Reducing Heat From the Sun
It is important to note that angled roof lights provide a benefit in energy efficiency since they gain more from the free heat provided by the sun than vertical windows. This is particularly important in the roof area.
Having too much heat or light enter through the window can present as much of a problem as trying to keep heat in. Anyone who has installed a conservatory on a South facing wall will testify to the high temperatures they have to endure. Fortunately you do not have to sacrifice good energy efficiency to reduce the heat from the sun because we can combine both in one product.
Control of the sun's heat can be achieved in a number of ways. The most popular is by using a coloured glass such at the Pilkington Optifloat™ Tint range or Pilkington Arctic Blue™ which simply reduce incoming heat transmission. A similar effect can be achieved using a sandwich of glass with a tinted interlayer Pilkington Optilam™ I. For higher levels of performance a coated glass which can be either look clear or coloured such as the Pilkington Eclipse Advantage™ and the Pilkington Suncool™ ranges.
You just need to decide what level of light transmission and solar heat reduction you require.
Pilkington's own Insulating Glass Units for managing solar heat reduction are known as Pilkington Insulight™ Sun.