The number of dome walls in a skylight refers to the number of layers or shells that make up the skylight dome. This has several implications:

1. Insulation: multiple dome walls generally provide better thermal insulation. For example, a double-walled skylight retains heat better than a single-walled, which helps to reduce energy costs, especially in colder climates. For heated spaces, minimum three walls are recommended to ensure insulation.

2. Durability: multi-walled skylights are often more robust and resistant to external influences, such as hail or falling objects.

3. Sound insulation: an increased number of dome walls can also help to reduce outside noise to keep your home nice and quiet.

4. Aesthetics and light distribution: the way light is filtered and distributed through a multi-walled skylight can be different than with a single-walled dome, which can result in different aesthetic effects and light quality within the space.

Choosing the right number of skylight dome walls depends on the specific needs of the project, the climate and personal preferences regarding aesthetics and functionality.

• Clear: maximum light transmission, perfect for spaces where natural daylight is desired.
• Opal: distributes light evenly and provides some degree of privacy.
• Heatstop: heat-reflective layer that helps blocking heat from the sun.

Indicates the amount of heat passing through the skylight. The lower the value, the better the insulation.

The Ut-value, or thermal transmittance, measures the amount of heat that passes through the skylight. This is an indication of the insulation properties of the skylight. A lower Ut-value means that the skylight insulates better and therefore loses less heat. This is especially important in colder climates or where energy efficiency is a priority.

Stands for light transmission and indicates how much daylight passes through the skylight.

The LT-value (light transmission) indicates how much daylight can pass through the skylight. A higher LT-value means that more natural light enters the room. This can contribute to a pleasant indoor environment and can even result in savings on lighting costs. Choosing the right LT-value depends on the specific needs of the room.

The solar energy transmission coefficient. Indicates how much solar heat is allowed through the skylight. The lower the value, the better the protection.

This is a measure of how much solar heat is allowed through the skylight. A low g-value means that the skylight effectively blocks the sun's heat, which is especially beneficial in warm climates or areas that are prone to overheating.

The sound insulation value. A higher value indicates that the skylight insulates better against outside noise.

A higher Rw-value indicates that the skylight is more effective at reducing outside noise, which results in a quieter home. This is particularly valuable in areas with heavy traffic or other disturbing noise sources.

If you choose a combination with a 25 mm SPC sheet, you provide an extra layer of insulation, which benefits both energy efficiency and comfort in the room.

Our PVC frames are specially designed for openable skylights. They offer excellent insulation, which drastically reduces the risk of condensation. Thanks to the built-in metal reinforcement points in the PVC frame, supports and other mounting components can be firmly attached. The top hinges are already pre-assembled for your convenience.

In addition, the Skylux PVC frames are equipped with a co-extruded wind and rain seal. When closing the skylight, the seal presses seamlessly onto the curb, which ensures a perfect seal against the elements. The additional advantage of these PVC frames is that they do not require any further finishing!