Conservatory roof replacement cost: Eco Tech insulated panel prices

Panel roof prices by roof size

Our prices follow the roof area rather than the floor area, since the roof is the part we build and install. Nearly every conservatory we visit falls into one of the three bands below, and every figure is fitted with the old roof cleared away.

Small covers roofs up to 12 m², which takes in most lean-tos and smaller Edwardians. Medium means 12 to 25 m², home to most Victorians and the bigger Edwardians. Large starts at 25 m², and that is where you tend to find P-shapes and broad gable ends.

Expect the roof to measure slightly more than the floor, because it slopes and hangs over the frame. A 3 m by 3 m floor normally carries just over 9 m² of roof, which keeps it inside the small band.

What each style costs

Each extra facet on a roof means more cutting, more hip bars and more joints to seal, so shape moves the price. A lean-to has the plainest layout and costs least per m². Measured against a lean-to with the same roof area, an Edwardian comes in around 6% higher and a Victorian around 10% higher.

Gable ends run about 12% above a lean-to, as the upright triangle at the front has trims of its own. P-shapes sit roughly 16% higher, because two roofs meet at a valley and there are more junctions to seal than on any other layout.

Treat each row as a starting figure for a typical size of that style. Since your quote comes from your own measurements, it may sit a little above or below the row that matches you. Every style has a page of its own too, such as our Victorian conservatory roof page.

Everything the price covers

Each Eco Tech quote is a fitted price, and once written it is fixed. You will not find extra charges for the survey or for taking away waste.

• Survey visit, free: we measure the roof, look over the frame and roof bars, and take photographs that our panel makers work from.
• Old roof removed: the polycarbonate or glass comes down, goes on our van and is recycled.
• Panels made for your roof: UK made 75 mm insulated aluminium panels, coloured to your choice outside, white inside.
• Installation: panels fixed and sealed into the frame you already have, with fresh trims and flashing along the house wall.
• Tidying: dust sheets laid first, then everything swept, vacuumed and removed at the end.
• Cover: the HomePro 10 year insurance backed warranty on the panels and our workmanship.

Optional extras and their prices

The majority of roofs need no extras at all. These three are the add-ons customers ask about most, and each one costs the same however large your roof is.

One or two roof lights is the usual choice. A single one tends to be enough on a small lean-to, whereas big Victorians and P-shapes often take two to spread the light more evenly. Sizes and positions are on our roof lights and spotlights page.

Six things that move your quote

Two conservatories with matching floor sizes can still be priced quite differently. These six factors explain the gap, listed roughly from the biggest effect to the smallest.

Style

The style gives us the base figure, as the table above shows. A lean-to is one plain slope with hardly any joins. A P-shape, by contrast, has a pair of roofs, a valley and many more edges. More junctions mean a longer fit and more seals and trims.

Size

A larger roof costs more overall but tends to cost less per m², since the time spent setting up, stripping and tidying is spread across extra panels. That explains why big roofs can come in near £250 per m² and very small ones nearer £450.

Access

Scaffolding is not needed on most single storey conservatory roofs. Difficult access adds a little, such as a roof we can only reach down a tight side passage, one above a sharp drop, or one that can only be reached from next door's garden. The surveyor notes this on the visit and it appears in your quote.

Frame repairs

The panels are light enough for most uPVC and aluminium frames. If we spot a cracked roof bar, a dipping ridge or a shifted dwarf wall, it must be fixed before the new roof is fitted. Repairs are listed as their own line, so you see the cost before agreeing to anything.

Now and then a frame is in no state to carry any new roof. The right fix then is a full replacement roof with a new frame, which Eco Tech does not offer, and we will say so on the survey visit rather than fit panels that would soon fail. Our guide is my conservatory frame strong enough sets out what we inspect.

Colour

Outside, anthracite grey and white are chosen most often, and the ceiling side is white on every roof. Any RAL colour is possible, and the quote will show whether your choice affects the price. Show us any samples you like on the survey day and we can match them.

Finance

Paying in one go is not the only route. You can spread the cost with finance through Kanda, subject to status, and the total roof price stays exactly as quoted.

How panels stack up against polycarbonate, glass and lining

This is how the four usual routes compare on a conservatory with a 3 m by 3 m floor. The U-value tells you how quickly heat leaves through the roof, so the smaller the number, the better.

Polycarbonate is the lowest cost roof to put on, yet 16 mm sheets let heat out roughly five times faster than our 75 mm panels. It really only works for a room you use in the milder months. Our page on polycarbonate conservatory roof replacement looks at that decision in more depth.

Low-e glass is a genuine step up from glass fitted before 2002, which sits around 2.8, and you keep your view of the sky. Over the same area it normally costs more than panels, and it will not stop the room climbing to 35 to 40°C on a bright July day.

Lining the inside is the cheapest way to take the chill off, but it covers up the old roof instead of removing it. Tired sheets and broken seals stay overhead, and if the work is rushed, warm damp air can find its way up to the chilly old covering and form condensation in the void. See insulating a conservatory roof for a direct comparison.

A worked example of running cost savings

To find roof heat loss, multiply the U-value by the area and by the temperature gap. Picture a 12 m² roof with the room at 20°C and 0°C outdoors. In 16 mm polycarbonate at 2.3, about 552 W escapes, much the same as a small electric heater puts out. Swap in our panels at 0.43 and the loss drops to about 103 W.

For a full year, heating degree days replace the temperature gap. England sees about 2,150 a year, measured from a base of 15.5°C, and multiplying U by area by degree days by 24, then dividing by 1,000, gives kWh. The costs below use the Ofgem cap running from October to the end of December 2026, which is 26.32p per kWh for electricity and 7.97p per kWh for gas.

Compared with 16 mm polycarbonate, panels keep in roughly 1,158 kWh a year, about £305 for a room warmed by an electric heater or about £92 on gas. Compared with 25 mm polycarbonate, the gap is about 725 kWh, so £191 on electric or £58 on gas.

The sums assume you heat the room right through the cold months. Warm it only at weekends and you save less; use it as a home office heated every weekday and you will be close to the full amount.

Counting energy alone, a £3,000 roof in an electrically heated room covers its cost in about 10 years when it replaces 16 mm polycarbonate. Payback is rarely the reason people buy, though. They want a room they can sit in during January and still bear in August. For more examples, read our guide to conservatory heating costs.

Getting a fixed price from us

The calculator further down gives a guide figure in less than a minute, built on the same rates our surveyors use. Here is how that becomes a fixed written price.

1. Choose your style and approximate size in the calculator, or fill in the short free quote form.
2. Send us your measurements and a few photos of the roof, one from outside and one from inside, along with your postcode.
3. Book the free survey visit. It lasts about an hour while we measure, check the frame and answer whatever you want to ask.
4. Get your fixed written quote with every item and extra listed, frame repairs included.

No deposit is ever taken before the survey, and your quote is not a same day offer. Compare it with other firms at your own pace and ask Eco Tech about anything you are unsure of.