.

The new unit has a target to meet. Under Approved Document L (Wales), a new or replacement roof window should reach 1.4 W/m²K or Window Energy Rating Band B, and a rooflight should reach 2.2 W/m²K. See energy-efficient rooflights for what those numbers mean in practice.

Glass is the part with the most choice in it. On its flat glass rooflights VELUX offers a choice of double or triple glazing, and ties both to better energy efficiency and sound reduction. The choice depends on the room, and we go through it at the survey.

A roof window can also help a room breathe. Every habitable room needs a way to air quickly, and an opening window can supply it: how far it opens sets the size it needs. A hinged or pivoting window that swings out 30° or wider counts at a smaller opening area than one limited to 15° to 30°, and below 15° it counts for nothing. A loft room with a roof window is one place that sum comes up.

Over a flat roof the choice lies between a flat rooflight, which sits low on its kerb, and a roof lantern, which stands up on an upstand with glass on all its slopes. A lantern stands high above the roof, so on an existing flat roof it normally means a planning application; for a lantern on a newly built extension, the council receives the question. Where a roof is nearly flat, the pitch ranges in the rain section above decide between a dome and a low-pitch window, and our roof windows page covers the slope itself.

Every Neath job starts on the same terms: a survey with no charge, a fixed written quote afterwards, and a guarantee on our workmanship that lasts ten years and is given to you in writing. Call 01792 929062 or book a survey here.