Skylight / July 12, 2018 / Odo Vaillancour
The air near the ceiling is automatically cooled when fresh air flows in from outside. These roof skylights are so designed that they open and close a little to let in the fresh air. The glass tilts at about 45 degrees. There is a small handle to manually open the venting roof skylight. You crank the handle slightly to open or close or adjust the angle and position of the glass. The venting roof skylights are located in the ceiling of the house and are hard to reach so there is an extension to the handle. Otherwise every time you want to open or shut the venting roof skylight you will need a ladder or a high stool. Nowadays electronically operated venting skylights are also becoming very popular.
For example the optimum slope for a south-facing skylight in Columbus Ohio at 40º North latitude is 45º to 55º. Every skylight has a "shaft" which governs how much light is admitted into the room below. If all four sides are flared then the light is spread over a wide area. If your skylight has a shaft with perpendicular sides the light is focused straight below. If your skylights shaft is flared on only one or two sides then the light is sprayed in the flared direction. Ventilation If you wish you can have a skylight which also provides ventilation as well as light to your room. This allows you to release the hot air which collects at your ceiling.
Some people in an effort to let in plenty of light choose the biggest skylight they can afford. But bigger is not always better when it comes to choosing skylights for your home. The size of the skylight should not be more than 5% of the floor space if there are other windows in the room. It should be less than 15% of the floor space if there are few windows in the room. Unlike commercial buildings where structures are huge there is only so much that a room within the house can take. So choose skylights that suit the size of the room. Style: Although most skylights are rectangular these are available in a variety of sizes shapes and colors.