Dome skylights offer many advantages to the homeowner. They are lightweight and require little, or no maintenance. They are the best choice for a skylight if you live in a climate with extreme temperatures since they keep energy transfer to a minimum. They can be purchased as a single, double, or triple dome, but if you are looking for energy efficiency you should only consider a double or triple dome.
A dome skylight is suitable for any roof, including flat roofs. In fact they are particularly well suited for flat roofs due to the fact that they shed water quickly because of the “self-cleaning” aspect of the dome. Typically, the dome’s height is approximately 25% of the width of the skylight which allows the water to quickly flow off the surface.
The ability to gather light from many angles is another big advantage of the dome skylight, unlike a flat skylight which only allows direct light to enter. If illuminating a room is the main concern then a clear acrylic dome is the best choice. If you are looking for a more gentle lighting effect then a white or bronze acrylic dome is the best alternative—especially for light-sensitive people. The white or bronze skylight has the effect of softening the light entering the room and tends to eliminate the glare.
Finally, a big advantage of an acrylic dome skylight is that its shape is much stronger than a flat acrylic skylight. Flat sheets of plastic typically have a much greater tendency to expand and contract which can lead to earlier failure of the material.
Overall, the choice of a dome skylight will be determined by your individual needs but, in general, it will be one of the best options if you are looking for a skylight with energy efficiency, ability to illuminate, and longevity.