Most asked questions from Conservatory and Orangery Owners!

How to keep my conservatory cool in the summer?

The most cost effective way to keep new or old conservatories cooler is using architectural glass coatings or window film more powerful than current specified solar glass being able to reduce temperatures by up to 15°C* with no running costs and retaining a clear view. We have customers contact us within weeks of their brand new conservatory being erected even ones using the latest solar glass. (*figure taken from customers written feedback form)

How to keep my conservatory warm in winter?

Our Low E winter heat retaining glass coatings are able to retain heat actively although our customers tell us our summer heat reflecting films also retain heat for longer too making it more comfortable.

How can I stop the glare in my conservatory?

More glass means more light, simply by having a slight tint seen on most solar glass simply isn’t enough to reduce the glare from the sun. Our glass coatings can be tailored to your needs and can block up to 95% of the light which sounds a lot but you don’t wear sunglasses with a slight tint!

And more recently: Do I need to get a new roof conversion for my conservatory, is that my only option?

No, solar control glass coatings can make your conservatories more usable while being the only product that retains a clear view out and without replacing ANYTHING.

Mr & Mrs Snelling from Louth were on the verge of pulling down their polycarbonate roofed conservatory after receiving quotes for roof conversions which were not cost effective and the ageing vertical blinds offered no relief and cluttered the space. CoolGlass coated the roof and the windows as well as a garage window and two front bed rooms….these are their words from the survey form returned from them.

“A thoroughly professional service. From the start when Mark gave us his knowledge and guidance as to what film would suit our purposes best, to the installation with his colleague Adam. They were punctual, skilled and tidy. We are delighted with the end results. There has been a noticeable reduction in heat and glare in the conservatory and garage and the privacy we now have in our front bedrooms has enabled us to remove the vertical blinds making the room feel so much larger. 

We would not hesitate to recommend Mark and CoolGlass to anyone thinking of installing window film. 

We wished we had known about this product sooner.

Thank you Mark & Adam

 Gerry and Rita Snelling 

Conservatories are great addition to any home offering an additional room in a cost effective way. People also want to have a link to the outside world which they can use all year round sadly this is often not the case because of the nature of the beast, its predominately glazing.

CoolGlass has solutions for your conservatory or orangery against problems such as over heating, winter heat loss, annoying glare, expensive fading, privacy, skin protection, safety and security for a fraction of the cost of made to measure blinds or expensive roof conversions which rob joining rooms of natural light. Our products are the cheapest and highest performer pound for pound and the only one which will retain the conservatory as it was originally intended and it utilises your existing windows and frames so you won’t be contributing to land fill as the old glass is deemed to be contaminated and often isn’t recycled.

Example costs* for a sized as conservatory pictured below

  1. Solar control window films installed to the roof AND windows £800 – £1600+
  2. Pleated blinds fitted to the windows and roof £2000 – £6000+
  3. Roof conversions £4000 – £8000+
*prices are estimated and depends on quality and specifications chosen

For the cost of a roof conversion we could probably install high performance glazing coatings to the roof AND windows AND install brand new blinds to the windows and you’d still saved enough for a weekend away.


A conservatory installed with a neutral window film on the windows and the specialist `m Metalux Plus on the polycarbonate roof.

A conservatory installed with a neutral window film on the windows and the specialist `
Metalux Plus on the polycarbonate roof.


A glass roofed conservatory previously fitted with roof blinds is now enjoying a new lease of life as the space was originally intended….a connection to the outside world

Sunrooms tend to overheat and suffer from excessive glare and the expensive wicker and rattan furnishings fades at a rapid rate due to the high levels of UVA & UVB passing through the glass. There is also the danger of skin cancer if prolonged usage occurs.

I have sadly met so many people who are desperate to use their sunroom but sadly are unable after trying different methods of shading themselves. We’ve have seen patio umbrellas, and umbrellas and peaked caps next to each chair for each person to use and various fabric materials hanging from the roof which catch dust and insects; but the worst and most desperate person painted the roof with emulsion which then went mouldy effectively ruining their conservatory. Our customers have found that their conservatories with blinds and air conditioning are also struggling to be usable plus the running costs of A/C systems are very expensive and pump out CO2 and often can’t cope.

Also why have a room which is mainly glazing for the sole reason to connect with the outside then cover the windows with blinds or a solid roof?

This film is fitted with winter heat retaining summer heat reflecting films showing how no view is lost by installing films

This film is fitted with winter heat retaining summer heat reflecting films showing how no view is lost by installing films


This conservatory owner had spend over £10,000 on these blinds and it was still too warm to use, suffered from lots of glare from the light fabric and had debris falling from the over head blinds onto them and trapped insects which was irritating.


Now with roof blinds discarded glare is reduced by 80% and they can now see the sky. The customer recorded a temperature reduction of 10 – 15°C compared to the pleated roof blinds which had a solar reflective coating but just couldn’t cope with the level of suns energy that a film can.

Using blinds as a window dressing or privacy at night is fantastic but they are not the right product for a conservatory to control the suns energy.

