A Kensworth skylight or rooflight that suits house and hillside
A village on the edge of Dunstable Downs, where a skylight has to suit the house and the hillside around it. Here is how a rooflight earns its place in Kensworth.
Village streets and outlying hamlets
Kensworth, a village and civil parish of Central Bedfordshire, sits on the edge of Dunstable Downs. The parish reaches beyond the village centre to take in the hamlets of California and Kensworth Lynch, so the homes here are spread across more than one setting. Each setting has its own pattern of plot, tree and neighbour, and that pattern decides where daylight can come from.
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Houses in the village itself
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Homes in California and Kensworth Lynch
Around the village centre, houses can stand close to their neighbours and to the lane. Even so, the back room of a village house can still face a boundary wall or a fence a few paces from the glass. That is the classic case for a roof window set into a pitched slope, or a flat rooflight over a rear extension: the side window can only look at the neighbour, while overhead the sky stays open.
Out in the hamlets the plots can be looser, with hedges, garden trees and longer gaps between houses. Trees are lovely in a window and a nuisance for daylight: a mature one can shade a ground-floor room for half the day and drop leaves on a flat roof in the autumn. A roof lantern on an extension, or a sun tunnel through a dark landing, takes light from the part of the sky the branches do not reach.
Finding daylight in a Kensworth home
A kitchen that backs on to a wall
The window is full size. The view is not.
Sideways
A rear kitchen in a village house can have a perfectly good window and still feel like a cellar. The glass looks across a narrow side passage to a high wall, and the daylight that arrives has bounced off brick before it reaches the room.
The wall also seems to grow taller as the sun drops. By mid-afternoon the worktop is in shade, the lights go on, and the garden beyond the wall might as well be in another county.
Straight up
If the extension has a flat roof, a rooflight can sit on an insulated upstand directly over the worktop or the table. It looks up at the sky, so the wall beside it makes no difference to what comes through the glass.
Straight up is clear. A wall, a fence or a neighbour's gable can block a side window, but nothing at the side blocks the open sky above the roof, which is why light from above reaches further into the room.
For a kitchen, the practical questions are where the light should land and how much heat the glass should let in or out. Over a worktop, one rooflight gives a bright working surface. Over a table, a larger pane or a pair spreads the light so nobody sits in a shadow. Sealed units with a low heat-loss rating keep the room comfortable in winter, and tinted or solar-control glass keeps a south-facing room from baking in summer. Our energy-efficient rooflights page explains the choices in more detail.
Roof coverings on flat extensions differ from house to house, so we look closely at the existing membrane and the structure under it before we recommend a size. The aim is a clean opening, a proper upstand and a finish inside that looks as if it was always there.
Terms you will meet on a flat-roof survey
Upstand
A raised kerb round the opening on a flat roof, which the rooflight frame sits on so water cannot pool against it.
Fall
The slight fall given to a flat roof so rain drains towards the gutter.
Sealed unit
Two or three sheets of glass bonded round the edge with a gap between them, which cuts heat loss.
Flashing
The strip of metal or membrane that seals the joint where a rooflight meets the roof covering.
Light well
The shaft or splay between the rooflight and the ceiling, finished so the light spreads into the room.
A stairwell with nothing to see by
Some corridors only ever see a lightbulb.
Sideways
In a two-storey house, the landing and stairs can sit in the middle of the plan, away from every outside wall. There is nothing to put a window in. Even where there is a small one at the end, it looks out at a fence panel or a neighbour's side wall and gives a thin grey glow.
The result is a part of the house you pass through with the light switch already on, and bedroom doors that open on to a dim space.
Straight up
On the outside a sun tunnel is a small rooflight; a reflective tube joins it to the diffuser in the ceiling. It runs through the loft space, collects daylight from the open sky and carries it down to the landing. Inside, the ceiling opening is neat, round or square; on the roof, the hole is small.
Where the loft has been converted, a roof window above the stairwell does the same job in a different way, putting a large pane of sky overhead.
A sun tunnel is a good match for a small hallway, a bathroom with no window or a walk-in wardrobe, because it asks little of the roof. The tube takes a route through the roof space that avoids rafters and wiring, so we check the loft before choosing the position. If the roof void is deep, a longer tube still works; the finish at the ceiling is what you see, and it is tidy.
Where the landing is wide enough, a larger opening, fitted as a fixed roof window with a light well, makes more of a feature. Both routes finish the inside properly, with plastering and decoration left tidy rather than a hole and a promise. Our sun tunnel and roof window pages show the options.
A terrace room under the trees
Leaf cover looks good and lets in little.
Sideways
A garden room or extension opening on to a terrace can look out on a fine old tree. In summer that tree is a screen of leaves, and the room behind the glass doors sits in green shade. In winter the branches are bare, yet the low sun means the light that does come in arrives at a slant that never reaches the back of the room.
