What types of skylights should you consider? First, determine how you’d like to utilize your skylight. Do you simply want extra sunlight or do you also want to be able to open it and enjoy a fresh breeze? If it’s the former, you’ll want a fixed skylight, and if it’s the latter, you’ll need a ventilating skylight. Or, if you want to install a skylight in an enclosed space such as a hallway or pantry, choose a tubular skylight. Decide what style will best complement your space. In general, skylights are offered in flat, arched, domed and pyramid shapes.

Where should you install the skylight? The direction your skylight faces can make a big difference when it comes to energy efficiency. An east-facing skylight will provide abundant heat and sun in the morning, while one facing west will fill the room with sunlight at the end of the day. North-facing skylights will provide steady sunlight that’s not overbearing, while south-facing skylights will retain heat.

What features might you want to add to your skylights? If your skylight faces east or west, you may want to add a blind to control the amount of sunlight that you let in to your space. You may also want to consider heat-absorbing units, UV protection or low-emissivity coatings to increase energy efficiency and prevent furniture beneath the skylight from fading. If you have a ventilating skylight, open it easily by choosing a motorized unit, and have it close automatically by installing moisture sensors for when it rains.

What types of glazes should you consider? Glazing your skylights will further improve their energy efficiency. Economical and sturdy, plastic glazing is an affordable option yet isn’t as effective at blocking UV rays and may yellow over time. Glass glazing is more expensive, but is also more durable.

How large should your skylights be? For maximum effect, your skylight should complement the size of the room it’s being installed in. When determining the right size, think about trying to equal one square foot of skylight for every 20’ of floor space. Don’t allow the skylight to take up more than 15 of the floor area in rooms with few windows, and no more than 5 in rooms with ample windows.

What type of light shaft will work best for your space? Choosing a light shaft relies on both an aesthetic preference as what your roof or ceiling can accommodate. Flared shafts will provide a larger beam of light due to an extended base, while straight shafts work better for flat ceilings short on area. If your ceiling is fastened directly to rafters, such as a cathedral or high-sloped ceilings, you may be able to install your skylights without a shaft.

Take a look at a variety of skylights and windows for your roof here.