Skylight and rooflight fitting in Swanscombe
Swanscombe is a Kent town on the Thames estuary with a past built on flint, chalk and cement. In houses of many ages, the rooms that go dim are often the small and inner ones: the box room, the utility, and a kitchen that has been pushed out into the garden.
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- 10-year workmanship guarantee
Which rooms stay dim in a Swanscombe house?
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1 The box room at the top of the stairs A box room usually has one small window onto the front or the back. A narrow roof window can light it, if the loft above leaves space between the rafters. -
2 A utility room with no outside wall A utility carved out of the kitchen or garage can end up with solid walls on three sides. A sun tunnel or a small rooflight on the roof above brings daylight to it. -
3 A kitchen extension with a long worktop The glazed doors light the end of the room. The run of units further in sits under a flat roof where a rooflight or lantern can put the light on the work surface.
A cement town and its small dark rooms
The ground under Swanscombe has been dug and burned for centuries; the rooms we light are far smaller.
Swanscombe is a town in the Borough of Dartford, sharing a civil parish with Greenhithe, and its ground has been worked for a very long time. Flint was the first mining activity known in the area, and deneholes are recorded along the Thames corridor. Cement came later. The first cement manufacturing works near Swanscombe was opened at Northfleet by James Parker around 1792, making Roman cement from stone brought from the Isle of Sheppey. By 1882 several makers were operating across north Kent, and the dust drove people in Swanscombe to take legal action against a local works. The tower and chancel of the parish church carry 11th- and 12th-century work, so the settled centre is older than any of that industry.
Small rooms in houses of any age
The layout of the small rooms is the clue. A box room sits over the entrance hall or stairs, has one window, and gets used as a study, a nursery or a place to keep a bike. A utility room sits against the kitchen or garage and has an outside wall on one side at best.
For a box room, a window set into the slope overhead is the usual answer when the loft above has been left as storage. Sizes are written as a code such as MK04, where the letters give the width and the digits the height, so a narrow room takes a narrow code and the shape of the rafters sets the limit. What happens inside the loft when a new opening is cut is covered in the guide to fitting into a roof that never had one.
A utility room is another matter, because there may be no roof directly above it, or a bedroom may sit over it. If the room sits under a roof slab or a lean-to slope of its own, a small rooflight is enough. If a loft lies directly above, a sun tunnel can pass through the roof void with a tube just a few hundred millimetres across, and the pages on how well sun tunnels work give the realistic picture of what they deliver.
Reading the loft above a box room
The loft side of a box room tells us more than the room does. We look for the depth of insulation laid over the ceiling, the position of the water tank or pipework, and any wiring that crosses the line of the opening. Timber that has been boarded over for storage may hide a purlin or a brace that decides where the unit can go. A box room is also often the smallest room in the house, so a few centimetres of splay on the lining change how much of the sky you see from the bed or the desk. We choose the position so that the lining clears the ceiling joists and the unit sits between two rafters wherever the layout allows.
What shifts the figure on a small-room roof job
- Roof coveringTiles or slates, and how cleanly they can be lifted and relaid around the new opening.
- The loft sideRafter spacing, insulation and any boarding that has to be cut or moved.
- Size of the unitA narrow box-room size and a wide pair are different units with different framing.
- AccessScaffold or a tower, and how far glass has to be carried through the house.
- Finish insideA lined, plastered reveal ready for paint, or a plain opening left for you.
Flat roofs over kitchen extensions
A rooflight here meets several layers at once, and each one has to be dealt with.
A flat roof over a kitchen extension is built in layers, and a rooflight meets every one of them: the deck on the joists, the insulation, the waterproof covering and the edge detail at the wall of the old house. That makes the kitchen extension a different job from the box room, which is a hole in a pitched slope. Here we look at which way the joists run, because a new opening for a rooflight can be framed between them and a long lantern can span more than one bay.
From measuring to a sealed ceiling
- Measure the opening Joist direction, upstand height and the roof build-up are written down at the survey.
- Order to the quote The unit is made or ordered to the surveyed size, with the glazing named in the quote.
- Cut, kerb and cover The deck is opened, the upstand framed and the waterproof layer dressed up its sides.
- Fit the unit and line it The frame goes on, the glass is closed in and the reveals inside are lined and finished.
