What Does Conservatory Roof Insulation Cost in 2023? | Checkatrade
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Last updated on May 1st, 2022

Internal conservatory roof insulation cost guide

Is your conservatory leaking heat? Adding internal insulation to your conservatory roof can help to conserve heat. This means you can lower your energy bills and keep your conservatory a comfortable temperature year-round.

As heat rises, it can easily escape from a poorly insulated roof. Replacing your roof with one made from better insulated materials can fix this, but it’s expensive and disruptive. Installing insulation could be a cheaper temporary measure.

Conservatory roof insulation cost

Upgrade (typical 9m² conservatory)Low costHigh cost
Option 1. Internal roof insulation only – battens fixed to underside of existing roof, insulation added and internal roof finish applied£2,000£4,500
Option 2. New roof – new timber roof, packed with modern insulation, lightweight roof tiles, plastered internal finish£5,000£8,000

Our costs are ballpark averages – get a local tradesperson to quote now

The cost of conservatory roof insulation will depend on what you go for. There are two main options:

  1. Internal roof insulation only, with battens fixed to the underside of the existing roof, insulation added and internal roof finish applied. This will cost on average £2,000 - £4,500.
  2. A new timber roof packed with modern insulation, lightweight roof tiles and plastered finish. This will cost on average £5,000 - £8,000.

Remember that the total cost will depend on the size and pitch of the roof, and the type of ceiling (i.e. suspended, vaulted or lean-to).

For the second option, under Building Regulation guidelines all solid replacement roofs need approval from the appropriate council authorities, but planning permission should not be required. You will also need to consider:

  • Can the existing conservatory take the weight of the new roof?
  • What guarantees/warranties does the installer or company offer?
  • Will they complete all the necessary Building Regulations sign-offs? If you come to sell a property with a replacement solid roof conservatory, solicitors will almost certainly check Building Regulations approval.

Benefits of conservatory roof insulation

Insulating your conservatory ceiling can make the space more energy-efficient, thereby saving you money on your energy bills. But there are other benefits too, such as:

  • Reducing rain noise
  • improving temperature regulation – making it feel cooler in summer and warmer in winter
  • Making the conservatory feel more like a ‘real’ room.

However, conservatory roof insulation can have drawbacks if you aren’t careful. You should make sure your insulation is breathable and allows cross ventilation. Otherwise, you may face problems with a build-up of condensation. You can also install air vents for this purpose.

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Is it worth getting conservatory roof insulation, or should I just replace the roof?

Replacing your conservatory roof with better insulated materials will undoubtedly cost more, but it could potentially add more value to your home and save you more on your energy bills over time. Installing insulation is a quicker, cheaper fix that could make your conservatory more energy efficient in the short term.

What if I have a glass conservatory roof?

If your conservatory roof is made from glass panels, ordinary roof insulation isn’t a suitable option. An alternative is a solar reflective film, which reflects away some of the sun’s solar energy so that your conservatory remains at a comfortable temperature.

Do I need planning permission for installing conservatory roof insulation?

No, you shouldn’t need planning permission to install internal conservatory roof insulation, unless you’ll be making significant changes to the height/pitch/materials of the roof or the structure of the conservatory itself.

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What others think of this article:


Hi Isabel, I recommend filling in our request a quote form to get quotes from tradespeople near you.

Isabel Boyd

Look for some one to fit a solar reflective film onto a glass conservatory roof. Glasgow South area

Barry Dwane Maynard

Very helpful with our research into internal conservatory roof insulation.

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