A new insulated conservatory roof in Derby costs from £3,000 on a compact lean-to, while a typical spend is £3,000 to £7,500. With Derby's weather, replacing a 12 m² polycarbonate roof with our 75 mm panels holds on to roughly 1,059 kWh of heat a year, about £279 if you warm the room with an electric heater.
Derby has averaged 1,966 heating degree days a year since 2021. Multiply that by a roof's U-value and its area and you get the heat a conservatory roof throws away, which is where our numbers below come from.
The Derby climate, in four numbers
We took these averages for 2021 to 2025 from Open-Meteo's historical weather records for Derby. The warmest day in that spell hit 37.5°C on 19 July 2022. Inside a conservatory with a clear roof the air gets much hotter than that, so the room is too warm in July as well as too cold in January.
How much heat a new roof keeps in Derby
To get yearly heat loss we multiply three numbers: the roof's U-value, its area in square metres and the local degree days. Below are the results for an average 12 m² roof in Derby:
Worked out from Derby's 1,966 heating degree days (Open-Meteo, 2021 to 2025) and typical U-values.
| Roof type | U-value | kWh lost a year | Electric heater | Gas boiler |
|---|---|---|---|---|
| 16 mm polycarbonate | 2.3 | 1,302 kWh | £343 | £115 |
| Eco Tech 75 mm panels | 0.43 | 243 kWh | £64 | £22 |
| Difference | 1,059 kWh | £279 a year | £94 a year |
Energy costs use the Ofgem cap for 1 October to 31 December 2026. If the conservatory is never heated, the gain shows up as comfort rather than a lower bill: the room simply stays nearer to the rest of the house. Put in your own measurements with our roof price and heat loss calculator and choose Derby from the town list.
Eco Tech prices for Derby
We charge the same across the East Midlands. What you pay includes taking your old roof away, bespoke panels in the shade you pick, the fitting itself and a 10 year HomePro insurance backed warranty.
| Style | Small (0 to 12 m²) | Medium (12 to 25 m²) | Large (25 m² and over) |
|---|---|---|---|
| Lean-to | £3,000 to £3,550 | £3,950 to £4,700 | £5,450 to £6,450 |
| Edwardian | £3,200 to £3,800 | £4,200 to £4,950 | £5,800 to £6,850 |
| Victorian | £3,300 to £3,900 | £4,350 to £5,150 | £6,000 to £7,100 |
| Gable end | £3,350 to £4,000 | £4,450 to £5,250 | £6,100 to £7,250 |
| P-Shape | £3,500 to £4,150 | £4,600 to £5,450 | £6,300 to £7,500 |
Our roof panel price guide explains what moves the figure up or down, and the insulated roof panel page shows how each panel is built.
What happens after you call us
- Photos and a survey. Send us a few photos and rough sizes, then a surveyor visits your Derby home to measure up, check the frame and bars, and show you colours and roof lights.
- A price in writing. You receive a fixed written quote. Finance through Kanda is available, subject to status.
- Fitting day. Our team removes the old roof and fits the panels, usually in one day, keeping the room covered and tidy throughout.
- Warranty. Your 10 year HomePro insurance backed warranty is registered once the roof is finished.
Derby questions, answered
What does a new conservatory roof cost in Derby?
Most of our Derby customers pay between £3,000 and £7,500. A medium Edwardian of around 17 m² usually comes to £4,200 to £4,950 with the old roof removed, the panels fitted and the 10 year HomePro warranty included. Your survey fixes the price in writing.
How much heat escapes through a conservatory roof in Derby?
On 1,966 degree days a year, a heated 12 m² roof in 16 mm polycarbonate loses around 1,302 kWh. Put 75 mm Eco Tech panels on the same frame and that drops to about 243 kWh.
Will I need planning permission in Derby?
Normally no, because the conservatory keeps its footprint and height. Listed homes, conservation areas and properties with permitted development rights removed should check with the council before work starts.
How quickly can Eco Tech fit a roof in Derby?
Derby is about 36 miles from our Coventry head office, so surveys are easy to book. Most roofs go on a few weeks after the survey, and a typical roof is finished in one day.