Light over the worktop
In a kitchen the useful daylight falls on the places where you work. A long run of units along an inner wall is a good example: the garden doors at the far end brighten the end of the room, and the worktop several metres further in is lit by the ceiling lamp. A rooflight set over that run puts daylight where the knife and the chopping board are. A lantern, with glass on its sloping sides, spreads light further sideways than a flat unit does, and you can see more sky from inside it. On a smaller extension a flat rooflight in a thinner frame is the neater choice, and there are separate pages on both: flat roof rooflights and roof lanterns.
Rules that bite for an extension
The energy rule applies to the glass: Part L sets 2.2 W/m²K for a rooflight or roof lantern in an existing dwelling. Planning is the other question. A lantern standing on a flat roof usually projects more than the 150 mm that Class C allows, so we raise that with you at the survey, and our guide to planning permission for skylights shows how to confirm it with the council. A flat rooflight on a low upstand may be a different case, which is why we measure first.
Where the extension roof meets the old wall
The edge of an extension roof where it butts the original house wall is a junction that needs careful flashing. We keep a rooflight clear of that junction so each detail can be dressed on its own, and so the glass is not left in the shadow of the old gable. Kitchens also make steam, and a unit with an opening vent lets that out through the roof; our page on electric opening rooflights covers the motorised kind.
Inside, the ceiling around a new rooflight often needs re-boarding and skimming. That finish is in our quote, and we agree the colour of the lining with you before we start so the reveal is ready for paint.
Dartford's side of the job, and ours
Swanscombe falls under Dartford Borough Council for planning. An ordinary roof window on a house is usually permitted development, and the conditions are in our planning guide. Building Regulations are a separate set of checks on the structure and the energy performance of what goes in. We handle the Building Control notification where the work is notifiable, and the Building Regulations guide lists what is looked at. A new or replacement roof window must reach 1.4 W/m²K or Window Energy Rating band B.
Myth
A utility room with no outside wall cannot be given natural light.
Fact
It needs light from above, not from a wall. A small rooflight on its own roof, or a sun tunnel through the roof void, can reach a room that has solid walls all round.
On the day itself
Before the roof is opened we agree with you where the floor is covered, where the glass is stored and which rooms stay in use. The opening is made weathertight at the end of each working day, and the room below is left tidy. If a scaffold or tower is needed it appears on the quote as a line of its own. On a house with a side passage, materials go through the garden; where the garden is reached only through the house, we protect the hall and carry carefully.
Getting here from Maidstone
The town lies north-west of Maidstone by 19 road miles. One local road has had a bad spell: on 10 April 2023 part of the chalk cliff supporting Galley Hill Road (A226) collapsed and the road was closed near the former George and Dragon pub, with buses diverted via Stanhope Road, the A2 and Ebbsfleet International. For a day when glass is being delivered we check the route that morning.
The survey is free, and what follows it is a fixed written quote for the whole job, with a 10-year workmanship guarantee in writing at the end. WhatsApp us on 07880 284133 or write to info@orchardskylightsmaidstone.co.uk; the quote form reaches us too. Close by, we also work in Northfleet to the east, and in Ebbsfleet Valley and Bean to the south-west.
Box rooms, utilities and kitchen roofs
Which roof window code would fit a narrow box room?
A narrow code, chosen for the width of the room. The gap between the rafters sets the widest unit that fits without trimming them, so the loft is measured before anything is ordered. On a narrow room a single tall unit often suits better than a wide one, because it follows the line of the rafters and keeps the lining shallow.
How do you light a utility room that has no outside wall?
From the roof. Where the utility has its own low roof, a small rooflight goes directly above it. Where a loft sits over it, a sun tunnel carries a tube up through the roof void to a dome on the roof.
Who deals with the council when a roof window goes into a Swanscombe house?
We handle the Building Control notification where the work is notifiable. Planning questions go to Dartford Borough Council, and for a roof window on a house our planning guide shows whether an application is needed.
What happens if the box room roof has insulation packed between the rafters?
The insulation is cut back around the new opening and made good, and the shaft lining is insulated as well so the reveal does not become a cold spot. We look at the loft side before we quote, so the work is written into the figure. Where the loft is boarded for storage, we say at the survey which boards would have to lift.
We live near Northfleet. Do you come out as far as that?
Northfleet is about a mile and a quarter east of Swanscombe, so it is well within what we cover. Ebbsfleet Valley sits under a mile to the south-west, and Bean a little under a mile and a half.
Nearby towns to Swanscombe
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