Skylights and rooflights in Coventry

Coventry is a cathedral city and metropolitan borough in the West Midlands, on the River Sherbourne, and it has been a large settlement for centuries. Much of what stands on its streets was driven by work. The Coventry Canal opened in 1769 and tied the city to the national canal network. By the 1890s Coventry had the largest bicycle industry in the world, though bicycle making declined from then on and ended entirely in 1959, when the last maker left. In recent years the city has moved away from manufacturing towards business services, finance, research, design and development, and creative industries.

The housing followed the work. With the industrial base still climbing after the Great War ended in 1918, numerous private and council developments went up across the city in the 1920s and 1930s, to house the large influx of workers who came for the factories. Those interwar suburbs are where a roof window earns its keep: the loft is already there, the headroom may well be decent, and the room under it has nothing but a hatch to let light in.

Then there is Starley Road. One street of Victorian terraces remains inside the ring road, saved from demolition in the 1980s by a campaign among its residents. A terrace brings a particular set of roof problems. The slopes are short, the houses share walls, and the neighbours are close enough to see what you are doing. A big opening would look out of place; a small roof window or a slim rooflight set just below the ridge looks like it belongs.

Not every room has a sloping roof above it. A bathroom at the back of a terrace, a landing between two bedrooms and a hallway that has never had a window all depend on borrowed light. Which product serves them depends on what lies above: a floored loft suggests a tunnel, an open roof space suggests a window on the nearest slope, and a flat roof suggests a rooflight set into it.

Flat roofs turn up in every era. A rear kitchen added to a house from the 1930s, or a flat-topped bay on a terrace, is usually bright at the glass end and dim at the worktops. A flat roof rooflight in the middle of the ceiling fixes that, provided it stands on a kerb tall enough to shed water and built level enough to seat the frame.

New glass in an existing home answers to Part L 2021, which gives roof windows a target of 1.4 W/m²K (a good WER band B label also counts) and rooflights a target of 2.2.

Planning questions for the city go to Coventry City Council. An unlisted house with no special controls can usually take a rooflight as permitted development, using Class C of the 2015 order. Three conditions come attached. Projection is capped at 150mm past the slope's surface. Height is capped by the roof's top edge. On a side slope the pane needs frosted or similar glass and a closed frame, with one exception: a sash starting over 1.7m up from the floor.

The city is unusual for how many protected areas gather near its middle. The register records thirteen conservation areas within roughly 1.4 kilometres of the centre point. Hill Top and Greyfriars Green hold the most listed buildings of the group, 24 recorded in each. At Hill Top six are Grade I and six Grade II*; at Greyfriars Green nearly all are Grade II. Spon Street has 23. The table gives the headline figures for six of them.

The others in the same group are Lady Herbert's Garden and the Burges, Naul's Mill, Spon End, Kenilworth Road, London Road, Earlsdon and Chapelfields. By itself a conservation area leaves Class C standing; what to watch for is an Article 4 direction, and with this many areas in one city it is worth asking the council street by street. Where a house is listed, listing consent has to be obtained before a rooflight goes in, however small. Flats and maisonettes have no householder rights at all.

Where a conservation area applies, appearance counts as much as permission. A conservation rooflight lies close to the slope, has a thin frame and a single central bar, and reads from the street as part of the roof rather than something laid on top of it. That matters in a place where so many of the surrounding buildings carry a listing.

The practical test for any address inside the central ring of areas is three questions asked in order. Is the building listed? Is it a flat or maisonette? Has the council placed an Article 4 direction on the street? Each answer is held by the council or on the national register, and we collect them before we quote, so that the price you receive is for a job that can go ahead.

Whatever the planning answer, cutting through a roof is building work. If a notification is due we send it ourselves, to whichever of the council or a private approver suits the job.

The drive from Leicester is 26.2 miles to the south-west and takes about 40 minutes. Five motorways run near the city, the M1 and M6 among them, and ten classified roads lie inside a kilometre of the centre, the A429 and A4600 included. Coventry station is open, roughly 0.9 kilometres in from the centre, while the old Coundon Road station, a kilometre out, is closed. For a visit, the road is how we arrive.

The River Sherbourne has a curious history. It runs under the city centre, paved over during the rebuilding that followed the Second World War, and is not commonly known. The Coventry Canal passes close by, and Coombe Country Park, the city council's only country park, lies just outside the boundary. None of this changes how a skylight goes in, but it explains why the middle of the city is a place of culverts, basins and bridges, and why a roof close to the water can be a good deal more visible than the owner expects.

Around the centre, the map names a ring of districts: Hillfields, Spon End, Bishopsgate Green, Lower Stoke, Earlsdon, Cheylesmore, Ball Hill, Chapelfields, Stoke Heath, Coundon and Radford. Each sits between roughly one and two and a half kilometres from the middle. Each has its own streets, and a survey in one will not tell you what a survey in the next will find. So the first visit is always to the roof itself, with a torch in the loft and a tape on the rafters, and the notes we take there go straight into the written quote.

On a larger house with a kitchen or garden room under a flat roof, a roof lantern gives height as well as light. A lantern projects well beyond the 150mm that applies to rooflights, which makes a conversation with the council sensible before one is ordered. We raise that early, because a lantern is made to order and the answer should arrive before the glass does.

Where a rooflight sits high over a stair or a double-height kitchen, an electric opening rooflight is worked from a wall switch or remote, so the stale warm air can leave without a ladder. Warm air rises, and the roof is where it should leave.

Loft rooms need the fire rules explained. Fire guidance in Approved Document B reserves escape-window status for low floors, up to 4.5m. Convert a loft above two storeys and the exit becomes a protected stair, so it falls to the roof window to bring daylight and a breeze.