Trees close to the house also shed leaves, seeds and sap, so a flat roof beneath them needs more attention than one in the open.
Straight up
A roof lantern rises above a flat roof like a small glass roof of its own, with sloping panes on all sides. It collects light from the high sky as well as from the sides, and it lets that light fall into the centre of the room, away from the glazed doors.
Because it is raised, a lantern also sheds debris more easily than a flat pane would, and the sloping glass is simple to keep clean. Our roof lantern service covers the frames, glass and finishes available.
In a village on the Downs edge, a lantern also has to sit comfortably in its setting. A frame in a dark grey or a muted tone sits quietly against the roof and the hedgerows. A smaller lantern may be enough; we judge that at the survey, standing in the room with the sky overhead.
Questions to settle before a survey
- Which room is darkest, and when in the day does it feel it?
- What blocks the side window: a wall, a fence or a tree?
- Is the roof flat, pitched or both?
- Is the house in the conservation area?
- Do you want the room opened up to the sky or only brightened?
Planning in an AONB village
Planning here is decided by Central Bedfordshire Council, and Kensworth sits inside the Chilterns AONB, now also called a National Landscape. That status matters for appearance. A rooflight on a back roof out of sight is a simple conversation; a large lantern on a roof that looks across open downland deserves more thought about colour, size and how the glass catches the light. The council also lists a conservation area named for the village, which makes checking whether an address falls inside it the first job.
A conservation area keeps your permitted development rights intact until an Article 4 direction takes them away, and a direction can apply to one street without touching the next. A listed building is a different case, with listed building consent needed for roof changes. The permitted development rules are laid out in plain language in our planning guide.
The council's own pages are worth a look before you decide: its planning and building page explains how to ask, and its building control page deals with the technical rules. Everything is installed to the Building Regulations in force, and we take care of the Building Control notification when the work calls for one.
If you are unsure about an address, a short enquiry to the council's planning team will tell you if an Article 4 direction covers your street, before any money is spent.
From Milton Keynes to Kensworth
Drive south-east out of Milton Keynes and Kensworth comes up after 20.5 road miles, a run of roughly 32 minutes. The route takes you out of the city and across Bedfordshire towards the Chilterns, so a survey visit fits within a working day without any fuss.
Neighbouring places on the same side of the county are Markyate, Caddington and Dunstable, and we work across all of them. A survey in one can sit alongside another in the same trip, which keeps the diary tidy.
Because Kensworth sits on the edge of Dunstable Downs, the weather can change between the car and the front door. Because the survey takes in the roof from outside and from the loft, it is planned around that, and poor conditions move the visit to a better day.
For an ordinary rooflight the work lasts a day or two, on a date you have agreed beforehand.
What the survey covers on a Kensworth roof
The survey is free. We start outside, looking at the roof covering, the position of the opening and how the chosen light will sit among its neighbours. Then we go inside and look at the room, the ceiling below, the structure above and anything that might be in the way: pipes, wires, a chimney breast or a steel.
Sun and shade get close attention. We note which way the roof faces, where trees throw shade at different times of day and whether the existing windows are being blocked by a wall, a fence or a branch. That tells us whether one rooflight will do or whether two, set apart, give a better result.
You then receive a fixed written quote that does not change on the day. It names the product, the size, the finish and what is included. Once you agree, work is booked, and the job is covered by our 10-year workmanship guarantee in writing.
A village shop roof or an outbuilding can be surveyed as readily as a house. WhatsApp 07880 284133 gets a quick reply, as does info@vertexskylightsmiltonkeynes.co.uk, and the quote form is there if you prefer it. The areas page lists the other places we cover.
Kensworth and the Downs: your questions
Does the Chilterns AONB stop me fitting a rooflight in Kensworth?
The AONB status does not ban rooflights, but it raises the bar on appearance. Central Bedfordshire Council can tell you whether your plans need an application. We can help you choose a size and finish that sits quietly in the roof, and the route to permission is explained in our planning guide.
Besides the AONB, is Kensworth also a conservation area?
The council lists one named for the village. Ask the planning team directly: is your address within it, and does an Article 4 direction cover the street? The answer decides whether a rooflight needs permission.
Is it possible to bring light to a windowless landing or hallway?
Yes. Daylight enters a sun tunnel on the roof, passes through the loft and reaches a diffuser set in the ceiling. The opening cut in the roof is small, and the inside is finished neatly.
Does your patch reach Kensworth, Dunstable and Markyate, and how far is the drive?
Allow roughly 32 minutes for the 20.5 road miles south-east from Milton Keynes. We work in Dunstable, Markyate and Caddington as well, so nearby addresses can be surveyed on the same trip.
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