Many homeowners love spending their weekend afternoons in backyard gazebos. They can read, enjoy drinks with a few friends, and watch the lightning bugs come out after sunset during the summer. However, some climates get so hot in the summer — and so cold in the winter — that backyard gazebos can be used only for a few months out of the year. But you can take the following three steps to upgrade your gazebo for year-round use. Screen the Sides for Better Insect Control: While spending time outside is one of the best parts of summer, many people end up running indoors as soon as the sun starts to set. Mosquitos can be relentless when the sun goes down, and they can carry dangerous diseases such as West Nile …