Skylight / July 12, 2018 / Odo Vaillancour
The acrylic dome is typically mounted in an aluminum frame which is in turn mounted on a box called a "curb." Once the hole is cut in the roof to the manufacturers specifications the curb is typically constructed on-site to raise the skylight above the level of the roof sheathing. Site-built or factory-supplied flashings are used to seal the roofing around the curb. Domed skylights are available in clear smoked bronze or other tints. Some domed plastic skylights are flush mounted which means that the lens piece and flashing piece are both made of plastic and then placed on the roof without a curb. The problem with this type is that they are loud and very susceptible to leakage.
The shape of the skylights installed in your home will impact the design and look of the room. In the past skylights were prone to vapor build-up during the cold season. This vapor would then trickle down as water droplets into the room. However these days it is possible to buy skylights with channels that collect water vapor. More expensive skylights are less vulnerable to condensation related problems. Material: The kind of material used on skylights at home has a direct impact on their look and efficiency. Glass and plastic are the most popular materials used for glazing the skylights. Plastic skylights are less expensive and do not break easily. However plastic glazing may become discolored over time and may even have scratches. Glass on the other hand is scratch proof and does not fade. But it is more expensive and is usually found in commercial structures.
Angled where the shaft is parallel to the pitch of the skylight. It too is the same dimension as the skylight but its straight-in angle offers more light than a straight shaft. Angled shafts also are used to connect two locations that cannot otherwise be aligned. This occurs when the skylight must be installed in a particular spot - between two trusses for example - and the shaft opening is likewise limited to a particular location on the ceiling that is not directly under the skylight. Splayed or pyramid in which the ceiling opening is larger than the skylight opening in width length or both. This type although a little harder to construct is the most popular simply because it allows a smaller skylight to illuminate a larger area.