Proper installation of skylight and double glazing is vital to preventing leaks. In many homes, skylights and double panes are installed without taking into account the correct type of insulation, and poor installation can lead to a leak. The moisture is then trapped within the glass resulting in condensation and water damage. Proper installation is essential, because skylight leaks are difficult to detect and repair when discovered, and replacing the entire system is more expensive than repairing just one or two panes.

Insulation

Skylights can only be installed with insulation that is specifically designed for skylights, double panes, or a combination. If you are considering installing a skylight, make sure to contact a reputable contractor in your area who offers insulation for skylights. One type of insulation commonly used for skylights is drywall. Drywall insulation has the highest R-value of all the types of insulation, so it is an effective barrier against heat loss. Proper installation is also important in preventing leaks, and insulation is key to reducing condensation.

Repair

If you discover a leak on your skylight, there are a few options for repair. If the damage is minor, most home improvement stores sell replacement skylight parts. If the damage is significant, contact a contractor who offers a variety of options for repair. A qualified roofer will be able to assess the extent of the damage, the cause of the skylight leak, and the best course of action for repair.

Flashing 

A qualified roofer will suggest the best flashing method for your particular situation, and will likely recommend adding skylight leak flashing to the roof membrane as well. Adding flashing is a relatively simple process, and should not require the services of a professional roofer. Some of the products sold for roofing purposes have specially designed flashing, and are available without a professional installation. In many cases, all that is needed is some tape, and preparation for an application, such as pouring the concrete. The finished product should resemble the design of the finished ceiling or wall.

Insulation

There are several reasons why skylight leaks may occur. Poorly insulated ceiling tiles, flashing, or poor insulation can all contribute to leaky conditions. In addition, standing water in the attic could be causing leaky conditions as well. If the leak is located near a plumbing fixture, such as a drain, it is often possible to waterproof the area with a special coating.

It is always advisable to hire a professional if you discover any signs of leaky conditions. If the leak is located in the roof, or behind shingles, there are several options for repair. Sagging shingles can be replaced with new ones, which will extend the life of your roof. Other measures, including placing caulk around the perimeter of the opening, sealing with sealant, or replacing flashing, can help prevent future skylight leaks. Before calling a contractor, however, it is important to ensure that the cause of the leak is determined.