Skylights and rooflights in Birstall

A planning question about a skylight in Birstall goes to Charnwood Borough Council. The village is a civil parish inside the Charnwood borough, and the council's planners decide anything that needs an application. On a normal house the answer is usually that no application is needed, because Class C, written into the 2015 rules, lets a rooflight through so long as three limits are kept. The unit may project only 150mm from the slope. Its top must sit lower than the roof's highest point. And a side-facing slope takes obscured, fixed glass unless the opening light begins above 1.7m.

The planning register lists a conservation area named Birstall, which sits within a hundred metres of the village centre point. It has six listed buildings recorded inside it, all Grade II, with its designation date missing from the register. Being within the conservation area is not enough to end those Class C rights; only an Article 4 direction has that power, and the council alone can tell you whether your road is affected. Listing is stricter again: for a listed house, any new rooflight, however small and however well hidden, requires listed building consent first.

Planning is one gate; Building Regulations is another. Opening a roof up is building work, approval or not. Should the job be notifiable, the notice goes in from our side, to the council's inspectors, or else to a registered approver, with the paperwork kept alongside the job.

One more habit is worth explaining. When the register says a house is listed, we do not guess at what the consent will allow. We tell you what the listing record says, we say that Charnwood's conservation officer is the person who answers the question, and we leave the application to the owner to submit. Nothing is cut until the answer is in writing.

That is also why we like to see the roof before talking about glass at all. The survey costs nothing, followed by a written, fixed quote that settles the figure before any scaffold goes up. If the work is a loft job, we also talk through where the stairs arrive, because a roof window is only worth having in a room people can reach.

Birstall is a large village, three miles north of Leicester city centre and part of the wider Leicester Urban Area. Its growth began when the Great Central Railway arrived in 1899. Between 1901 and 2001 the population climbed from 611 to over 11,000. A place that grows that fast does not get one kind of roof. It gets layers, and the layers matter to anyone planning a skylight, because each one is framed differently and asks for a different answer.

The village occupies land west of the A6, between the Gates estate and the A46. In the north-west there is a large housing estate leading off Greengate Lane. We make no promises about the exact age or style of any one street there, and that is the point of a survey: rafters, purlins, ceiling joists and insulation are all counted on site, not assumed from a postcode. What can be said is that an estate of that size is full of lofts with similar bones, and the fit that works on one house is often close to the fit that works on the next.

Reading a loft before you cut it

With the hatch open, the first thing we look for is whether the roof is built from rafters and purlins, or from factory-made trussed rafters in which every timber is doing a calculated job. In the first, a roof window can usually sit between rafters or replace a short length of one with a trimmer. In the second, the framing is less forgiving, and the position of the opening has to follow the timbers instead of your wishes. Either way a roof window is a well-trodden answer, and a good installer can tell you which version you have the moment the hatch is open.

Then there is Hallam Fields, where construction began in 2006. A development that age is still young for a roof, and the opportunity there is rarely a loft conversion. It is the rear kitchen or family room, extended since with a flat roof and a plain ceiling. A flat-roof rooflight sitting on a kerb (the raised upstand under the glass) will put a pool of light on the dining table and leave the garden end of the room as bright as it was.

The estates behind the A6 share one useful trait: a lot of them were built to a plan. When a street was put up in one go, the roofs on it often have the same pitch and the same timber layout, so one survey says plenty about the next house along. That does not replace looking at yours, but it does mean the first visit can be quick and the advice specific.

Older parts of the village, nearer the six listed buildings, are a separate conversation. A slim frame in a conservation rooflight, laid close to the slates or tiles, keeps the roof looking like itself. We would rather propose a smaller opening that nobody notices from the lane than a large one that everyone does.

The Grand Union Canal runs along the eastern side of the village, and next to it lies Watermead Country Park, a string of lakes in the bottom of the Soar valley, set aside for recreation. The named water within a kilometre and a half includes the River Soar and several lakes, among them Mammoth Lake, Jelsons Lake and Horseshoe Lake. Birstall Nature Reserve is about 1.3 km away, with the Reedbed Nature Reserve at 2 km and Bennion Pools Nature Area at 2.5 km, so the village is green at its edges as well as built up. All of it sits in low ground beside the village, and none of it changes what a rooflight has to do. The sun still arrives from the south and west, and the room beneath still has to cope with it.

Sunlight is wonderful in the morning and can be a nuisance in the afternoon. A south or west-facing rooflight over a sofa can turn into a heater by four o'clock. This is what energy-efficient rooflights are for: the glass is specified for the way the room is used, so a bedroom gets a different pane from a kitchen, and the choice is made at the survey, not on the day of fitting.

Where no slope sits above a dark landing or bathroom, a sun tunnel takes daylight from a little dome on the roof and sends it down a reflective tube into a windowless hall or washroom, and the layout stays as it was.

Reflected light off water is a real thing, and a bright, wide sky is what a rooflight is best at catching. A north-facing slope gives an even, calm light all day, which is what a studio or a home office wants. A south-facing one gives warmth and brightness, and wants a tinted or coated pane if the room is to stay comfortable in July.

Ask for a survey whenever you like. We measure, photograph and talk it through, then send a written quote with the figure fixed. A guarantee of ten years covers the workmanship. Begin with a quote request and leave the way in to us.