Conservatory Too Hot and Too Cold



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Historically conservatories were built with occasional use in mind when weather conditions permitted. In more recent times conservatories have proved a very useful and welcome addition to homes to provide additional living space to be used as living or dining rooms, sun/garden rooms, somewhere for the children to play or teenagers to hang out. A real multi-purpose room.

The vast majority of conservatories, by their nature and materials used in the roof are poorly insulated, meaning that for many months of the year they are unusable because of excessive heat in warmer weather and being to cold and unusable in the colder months, and there are plenty of those in the UK.

Almost all conservatory roofs are glazed with either polycarbonate sheeting or sealed double glazed units with poor insulating qualities leading to the all too familiar “Too hot and “Too cold” issues

Polycarbonate is a lightweight sheet material that will keep the rain out (although very noisy even with light rainfall) but little else due to its poor insulating properties. Heat will come through very easily and polycarbonate offers no protection at all from solar gain meaning in warmer months the conservatory becomes unbearably hot and totally unusable for the most part of the day. In colder weather, probably as much as 80% of heat generated inside the conservatory is lost almost immediately through the roof as polycarbonate is not insulating enough to retain any of the heat so homeowners find themselves having the heating in the conservatory on a high setting to retain an ambient temperature, but when the heating is turned off, the conservatory cools down very rapidly as there is very little to stop the heat escaping through the roof.

There are several glass roof options available these days, some with ‘solar reflective’ properties that claim to block out up to 70% of the suns energy (at least 30% will still enter the conservatory so the conservatory will still heat up but will just take a little longer to do so) There are also Self-Cleaning glass units that are used to aid the cleaning of the roof externally, but these offer very little by the way of protection from the heat.

In the cold weather, glass is also a poor insulating material as far as heat retention is concerned. Most glazed units have an inner pane of a ‘Low Emissivity’ coating that is designed to reflect heat back into the conservatory but this property has a very low and limited effect regarding heat retention, nothing like an insulated panel would produce.

Most, if not all conservatories that have either a polycarbonate or glass roof suffer from some if not all of the issues as mentioned above, so what can be done about it?

We have the answer, without the need to remove and replace the entire roof.


Thermotec Insulated Roof Panels are the flagship product of the range. At 75mm thick and extremely hard wearing they are made using an inner and outer sheet of 2mm polyester powder coated aluminium with a high density insulating core and are available in any colour or colour combination of choice. Fully welded at the seams, these panels are totally rigid and are very strong. Absolutely zero solar gain in hot weather and no heat loss at all through the panels in Winter ensuring the conservatory is fully usable all year round whatever the weather outside saving money on ever increasing energy bills as well as total protection from potentially harmful UV rays. The panels are ‘stepped’ down at the edges to enable them to be retro fitted into existing or even new conservatory roof structures.

Thermotec insulated roof panels are subject to manufacturers size limitations. Suitability will be determined and assessed on an individual basis dependant on size and style of conservatory.