Warmlid

Roof shapes

Victorian conservatory roof replacement

A Victorian conservatory roof replacement is priced about 10% above a lean-to of equal size, which gives guide prices from £3,300 for a small room, £4,400 for medium and £5,500 for large. The reason is the bay. Its roof is made of wedge shaped faces meeting at a hub, and every one of those panels is cut to its own angle. The bay also points glass at the sun from early morning to early evening, which is why Victorians under clear roofs are so often the hottest rooms in the house.

White panel lean-to roof under a stormy sky

How to spot a Victorian

Look at the front. A Victorian has a rounded bay made of flat glass facets, usually three or five, rather than one straight face. The back half of the room is often rectangular, so the plan looks like a square with one end bent into a curve.

The roof follows the floor. A ridge leaves the house wall, heads for the garden and stops at a hub above the bay. From the hub, bars fan out to each corner of the bay like the spokes of half an umbrella. Plenty of them still wear their original frilly cresting, with a spiky finial crowning the hub. If the front is flat with square corners, it is an Edwardian instead; see the Edwardian roof page.

Victorian conservatory with a polycarbonate roof on an overcast day
A Victorian bay roof before the swap.

The hub, the ridge and the wedges

The hub is the round fitting where the bay bars meet. It carries a lot of the roof, so it is the first thing checked once the old sheets are off. The ridge joins the hub to the house wall and is checked along its length.

Each bay face is a wedge, wide at the gutter and narrow at the hub, so its panel is cut to that exact wedge on the day. The back slopes either side of the ridge are ordinary rectangles. Every joint is sealed before its cap goes on, and a new flashing is sealed into the house wall.

A Victorian panel roof, in order

  1. Open the roofOld sheets and caps off, the frame open to the sky for a few hours.
  2. Check the hub and ridgeThe two parts that carry the bay are checked for movement and corrosion.
  3. Back slopes firstStraight panels from ridge to gutter, sealed along the bars.
  4. Bay wedgesEach facet gets its own angled panel, fitted from the gutter up to the hub.
  5. Cap and finishNew hub cap, ridge cap, trims and gutters, with the cresting refitted if it is sound.

Typical sizes and guide prices

Victorians are most often medium sized, around 3.5 m to 4 m across. The five facet versions tend to be larger and cost a little more within their band because of the extra wedges.

All figures include fitting and taking away the old roof, before extras such as a roof light or LED spotlights. You get a fixed, written price after a free survey; see how the guide prices are worked out.

Victorian guide prices, fitted, before extras (lean-to price plus about 10%)
Floor area Example Guide price from
Small up to 12 m² 3 m wide, three facets £3,300
Medium 12 to 25 m² 4 m wide, three or five facets £4,400
Large over 25 m² 5 m wide, five facets £5,500

Why the bay is a sun trap

A flat front faces one direction. A bay faces several. On a south facing Victorian, the left facets catch the morning sun, the middle ones take midday and the right ones pick up the late afternoon, and the roof wedges above them do the same from a higher angle. There is almost no hour of a sunny day when part of the roof is not square on to the sun.

The bay is also where the chairs go, right under the hub, which is where hot air collects. That makes the numbers below feel even worse than they read. In our model the typical room passes 30°C for 556 waking hours a year under polycarbonate and 714 under glass, against 34 under panels. Your own town is in the Comfort Calendar.

Waking hours a year above 30°C
  • Glass roof714 hours
  • Polycarbonate roof556 hours
  • Panel roof34 hours

Comfort Calendar model, 104 towns, 2024 and 2025 weather

The finished ceiling

Inside, the bay keeps its shape. The ceiling rises in clean white wedges to the hub, which makes a natural spot for a pendant or a chandelier, and LED spotlights can go along the ridge. Outside, white is most common on Victorians, with light grey and anthracite grey close behind; you can see the range on colours and finishes.

BeforeVictorian conservatory roof stripped open during fitting
AfterVictorian panel ceiling with a chandelier fitting
The bay open to the sky mid fitting, then the finished ceiling with a light at the hub.

Honest limits

Five glass facets are still five glass facets. They let in low sun, warm the bay on bright afternoons and lose heat in winter, which is why the winter heating saving in our model is 15% and not more. If your Victorian sits on a stone house or carries heavy cresting, we check the wall and the hub carefully at the survey. When you are ready, start your quote.

Victorian conservatory with a white panel roof in sunshine
A Victorian bay with its new panel roof.

Questions people ask

Is a three facet or five facet Victorian more expensive?

Five facets take a little longer and use more angled panels, so within the same size band they cost a little more. The survey gives you the exact figure.

Can the cresting and finial be kept?

Often, yes. If they are sound they can go back on the new ridge and hub caps. If they are brittle, plain caps look tidy too.

Where is the best place for a roof light on a Victorian?

On one of the back slopes, away from the bay. It lights the middle of the room without adding sun to the seating area at the front.

Keep reading

Ready to stop guessing?

Answer a few quick questions about your conservatory and get a guide price on screen. A surveyor then measures up and fixes it in writing.