Skylights are a beautiful way to bring in natural light and fresh air into a room. They can be ventilated and can be opened, or fixed and always closed. How many you need depends on the climate in your area. Skylights can pose design, security and energy challenges, so you should plan ahead. Positioning can be tricky. Problems such as leakage if the joints are not tightly sealed, breakage and losing solar gain in winter can cause you to spend more on replacement and heating and cooling. In some cases, tubular skylights, which are narrow and use a mirror , may be more practical. Choose solar heat control glazing instead of plastic glazing and single-pane glass, as heat-absorption tints, low-emissivity coatings and insulating glazing conserve energy.

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