Darenth skylights and rooflights

The hallway with doors on every side

A hall that runs through the middle of a house has a front door at one end, a kitchen door at the other, and a lounge and dining room off the sides. No outside wall touches it. A glazed panel in the front door gives the first couple of metres a glow, and everything beyond that depends on light leaking round open doors.

If there is a loft over the hall, there are two ways up to the sky. A roof window on the slope above the landing lights the stairwell and spills down into the hall. Where the roof space is deep or the slope faces the wrong way, a sun tunnel runs a reflective tube from a small dome on the tiles to a diffuser in the hall ceiling. We choose between the two by looking at the rafters and the insulation, which is the reason a survey includes a climb into the roof space. A long tube carries less daylight to the diffuser than a short one, so the run is measured before a tunnel is suggested.

The landing upstairs is the same story from above. It sits between bedrooms, with a bathroom door on one side and a stair opening on the other, and the only brightness comes through whichever doors are standing open. A roof window over the landing lights the stair well and the hall in one go.

The utility room that came later

Utility rooms are often built into the back of a garage or a kitchen extension. They usually get one window, sometimes set high for privacy, and a door. When the extension has a flat roof, the answer is direct: a flat rooflight over the working end of the room, where the washing machine door swings and the worktop sits. In Building Regulations terms it is a rooflight, a glazed unit on a kerb or upstand, and it can be fixed or opening if you want the steam to leave. It also lights the worktop directly, which a window in the end wall never reaches. Our flat roof rooflight page shows the range.

Garden rooms and the dim back wall

A garden room often has big glazed doors at the front, a plain back wall and a roof of felt or sheet material. Sit at the back in the afternoon and the room feels like a cupboard with a view. A rooflight over the rear half of the ceiling, or a small lantern if the room is tall enough, puts daylight where the doors cannot send it. A lantern gives more height inside, while a flat rooflight keeps the roofline low. Since a lantern usually stands more than 150 mm proud of the roof, it normally falls outside Class C, and an application is the usual route. The lantern planning guide has the detail.

Pitched, hipped or flat: what each allows

The roof over the dark room sets the menu. A pitched or hipped slope takes a roof window that lies in the plane of the tiles; the manufacturer's size codes tell you its shape, and in a code such as MK04 the letters give the width and the digits the height. A flat roof takes a rooflight on a kerb, which can be a plain pane, an opening unit or a lantern. A room under a loft with no usable space takes a sun tunnel. The pitch, the covering and the rafter spacing narrow the list further, and we confirm it with a tape rather than from a photograph.

Aspect matters for what you feel inside. Glass on a south-facing slope brings in strong sun in summer, so we talk through blinds and glass options for a room such as a hall or study, whereas north-facing glass gives a steady, even light all year. A blind fitted to the frame deals with bright summer afternoons, and the glass is chosen for the aspect of the room.

What Dartford Borough Council looks at

Darenth falls under Dartford Borough Council for planning. Roof windows and flat rooflights on a house are usually permitted development, meaning no application is made, when they meet the Class C conditions on projection, height and side-facing slopes and the house still holds its rights. Flats, houses created under change-of-use permitted development and houses whose rights were removed by a planning condition are the exceptions, and the full list sits in our planning permission guide.

Building Control for a new opening

Cutting a hole in a roof is building work. The cut rafters or joists have to be carried by new framing, the glass has to meet an energy limit, and a loft room can bring fire and escape questions. The limit depends on the product: a roof window is held to 1.4 W/m²K or a Window Energy Rating of band B at minimum, while a rooflight or lantern is held to 2.2 W/m²K. The Building Regulations guide explains each point, and the local authority or a registered building control approver signs the work off.

What moves the cost

Several things change what a job costs: the size of the opening, whether the roof structure has to be trimmed and strengthened, the covering you have, how deep the lining is between roof and ceiling, how easily materials reach the roof and which glass you choose. A hallway sun tunnel and a utility room rooflight sit at very different points on that list, which is why we measure before we write a figure.

What the visit settles, room by room

For a hallway we measure the depth of the loft, the spacing of the rafters and the height of the ceiling, because those set whether a roof window lining or a sun tunnel tube has a clear run. For a utility room we read the fall of the flat roof, the deck beneath the covering and the height an upstand needs to reach. For a garden room we look at the span, the covering and what the walls can carry. We also ask what the garden room roof is made of, since felt over boards and sheet material each need a different upstand detail. Each of those readings goes onto the quote, so the figure matches the roof you actually have.

Opening or fixed, and the glare question

A fixed pane is simple and weathertight. An opening unit lets steam and cooking air out of a utility room, and electric versions on a rain sensor are covered on our electric opening rooflights page. Glare is the other thing to settle early. A hall or study under a south-facing slope may want a blind or a tinted pane; a garden room used in the evening may want neither. Say how you use the room and we will suggest the glass to match.

From first message to finished ceiling

Message us your postcode and we arrange the visit. The quote that follows is a fixed, written figure, and it names the unit, the glazing, the roof work and the finish indoors. A 10-year workmanship guarantee comes with the job, in writing.

Nearby, our list also takes in South Darenth, Bean and Hawley. WhatsApp on 07880 284133 is the quickest way to reach us; the quote form and info@orchardskylightsmaidstone.co.uk work too.