If the most important feature of your conservatory is going to be light, a glass or polycarbonate roof system is just what you need.
For glass roofs the standard specification used is Pilkington Sunshade Blue with self-cleaning and low e coatings. Combining the solar control coating with our energy efficient glass units provides unbeatable thermal insulation, a U-value of 1.0W/m2K, reflecting heat back into the room and reducing heat loss more effectively than traditional low-emissivity glass products. The result? You can have the best of both worlds, our double-glazed units provide - solar control coating on the outer face to keep cooler in warmer summer months, and the thermal retention properties of the low ‘e’ coating on the inner pane to keep the room warm in the winter.
An alternative to glass is polycarbonate panels, available in a wide range of colours and thicknesses to suit your budget and conservatory colour, polycarbonate can be treated to offer excellent solar protection and thermal properties, with a U-value of 1.7 W/m2K to 1.3 W/m2K dependant on the thickness and colour. One of the ways in which the thermal properties of the polycarbonate can be increased is by using a layer of foil inserts inside the polycarbonate panels which will increase the solar rejection therefore lowering the u-value. However, this is at the cost of light transmission, while Pilkington Sunshade blue glass is 80% and polycarbonate varies from 8% to 51% depending on the colour chosen.