An outside hang is when the mosquito curtain is hung on the outside of any support columns and railings. Since wind always blows towards your protected space, support columns offer natural structure to your curtain and helps to keep the bottom of your curtain stable, often without even securing the base.

Outside hangs tend to look better from the interior as the eye wants to directly see the support columns. Outside hangs maximize the usable space of your porch and enable you to rest a soda/margarita on the rail. If choosing a Velcro attachment, strongly consider an outside hang. It is easier to wrap something around a barrel than along the inside of a barrel.

Inside hangs have better curb appeal if your porch is on the front of your house. Often, inside hangs require elastic cord to act as a rib to brace the curtain. It is typical for tracking applications to use an inside hang if the curtain turns a corner since they tend to swag (decoratively tie back) better. In practice, most of the time tracked curtains are swagged open, and the tied back look is as important as when mosquito curtains are closed to protect you.

When your curtain does not turn a corner, and the sides can be secured to either your house or a support column along a single plane, then the difference between an inside and an outside hang is less relevant. To accomplish this, use a separate panel for each exposed side unless you have irregularly shaped columns.