How to Fix a Sagging Screen Door in 5 Steps

First, measure your screen door to select an appropriate turnbuckle. Turnbuckles are available in a 42-inch size for doors less than 36 inches wide and a 50-inch size for doors wider than 36 inches. A turnbuckle is a simple piece of rigging hardware you can use to adjust your door's tension. Each turnbuckle consists of a threaded body with two end fittings.

To assemble your turnbuckle, thread the rods into each end of your coupling nut. You'll feel the nut tighten or loosen both ends simultaneously with your movement. It's ideal to leave threads showing to allow room for more tightening as you fix a sagging screen door.

To get the turnbuckle into position, place it 2 inches above the bottom corner of the door on whichever side your handle is placed. Next, hold the turnbuckle against the hinge side of your door at a slight upward slant. The turnbuckle should be as flush against the door as possible to prevent interference with opening and closing the door. Once you're confident about its placement, mark screw holes in the door.

Use the spots you marked in step 3 to drill holes. Next, install your turnbuckle using screws and appropriately sized drill bits. Once the turnbuckle is in place, tighten the screws to make sure the turnbuckle is securely in place.

It's now time to turn the turnbuckle's coupling nut. This will accomplish the goal of tightening the rod so that you'll see the sagging portion of your screen door become taut. To do this, adjust the turnbuckle until you know the door becomes level. You may meet resistance from the coupling nut. In this case, pliers are used to manage the final turns. You should now be looking at a sag-free door!