Now the good news there is a product which can turn this often unusable space into the haven you always hoped for with no running costs and a life span of up to 25 years and costs less than quality blinds to have installed…it’s a window film.
Solar Control Window Films or glass coatings do like it says on the tin, it controls the amount of solar energy passing through your glazing to a level you want. There are different colours and shades available to tailor it for your needs what ever your particular problem whether it’s Glare, Heat gain or Fading even privacy. There are even window films now which are designed to retain the heat in the winter as well as control the sun in summer reducing heat loss through your glazing by as much as 41% single glazing and 17% on double glazing so in a room which is predominately glass you really do feel a difference in the space and your bank balance.

More conservatories which are now part of the home structure where they are used to link two rooms together or as a fully functioning kitchen, living space or office so they are more than an occasional room.

There are films for polycarbonate roofed conservatories as well as glass; a special film must be used due to a reaction between a normal window film and the plastics would cause an incorrectly specified film to lift over time.

Métaux plus polycarbonate solar control film showing glare reducing properties

Métaux plus polycarbonate solar control film showing glare reducing properties

There is also some science in choosing the right window film so before you rush off to the local DIY or motor factor as stick “a film” on your windows you are at risk of damaging or worst case breaking your glass completely. Solar window films absorb and reflect solar energy as they work and it’s the absorption which can thermally stress your glazing causing the double glazing to fail and condense up or stress the glass so much it can break it. This is where you need to call the experts who will test your glass and advise you on the best film for your needs but also the ones which won’t harm your glazing. The installations carry comprehensive manufacturer backed warranties of up to 16yrs but it’s very very rare that you will ever have any issue if professionally installed.

Window films have no maintenance or running costs and can last for quarter of a century in certain situations they have also been proven to be one of the fasted paying back home improvement products you can have fitted to a property with certain films also have been proven to be carbon negative so for the people who have environmental concerns it means they actually save more CO2 that it actually took to manufacture and install them. Our window films have an SPF of 285+ and blocks 99% of harmful UVA & UVB to protect the user and have been approved by the Skin Cancer Foundation they will reduce the fading of furnishings by a minimum of 40%.


The suns damage to furnishings. Most glass even the solar reflect glass doesn’t block all UV unlike window films

Window films are not a new fad they have been produced and developed in the early 1960’s and are used regularly in the USA, Asia and Australasia and we have a lot of happy customers who don’t know how they ever lived without them. If it can cope with the Florida heat and reduce temperatures in sky scrapers is can transform even a south facing conservatory.

What’s the down sides? There aren’t many but one is that although they offer extra privacy during the day but at night they offer none so a traditional window covering would be need if you require that. You have also to be aware that adjoining rooms light levels maybe reduced but no where as near as the new solid roof conversations which are being heavily publicised.  We would advise customers of that and help them choose a film which wouldn’t impact too heavily.

The alternative is solar blinds although not as effective as a film it’s the next best option. The foil blinds which can offer a clear or semi clear view out but you wouldn’t have night time privacy using them and would only be offered where flexibility is required but they do have an industrial look not always suited in a domestic environment.


Frequently asked questions?

Can window film be installed on to already tinted solar glass?

Yes it can and it will retain the blue colouring enhancing it making it more vibrant. It will effectively turbocharge it. Our glass survey and test will highlight issues here but you may be asked for the comprehensive glass specifications occasionally if on obscure glass has been installed so our computer modelling for the glass risk assessments is accurate. This is free of charge and part of our service.

Can it be used with existing blinds?

Yes it can when is comes to the windows but the roof blinds need to be removed to install the films and we haven’t had customer who ever wants them refitting due to the extra dust and insects they collect. Window film doesn’t create additional surfaces like blinds to collect dirt.

Can we contact CoolGlass to advise us on the best way to go regarding a new conservatory?

Yes you can because we are problem solvers we will give you impartial and ethical advice on the best way forward for your individual needs and we can even recommend trusted companies to carry out the work for you using our recommendations.

Are the films fitted internally?

90% of the time yes as it gives much better durability (up to 25 years) but sometimes due to the type of glass or access reasons external films are used but they will still give you 10 years good service.

Is there a special way to clean film?

Not really we recommend using just water and a Streak free cloth but a traditional squeegee or soft brush using pure water is suitable. You will be given a comprehensive after care leaflet with the do’s and don’ts and all the frequently asked questions about the application often a the time of ordering so you know in advance what to expect immediately after the installation.

Will they stop the gold fish bowl effect and give me privacy?

Yes it can and if that is priority to you we can adjust which film is going to give you more privacy but this would be discussed during every survey and consultation.

Are the films a CoolGlass Product?

CoolGlass is a Solargard dealer which is part of the Saint-Gobain Performance Plastics Division. Saint-Gobain is a global company over 350 years old and have been making glass for decades and we are proud to be part of the dealer network. We are transparent about the products we use which have had their performance figures independently verified so you are getting what the spec sheets says. Where Solargard don’t offer a product we need we deal with another companies Solarscreen or 3M which have excellent standards and we deal directly with the manufacturers not distributors in most cases.

What is the warranty on the films and how long will they last?

Our internally fitted solar control films have between 12 – 16 years warranty with the poly carbonate film being 5 years. External films range from 3 – 7 year warranties depending on products and internal films are expected to last a minimum of 15 years but can achieve 25 years and still be serviceable while external films can last 5 – 10 years depending on how they have been maintained and their situation.

If you have a question contact us today.