Conservatory Roof Insulation Costs Explained: Is It Worth It?

Written by  John Davies
Last updated: July 28, 2023

Your conservatory roof needs insulation because you wish to make better use of this room which may, in the end, add more value to your property. But it’s possible that you would find yourself at a crossroads. Is it worth the investment? Will this be a project that takes up far too much of your time and money? Fortunately, there is light at the end of the tunnel without having to worry about breaking the bank or your back, for that matter.

The benefits of having an insulated conservatory roof, far outweigh the cons. It provides thermal efficiency for an all-year-round experience in a room designed for relaxing afternoon naps, tea and after-dinner drinks. It may seem like a ton of work at first, but there are methods and technology that’ll transform this ‘summer room’ into a space you may even consider to be a permanent living room in the near future.

Let’s dive right into the costs and methods you need to consider for your conservatory roof’s insulation.

Conservatory Roof Insulation Costs

Right off the bat, conservatory roof insulation that is supplied and fitted can round up between £895 and £1,850. Generally speaking, you are looking at layers of high-quality polished reflective film and of course, thermal webbing. The insulation is then covered with plaster (or UPVC finish) which helps conceal the insulation interior. So with that in mind, you should also consider the fact that costs are calculated by measuring the size and the pitch of your conservatory roof, as well as the ceiling type (suspended, lean-to or vaulted).

Should you wish not to take on the project of internal insulation, you can always opt for external insulated roof panels. But, on the flip side, this pretty much costs the same as a roof replacement which can total about £5,570.

But before we get carried away with pricing, you’ll need to understand what you can ask for when you insulate your conservatory roof.

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Methods Of Insulation

There are a number of insulation methods you may consider when you take on a conservatory roof insulation project:

Solar Control Film

This is by far the most effective method to convert your smart conservatory with insulation. Solar film is simple in a way that it allows you to spend more time in your sunroom during those cold British winters, but without costing you an arm and a leg.

Solar control films are basically just large stickers that allow for zero construction compromise. There are things you may need to consider when going the DIY route such as targeting and control of sun rays, as well as excess heat. But this is but a small task at hand when you consider the benefits you reap from the increased heat efficiency solar control films provide.

solar conservatory film

Aluminium Foil and Thermal Wadding

In some cases, you will find some contractors to favour more traditional insulating materials and methods. This combination of aluminium foil and thermal wadding is equally effective in emitting and absorbing heat. The aluminium foil acts as a heat reflector which helps with the insulation of your conservatory roof, while the thermal wadding absorbs heat with its air pockets.  Dated as this method may appear, it does prove to be practical and inexpensive.

Get a New Roof

There is a permanent solution to your conservatory roof insulation worries. It may seem drastic, but replacing your conservatory roof with something that is fully functional and that integrates with the rest of the house, will ensure climatised control all year round. This is also a way to make your conservatory feel like part of the house. Naturally, if you wish to keep that outdoor aesthetic, then this insulation method may not be the best option.

Why Should You Get Your Conservatory Roof Insulated

If you have a conservatory with no roof insulation, then chances are that you have encountered condensation and the inevitable mould patches that creep up out of nowhere. Opting for Insulation will ensure that whichever method you choose creates a barrier and keeps your house warmer in winter and cooler in the summer.

Once you’ve looked into this and found what works best for your house and your budget, you can look into other heat-efficiency improvements to make your conservatory a spot in your house you never wish to leave.

Heat Efficiency Improvements

A conservatory can be so much more than just a tea room or a quiet place in the house. To make this area of your house reach its full potential you can look into underfloor heating and air conditioning (if you don’t have central heating access). However, the best foot forward would be to opt for design solutions that are both effective and eco-friendly.

There are many ways to control heat gain on sunny days and to prevent warmth from seeping out on colder days. Thermal blinds are one way to achieve this for much less than it would cost to install underfloor heating or air conditioning.

Alternatively, you can look into heat efficiency improvements of your conservatory by avoiding due south orientation to limit solar gain. You can also look at gardening options to provide screening for a south-facing wall, for instance. There is also the question of glazing that comes to mind. Choosing energy-efficient double-glazed units fitted with solar glass will reduce solar gain and heat loss

Limiting the area of glazing to two walls rather than three and adding high levels of insulation in the floor and base walls will also help, as will choosing energy-efficient double glazed units fitted with solar glass to reduce solar gain and heat loss. This can be applied on the roof of your conservatory too, but in this case, you will have to consider a reduced glazed area to improve heat efficiency.


What’s the best way to Insulate a Conservatory?

  • Choose an effective and budget-friendly option like aluminium foil and thermal wadding.
  • Thermal blinds are known to help with conservatory insulation too.
  • Solar control film is another way to tackle roof insulation and is applied directly to your existing window panes to control excess sunlight, heat, glare and UV light.
  • Polycarbonate or glass conservatory roofs can be replaced with a modern glass alternative.

Can I insulate a conservatory roof myself

If you are considering tackling your own conservatory roof. It may be a good idea to ask a structural engineer to see if your conservatory can take the extra insulation weight. You will also have to consider ceiling battening, insulation quilt attachment, over-battening, plasterboarding and the plastering of the ceiling. This is quite the task, so be well advised that this requires a certain level of know-how.

Why should I insulate my conservatory roof?

For starters, you will have cooler summers and warmer winters to look forward to. Conservatory roof insulation also reduces the noise in bad weather and protects your furniture from the sun’s harsh UV rays.  Most importantly, you’ll be saving money because you’ll be spending less on your electricity bill.

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