Most conservatories are built with a thin polycarbonate roof supposedly to let in more sunlight. In truth the reason for supplying a plastic roof is to keep the price down.
For a very modest cost you can turn your summer-room-only into an all year round room. Turn your under used cold conservatory into a proper living room.
The cost of a new extension to your house probably starts at about £30,000 - and then some, whereas you may already have an under-used conservatory which is great for the few warm months of the year but hardly used for the rest.
For a very modest cost we can fit a new lightweight tiled roof with full thermal insulation that meets Building Regualtion standard. This means a room that is cooler in summer but most importantly nice and warm for the rest of the year.