Got a patio screen door that's worse for wear? Or an entry screen door that's barely there? Here's how to re-screen a better way. We're talking about retractable screens for all exterior home-entry doors. You've probably seen them advertised, but assumed they were unaffordable. They are, however, affordable and easy to install. Retractable screens can open from the right or left, and double doors require two screens that meet in the middle. All you do is mount the roller housing on the side, cut the tracks and sill plate to the correct width, install them and attach the magnetic side catch.