Otterbourne
Where does a rooflight do the most work in a village of tile, brick and deep gardens?
Otterbourne sits between Eastleigh and Winchester, and its houses are being extended into their gardens more often than lifted into their roofs
Otterbourne is a village in the Itchen valley, in the district run from Winchester but a short drive from the edge of Eastleigh. Its housing was not built in one go. There are older cottages and brick houses near the village's oldest roads, interwar and post-war semis and bungalows laid out along them, and larger detached houses set back on deep plots. The result is a place where almost every rooflight job starts from a different roof, and where a surveyor spends more time reading the house than reading a catalogue.
Distance is no obstacle. Otterbourne lies to the north-east, 8.2 road miles on from Southampton, so we can come back for a second look at the roof when the builder has opened it up, and that matters on older houses where nothing is quite as drawn. A visit costs the job very little time, and it prevents a wrongly sized opening being built.
Cottages and brick houses near the old roads
The oldest houses in the village have clay tile or slate roofs, many with a steep pitch and small rooms in the roof space. Rafters in these buildings are seldom evenly spaced. A window position that looks simple from the landing may land on a rafter, a collar or a stack, so we mark the opening from inside, then from the roof slope, and give the builder the finished size for the unit being fitted before a tile is lifted.
Insulation is the other half of an old roof. Between old rafters the depth for it is limited, and the reveal around a new opening is where heat is most easily lost. We talk with your builder about how the lining of the opening will be insulated and finished, so the window is not framed by a cold, damp-prone edge once the plaster is on.
On a cottage the look of the roof counts as much as the light. A slim unit with a narrow frame and one central bar sits down into old tile or slate and keeps the slope calm. A standard roof window sits slightly proud of the covering, which suits a plain modern roof better than a mellow clay one. Where a house is listed or in a protected setting, the council has a say in that choice, and we look before we recommend anything.
Tile matters in a practical sense too. Handmade clay tiles are often brittle with age, and lifting them around a new opening can break several. Your roofer should have spare tiles, or matching reclaimed ones, ready before work starts. We flag that in the quote so it does not turn into a surprise on the scaffold.
Interwar semis and the loft above the landing
Between the wars and just after, houses went up in pairs and short terraces with hipped or gabled tile roofs. These roofs have a generous volume, and many of the lofts above them are used for storage, with a fixed ladder and a single bulb. Turning one into a bedroom or a study means roof windows, and the question is how many. One large window in the middle of the slope may serve a study. A bedroom with a bed against the eaves normally wants two, so light and a view both reach the floor.
Some owners combine the two ideas: a dormer at the back for headroom and a pair of roof windows at the front. The rear dormer takes the stairs and the bed, the front slope takes the light for the landing or dressing area, and the roof windows there are chosen to keep the street elevation neat. The sequence matters, because the dormer's structure fixes where the front openings can fall.
Hips matter more here than people expect. A hipped roof has less clear slope than a gable of the same house, and a window too near the hip rafter leaves no room for the flashing to lap properly. We check clear slope on the day, and a short move along the roof is easier to make on paper than on the rafters. Escape from an upper-floor loft room has rules of its own, set out under Approved Document B, so if the room will be slept in your builder should speak to us and the building control approver about the window early.
Bungalows that have been extended twice
Bungalows in the village are often more than the single storey they started as. A garage has been absorbed into the house, a rear room added, a porch glazed in. Every extension adds a roof, and the oldest ones tend to be flat roofs with felt or a more recent single-ply membrane, with a clouded plastic dome or no daylight at all. The inner rooms in an extended bungalow are the ones that never see the sun, and a flat rooflight or a sun tunnel over a corridor, utility room or bathroom changes how the middle of the house feels.
Corridors and bathrooms are the usual candidates. Natural light in a corridor makes a bungalow feel larger, and a bathroom with daylight needs less electric light through the day. If the bathroom gets steamy, an opening rooflight placed near the shower helps move warm moist air out alongside the extractor.
A sun tunnel is a good match for a room that only needs daylight. It uses a rooftop dome, a reflective tube and a ceiling diffuser, and it threads between rafters or joists without removing them. A flat rooflight, by contrast, needs a kerb and a proper opening, and that is where the covering and the upstand height need to be agreed with whoever is laying the roof.
Large detached houses and the garden room
Larger detached houses on deep plots make up a good part of Otterbourne's character, and they generate a different kind of job. A rear extension with bi-fold or sliding doors, a kitchen that runs the full width of the back, a garden room or a pool house: these are the places for roof lanterns and large flat rooflights. The glass is substantial, the room beneath is tall enough to take it, and the garden gives plenty of space to land a crane or a lifting rig.
The risks are the usual ones. A big unit weighs a good deal, so the structure beneath needs to be sized to carry it. The kerb is built by the carpenter or roofer to a size we supply, and it must be level, square and the right height for the membrane to be dressed over it. A rooflight that is a few millimetres out on a kerb is a rooflight that never sits quite right, so we check dimensions on the deck before ordering rather than relying on the drawing alone.
Where an extension is designed by an architect, we ask for the structural drawing as well as the plan. The two sometimes disagree by a few centimetres, and the rooflight is the item that shows it.
Trees are part of the picture here. Where mature trees overhang a garden, glass under heavy cover collects leaves, bird droppings and a green film. A self-cleaning coating helps on glass that gets rain, and we say plainly where it will do little. The easier answer is to place a rooflight so it can be reached from the ground or from a ladder at the eaves. On a flat roof that overhangs a lawn or border, an upstand of reasonable height also stops soil, leaves and water splashing back onto the seal, and keeps the glass easier to wipe clean.
How a builder's calendar shapes the order
Rooflights are made to measure and the maker decides how long each takes, so the sensible time to talk is when drawings are nearly final or as soon as a builder names a start. We take the date the roof must be weathertight and plan the order backwards from it, so the glass has not been sitting in a van while the carpenter waits and has not arrived after the felt is down.
Once the order is in, you and your builder each get a delivery day from us. On site, the roofer comes first with membrane or covering, the electrician follows for any electric opening unit, and the plasterer returns last to finish the reveals. That order means nobody has to knock back finished work to fit a unit.
What Winchester decides, and what we check
Planning in Otterbourne is dealt with by Winchester City Council, even though the village sits right beside the edge of Eastleigh borough. Many rooflights on ordinary houses are permitted development, a route our planning guide for rooflights sets out in full, including how it can be removed. Before any order goes in we research the property, tell you what the record shows and what you may need to ask, and the council makes the call. You can look up any address yourself on the Winchester City Council site.
Building Regulations apply separately. Each rooflight we put in is fitted to current Building Regulations. Where a job is notifiable, Building Control hears about it from us. Our fitting is backed by a 10-year guarantee.
Otterbourne is 8.2 road miles north-east of our base in Southampton, near enough for a pre-order visit and a second check once the roof is open.
