The insulation on knob-and-tube wiring gets brittle with age. When you’re working with it, the insulation may just crumble in your hands. You can easily re-insulate a section using a length of the plastic jacket from a piece of nonmetallic sheathed cable (often referred to as Romex).
Every homeowner should have a stash of these tiny, versatile straps on hand. Zip ties can help you conquer clutter, work hands-free and even see in the dark. Check out 13 Zip Tie Hacks That Make DIYing a Cinch.