Nowadays, skylight manufacturers have developed new types of roof skylight that have a wide range of features. These features make the skylights very useful and also enhance the décor of your house. There are venting roof skylights which are excellent for fresh air circulation in your home. They have the added benefit of reducing costs of cooling the ceiling of the house by reducing the need for some extra cooling or using the ceiling fan to some extent. 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.