Flat roof lights or skylights are better than traditional windows in a lot of ways. Of course sometimes it is not possible to install the former due to space shortage but that does not make it an inflexible choice. However, before reaping the benefits of these skylights, first we have to know about the factors that help in choosing the right flat roof lights.
Guiding Factors for Choosing Flat Skylights
The following factors are applicable regardless of where the skylight is installed. These are:
- Size
- Type
- Location
- Insulation
- Cost
Size
First thing to consider is the actual size of the roof light and size does matter. However, that does not mean bigger is better because the level of illumination and heat are directly related to the size. Choosing a disproportionate skylight would result in either a dim and damp or extra bright and hot room (for instance). On the other hand, when properly chosen, even a small roof light can light up any space efficiently.
Type
With all complexities aside, there are mainly two types of flat skylights: fixed and vented. A vented or open flat skylight can be opened whenever necessary with the help of a switch. This is the better choice when you want more air circulation in the room. However, open skylights also let in unwanted insects so it is better to install an insect screen as well. You can also install sensors that automatically close the open roof lights during rain or storms. On the other hand, as the name suggests, a fixed roof light cannot be opened and is traditionally installed in warehouses.
Location
You also need to consider the actual location where you want to install the roof light. For instance, if you want a constant amount of illumination throughout the whole day, choosing a north-facing side is the best option. However, you might not get the desired level of heat in this way. When installed in an east-facing side, you will get the maximum amount of light and heat in the morning while installing in a west-facing side would ensure the same facilities during the afternoon. Usually a south-facing side is least favoured since they offer the lowest level of illumination. However, a south-facing roof light also provides the highest amount of heat during winters. Other than the sides, the actual construction or architecture of the house also needs to be considered. Sometimes favourable sides become unfavourable due to columns, beams and/or wiring.
Insulation
Insulation is the most important factor when controlling space temperature is your most vital requirement. When a skylight is better at trapping heat compared to others, it is considered more efficient. And this efficiency is measured by the “U value”. The U-value measures the amount of lost heat so naturally the lower it is the better. Regular flat skylights usually offer a U-value of 1.24 W/m2k while the greener versions often offer 0.87 W/m2k. These skylights also come in double and triple glazing.
Cost
This is the ultimate decisive factor for most of us and depends completely on the other four factors mentioned. However, you might also need to add in the expenses for professional assistance if you are not handy with this kind of works. Remember, better to be safe than sorry.
Flat roof lights are more efficient than traditional windows and always the better option when you can choose either of them.