How to Prevent Heat Loss From Your Skylight During the Winter

Image of a circular skylight inside a home

While skylights will increase the level of light in your home, they can lead to heat loss in wintertime. Learn how to reduce or prevent heat loss from skylights to conserve energy this winter.

Skylight Selection

Existing skylights probably suffer from energy loss, but the newest generation of skylights is more efficient. Replacing old skylights can reduce energy loss; when installing new skylights, considering the location and materials will help you save energy.

Like home windows, skylights come in Energy Star models. By choosing an Energy Star model rated for your climate, you can decrease heat loss.

The placement of the skylight affects heat loss or gain. A south-facing skylight can warm your home in winter, but this also means it will add heat during summer months (this can be mitigated with a skylight shade, but you will lose light). A north-facing skylight increases light without affecting home heat. Size matters too for skylights: Depending on the amount of windows in a room, the skylight should be no larger than 5 to 15 percent of the floor area.

Skylight glazing is an option when you want to add light without increasing solar heat. A protective glaze, usually made of plastic or glass, allows light to pass through while increasing energy efficiency. Special coatings add insulation, absorb heat, or reduce emissivity to make skylights more energy efficient. A professional installer can walk you through the options and help you choose what’s right for your house.

Professional Installation

Skylights should always be installed by professionals, not least because if installation is done improperly, the skylight will leak. During professional installation, a technician will seal the joints, install a watertight lip and flashing, and mount the skylight above the roof line– all factors that ensure the skylight will operate as intended.

A professional will also consider the slope of the skylight, something that affects the amount of heat gained or lost. A 45-degree angle usually works well; lower slopes lead to heat loss in winter.

Professional installation also includes moisture control measures, which keep out winter chill by preventing things like ice dams.

Brandstetter’s KangaRoof is your trusted Cincinnati skylight service professional. We can replace existing skylights or install new skylights, and we offer a selection of high-quality skylights that won’t lose heat in winter. Contact us now for a free estimate.