Zenon Roof Lights

Rooflights should usually be carried on their edge and in accordance with the pallet labelling. Rooflight sheets and panels are relatively lightweight for their size and therefore special care is required in windy conditions, especially on the roof.

They usually arrive palletised on a truck. Any access limitations on vehicle size or delivery times should be advised at the time of order.

No rooflight supplied for any roofing application should be walked on unless specifically designed to do so. Only glass rooflights designed to floor-loading type applications should be considered for this use. No rooflight suitable for use in lightweight metal clad buildings can be considered suitable.

Not many construction products can deliver something valuable that is entirely free.  Maximising the benefit of this natural resource, in conjunction with automated lighting controls, can save more energy in a building now that increased levels of insulation are delivering significantly reduced returns. During the

The ƒ-factor of a product or assembly is an internal surface temperature comparison against outside air temperatures to determine the risk of surface condensation. For a well-insulated wall or roof, the ƒ-factor would be close to 1 and condensation unlikely. A poorly insulated element or

No, as this would be impossible due to different environments, cleaning regimes etc. When designing for the building’s energy performance, it is prudent to apply a ‘maintenance factor‘ depending on the location and environment of the building.

This would depend on the use of the building and being able to strike the best balance of rooflight specification choice for that building. Insufficient rooflight areas can lead to areas of gloom and shadow that requires the use of artificial lighting to overcome poor

Generally, more energy is saved by reducing the energy consumed by artificial lighting than is used for heating purposes. Low U-value rooflights are not always the best solution for a building if the light transmission is reduced. The more layers added into a rooflight, the more the

It’s a measure of the rate of heat flow through the building fabric or a building component; the lower the U-value or rate of flow, the better the insulating ability.  Thermal performance is expressed in units of energy (Watts) per m2 per temperature degree difference. It is an

Uniform lighting, whether by natural daylight or by artificial lighting, is important where there is a requirement to operate in an environment with significant differences in lighting levels. Changes between well and poorly lit areas, especially where glare occurs, can cause significant eye discomfort, leading to stress

The diffusion in GRP materials is created by the refraction of light passing through the resin and glass. The more changes that the light passes through, the more diffused the light becomes. Where diffusion may be stated as 100%, this has no useful meaning as it ignores any reference to

Diffused light is a soft light with neither the intensity nor the glare of direct light. The light is scattered when passing through diffusers and naturally diffusing materials such as GRP and avoids glare and harsh shadows giving a more even spread of light throughout the building. Diffused