Sliding Glass Door
One more reason why we'd like people to put their locations on their posts. IF you are in an area that is getting these unusual cold spells this year, AND considering that this is rental property: IF you do not use this sliding glass door often, or could do without it until warmer weather: I would caulk all around it to stop the drafts, caulk is removable. As "Bondo" stated: Hanging a blanket in front of it, or some heavy drapes would also help to stop drafts. IF you put up drapes you can open them up during the day to allow any sunshine to help warm the area, then close them off at night to help keep out the cold air. And--as ugly as it can be, this works: IF you are not using this door, buy one of the plastic covers that go over it on the outside to prevent drafts. They do help.